Not to be confused with Psychopathy.
For other uses, see Psychosis (disambiguation).
Psychosis |
Classification and external resources |
ICD-10 |
F20- F29[1] |
ICD-9 |
290-299 |
OMIM |
603342 608923 603175 192430 |
MedlinePlus |
001553 |
MeSH |
F03.700.675 |
Psychosis (from the Greek ψυχή "psyche", for mind/soul, and -ωσις "-osis", for abnormal condition or derangement) refers to an abnormal condition of the mind, and is a generic psychiatric term for a mental state often described as involving a "loss of contact with reality". People suffering from psychosis are described as psychotic.
Psychosis (as a sign of a psychiatric disorder) is first and foremost a diagnosis of exclusion; that is, a new-onset episode of psychosis cannot be considered to be a symptom of a psychiatric disorder until other relevant and known causes of psychosis are properly excluded, or ruled out.[2] Medical and biological laboratory tests should exclude central nervous system diseases and injuries, diseases and injuries of other organs, illicit substances, toxins, and prescribed medications as causes of symptoms of psychosis before any psychiatric illness can be diagnosed.[2] In medical training, psychosis as a sign of illness, is often compared to "fever," since it can have multiple causes that aren't readily apparent.[2]
The term "psychosis" is very broad and can mean anything from relatively normal aberrant experiences through to the complex and catatonic expressions of schizophrenia and bipolar type 1 disorder.[3][4][5] In properly diagnosed psychiatric disorders (where other causes have been excluded by extensive medical and biological laboratory tests), psychosis is a descriptive term for the hallucinations, delusions, sometimes violence, and impaired insight that may occur.[6][7] Psychosis is generally given to noticeable deficits in normal behavior (negative signs) and more commonly to diverse types of hallucinations or delusional beliefs (e.g. grandiosity, delusions of persecution).
An excess in dopaminergic signalling is hypothesized to be linked to the positive symptoms of psychosis, especially those of schizophrenia; however, this hypothesis has not been definitively supported. The dopaminergic mechanism is thought to involve the aberrant salience of environmental stimuli.[8] Many antipsychotic drugs accordingly target the dopamine system; however, meta-analyses of placebo-controlled trials of these drugs show either no significant difference in effects between drug and placebo, or a very small effect size, suggesting that the pathophysiology of psychosis is much more complex than an overactive dopamine system.[9][10]
People experiencing psychosis may exhibit some personality changes and thought disorder. Depending on its severity, this may be accompanied by unusual or bizarre behavior, as well as difficulty with social interaction and impairment in carrying out daily life activities.
Contents
- 1 Signs and symptoms
- 1.1 Hallucinations
- 1.2 Delusions
- 1.3 Catatonia
- 1.4 Thought disorder
- 2 Psychiatric disorders
- 2.1 Normal states
- 2.2 Subtypes
- 2.3 Medical conditions
- 2.4 Psychoactive drugs
- 2.5 Medication
- 3 Pathophysiology
- 4 Diagnosis
- 5 Prevention
- 6 Treatment
- 7 History
- 8 References
- 9 Further reading
- 10 External links
Signs and symptoms[edit]
People with psychosis may have one or more of the following: hallucinations, delusions, catatonia, or a thought disorder, as described below. Impairments in social cognition also occur.[11][12]
Hallucinations[edit]
A hallucination is defined as sensory perception in the absence of external stimuli. Hallucinations are different from illusions, or perceptual distortions, which are the misperception of external stimuli.[13] Hallucinations may occur in any of the five senses and take on almost any form, which may include simple sensations (such as lights, colors, tastes, and smells) to experiences such as seeing and interacting with fully formed animals and people, hearing voices, and having complex tactile sensations.
Auditory hallucinations, particularly experiences of hearing voices, are a common and often prominent feature of psychosis. Hallucinated voices may talk about, or to, the person, and may involve several speakers with distinct personas. Auditory hallucinations tend to be particularly distressing when they are derogatory, commanding or preoccupying. However, the experience of hearing voices need not always be a negative one. One research study has shown that the majority of people who hear voices are not in need of psychiatric help.[14] The Hearing Voices Movement has subsequently been created to support voice hearers, regardless of whether they are considered to have a mental illness or not.
Delusions[edit]
Psychosis may involve delusional beliefs, some of which are paranoid in nature. Put simply, delusions are false beliefs which a person holds on to, without adequate evidence. It may be difficult to change the belief even with evidence to the contrary. Common themes of delusions are persecutory (person believes that others are out to harm him/her), grandiose (person believing that he or she has special powers or skills) etc. Depressed persons may have delusions consistent with their low mood e.g., delusions that they have sinned, or have contracted serious illness etc. Karl Jaspers has classified psychotic delusions into primary and secondary types. Primary delusions are defined as arising suddenly and not being comprehensible in terms of normal mental processes, whereas secondary delusions may be understood as being influenced by the person's background or current situation (e.g., ethnicity; religious, superstitious, or political beliefs).[15]
Catatonia[edit]
Catatonia describes a profoundly agitated state in which the experience of reality is generally considered to be impaired. There are two primary manifestations of catatonic behavior. The classic presentation is a person who does not move or interact with the world in any way while awake. This type of catatonia presents with waxy flexibility. Waxy flexibility is when someone physically moves part of a catatonic person's body and the person stays in the position even if it is bizarre and otherwise nonfunctional (such as moving a person's arm straight up in the air and the arm stays there).
The other type of catatonia is more of an outward presentation of the profoundly agitated state described above. It involves excessive and purposeless motor behavior as well as extreme mental preoccupation which prevents intact experience of reality. An example would be someone walking very fast in circles to the exclusion of anything else with a level of mental preoccupation (meaning not focused on anything relevant to the situation) that was not typical of the person prior to the symptom onset. In both types of catatonia there is generally no reaction to anything that happens outside of them. It is important to distinguish catatonic agitation from severe bipolar mania, although someone could have both.
Thought disorder[edit]
Thought disorder describes an underlying disturbance to conscious thought and is classified largely by its effects on speech and writing. Affected persons show loosening of associations, that is, a disconnection and disorganization of the semantic content of speech and writing. In the severe form speech becomes incomprehensible and it is known as "word salad".
Psychiatric disorders[edit]
From a diagnostic standpoint, organic disorders were those held to be caused by physical illness affecting the brain (that is, psychiatric disorders secondary to other conditions), while functional disorders were considered to be disorders of the functioning of the mind in the absence of physical disorders (that is, primary psychological or psychiatric disorders). The materialistic view of the mind–body problem holds that mental disorders arise from physical processes; in this view, the distinction between brain and mind, and therefore between organic and functional disease, is an artificial one. Subtle physical abnormalities have been found in illnesses traditionally considered functional, such as schizophrenia. The DSM-IV-TR avoids the functional/organic distinction, and instead lists traditional psychotic illnesses, psychosis due to general medical conditions, and substance-induced psychosis.
Primary psychiatric causes of psychosis include the following:[16][17][18]
- schizophrenia and schizophreniform disorder
- affective (mood) disorders, including severe depression, and severe depression or mania in bipolar disorder (manic depression). People experiencing a psychotic episode in the context of depression may experience persecutory or self-blaming delusions or hallucinations, while people experiencing a psychotic episode in the context of mania may form grandiose delusions.
- schizoaffective disorder, involving symptoms of both schizophrenia and mood disorders
- brief psychotic disorder, or acute/transient psychotic disorder
- delusional disorder (persistent delusional disorder)
- chronic hallucinatory psychosis
Psychotic symptoms may also be seen in[18]
- schizotypal disorder
- certain personality disorders at times of stress (including paranoid personality disorder, schizoid personality disorder, and borderline personality disorder)
- major depressive disorder in its severe form although it is possible and more likely to have severe depression without psychosis
- bipolar disorder in severe mania and/or severe depression although it is possible to have severe mania and/or severe depression without psychosis as well, in fact that is more commonly the case
- post-traumatic stress disorder
- induced delusional disorder
- Sometimes in obsessive-compulsive disorder
Stress is known to contribute to and trigger psychotic states. A history of psychologically traumatic events, and the recent experience of a stressful event, can both contribute to the development of psychosis. Short-lived psychosis triggered by stress is known as brief reactive psychosis, and patients may spontaneously recover normal functioning within two weeks.[19] In some rare cases, individuals may remain in a state of full-blown psychosis for many years, or perhaps have attenuated psychotic symptoms (such as low intensity hallucinations) present at most times.
Normal states[edit]
Brief hallucinations are not uncommon in those without any psychiatric disease. Causes or triggers include[18]
- falling asleep and waking: hypnagogic and hypnopompic hallucinations, which are entirely normal[20]
- bereavement, in which hallucinations of a deceased loved one are common[18]
- severe sleep deprivation[21][22][23]
- sensory deprivation and sensory impairment
- caffeine intoxication
- extremely stressful event
Subtypes[edit]
Subtypes of psychosis include:
- Menstrual psychosis, including circa-mensual (approximately monthly) periodicity, in rhythm with the menstrual cycle.
- Postpartum psychosis, occurring recently after childbirth
- Monothematic delusions
- Myxedematous psychosis
- Occupational psychosis
- Stimulant psychosis
- Tardive psychosis
- Shared psychosis
- Cycloid psychosis
Cycloid psychosis[edit]
Cycloid psychosis is psychosis that progresses from normal to full-blown usually within a few hours, not related to drug intake or brain injury.[24] In addition, diagnostic criteria include at least four of the following symptoms:[24]
- Confusion
- Mood-incongruent delusions
- Hallucinations
- Pan-anxiety, a severe anxiety not bound to particular situations or circumstances
- Happiness or ecstasy of high degree
- Motility disturbances of akinetic or hyperkinetic type
- Concern with death
- Mood swings to some degree, but less than what is needed for diagnosis of an affective disorders
Cycloid psychosis occurs in people of generally 15–50 years of age.[24]
Medical conditions[edit]
A very large number of medical conditions can cause psychosis, sometimes called secondary psychosis.[18] Examples include:
- disorders causing delirium (toxic psychosis), in which consciousness is disturbed
- neurodevelopmental disorders and chromosomal abnormalities, including velocardiofacial syndrome
- neurodegenerative disorders, such as Alzheimer's disease,[25] dementia with Lewy bodies,[26] and Parkinson's disease[27]
- focal neurological disease, such as stroke, brain tumors,[28] multiple sclerosis,[29] and some forms of epilepsy
- malignancy (typically via masses in the brain, paraneoplastic syndromes, or drugs used to treat cancer)
- infectious and postinfectious syndromes, including infections causing delirium, viral encephalitis, HIV,[30] malaria,[31] Lyme disease,[32][33][34] syphilis[35][36]
- endocrine disease, such as hypothyroidism, hyperthyroidism, adrenal failure, Cushing's syndrome, hypoparathyroidism and hyperparathyroidism; sex hormones also affect psychotic symptoms and sometimes childbirth can provoke psychosis, termed puerperal psychosis
- inborn errors of metabolism, such as Succinic semialdehyde dehydrogenase deficiency, porphyria and metachromatic leukodystrophy[37][38][39]
- nutritional deficiency, such as vitamin B12 deficiency[40][41]
- other acquired metabolic disorders, including electrolyte disturbances such as hypocalcemia,[42] hypernatremia,[43] hyponatremia,[44] hypokalemia,[45] hypomagnesemia,[46] hypermagnesemia,[47] hypercalcemia,[48] and hypophosphatemia,[49] but also hypoglycemia,[50] hypoxia, and failure of the liver or kidneys
- autoimmune and related disorders, such as systemic lupus erythematosus (lupus, SLE),[51] sarcoidosis,[52] Hashimoto's encephalopathy,[53][54][55] and anti-NMDA-receptor encephalitis[56]
- poisoning, by therapeutic drugs (see below), recreational drugs (see below), and a range of plants, fungi, metals, organic compounds, and a few animal toxins[18]
- some sleep disorders, including hallucinations in narcolepsy (in which REM sleep intrudes into wakefulness)[18]
Psychosis can even be caused by familiar ailments such as flu[57][58] or mumps.[59]
Psychoactive drugs[edit]
Main article: Substance-induced psychosis
Various psychoactive substances (both legal and illegal) have been implicated in causing, exacerbating, and/or precipitating psychotic states and/or disorders in users. This may be upon intoxication, for a more prolonged period after use, or upon withdrawal.[18] Individuals who have a substance induced psychosis tend to have a greater awareness of their psychosis and tend to have higher levels of suicidal thinking compared to individuals who have a primary psychotic illness.[60] Drugs that can induce psychotic symptoms include cannabis, cocaine, amphetamines, cathinones, psychedelic drugs (such as LSD and psilocybin), κ-opioid receptor agonists (such as enadoline and salvinorin A) and NMDA receptor antagonists (such as phencyclidine and ketamine).[18]
- Alcohol
Approximately 3 percent of people who are suffering from alcoholism experience psychosis during acute intoxication or withdrawal. Alcohol related psychosis may manifest itself through a kindling mechanism. The mechanism of alcohol-related psychosis is due to the long-term effects of alcohol resulting in distortions to neuronal membranes, gene expression, as well as thiamin deficiency. It is possible in some cases that alcohol abuse via a kindling mechanism can cause the development of a chronic substance induced psychotic disorder, i.e. schizophrenia. The effects of an alcohol-related psychosis include an increased risk of depression and suicide as well as causing psychosocial impairments.[61]
- Cannabis
The more often cannabis is abused the more likely a person is to develop a psychotic illness,[62] with frequent use being correlated with twice the risk of psychosis and schizophrenia.[63][64] While cannabis use is accepted as a contributory cause of schizophrenia by many,[65] it remains controversial.[66][67] Some studies indicate that the effects of two active compounds in cannabis, tetrahydrocannabinol (THC) and cannabidiol (CBD), have opposite effects with respect to psychosis. While THC by itself tends to induce psychotic symptoms, CBD tends to reduce them, particularly in people who are at risk for or who already exhibit psychosis.[68] However, cannabis used to attain a "high" is typically very low in CBD content, but conversely very high in THC content. Since most cannabis contains much more THC than cannabidiol, CBD's protective effect may not be present, while THC's detrimental effect remains. Cannabis use has increased dramatically over the past few decades whereas the rate of psychosis has not increased. Together, these findings suggest that cannabis use may hasten onset of psychosis in those who may be already predisposed to psychosis.[69]
- Methamphetamine
Methamphetamine induces a psychosis in 26-46 percent of heavy users. Some of these people develop a long-lasting psychosis that can persist for longer than 6 months. Those who have had a short-lived psychosis from methamphetamine can have a relapse of the methamphetamine psychosis years later after a stress event such as severe insomnia or a period of heavy alcohol abuse despite not relapsing back to methamphetamine. Individuals who have long history of methamphetamine abuse and who have experienced psychosis in the past from methamphetamine abuse are highly likely to rapidly relapse back into a methamphetamine psychosis within a week or so of going back onto methamphetamine. Violence is common during a methamphetamine psychosis.[60]
Medication[edit]
Administration, or sometimes withdrawal, of a large number of medications may provoke psychotic symptoms.[18] Drugs that can induce psychosis experimentally and/or in a significant proportion of patients include amphetamine and other sympathomimetics, dopamine agonists, ketamine, corticosteroids (often with mood changes in addition), and some anticonvulsants such as vigabatrin.[18][70]
Pathophysiology[edit]
The first brain image of an individual with psychosis was completed as far back as 1935 using a technique called pneumoencephalography[71] (a painful and now obsolete procedure where cerebrospinal fluid is drained from around the brain and replaced with air to allow the structure of the brain to show up more clearly on an X-ray picture).
The purpose of the brain is to collect information from the body (pain, hunger, etc.), and from the outside world, interpret it to a coherent world view, and produce a meaningful response. The information from the senses enter the brain in the primary sensory areas. They process the information and send it to the secondary areas where the information is interpreted. Spontaneous activity in the primary sensory areas may produce hallucinations which are misinterpreted by the secondary areas as information from the real world.
For example, a PET or fMRI scan of a person who claims to be hearing voices may show activation in the primary auditory cortex, or parts of the brain involved in the perception and understanding of speech.[72]
Tertiary brain cortex collects the interpretations from the secondary cortexes and creates a coherent world view of it. A study investigating structural changes in the brains of people with psychosis showed there was significant grey matter reduction in the right medial temporal, lateral temporal, and inferior frontal gyrus, and in the cingulate cortex bilaterally of people before and after they became psychotic.[73] Findings such as these have led to debate about whether psychosis itself causes excitotoxic brain damage and whether potentially damaging changes to the brain are related to the length of psychotic episode. Recent research has suggested that this is not the case[74] although further investigation is still ongoing.
Studies with sensory deprivation have shown that the brain is dependent on signals from the outer world to function properly. If the spontaneous activity in the brain is not counterbalanced with information from the senses, loss from reality and psychosis may occur after some hours. A similar phenomenon is paranoia in the elderly when poor eyesight, hearing and memory causes the person to be abnormally suspicious of the environment.
On the other hand, loss from reality may also occur if the spontaneous cortical activity is increased so that it is no longer counterbalanced with information from the senses. The 5-HT2A receptor seems to be important for this, since psychedelic drugs which activate them produce hallucinations.
However, the main feature of psychosis is not hallucinations, but the inability to distinguish between internal and external stimuli. Close relatives to psychotic patients may hear voices, but since they are aware that they are unreal they can ignore them, so that the hallucinations do not affect their reality perception. Hence they are not considered to be psychotic.
Psychosis has been traditionally linked to the neurotransmitter dopamine. In particular, the dopamine hypothesis of psychosis has been influential and states that psychosis results from an overactivity of dopamine function in the brain, particularly in the mesolimbic pathway. The two major sources of evidence given to support this theory are that dopamine receptor D2 blocking drugs (i.e., antipsychotics) tend to reduce the intensity of psychotic symptoms, and that drugs which boost dopamine activity (such as amphetamines and cocaine) can trigger psychosis in some people (see amphetamine psychosis).[8] However, increasing evidence in recent times has pointed to a possible dysfunction of the excitory neurotransmitter glutamate, in particular, with the activity of the NMDA receptor.
This theory is reinforced by the fact that dissociative NMDA receptor antagonists such as ketamine, PCP and dextromethorphan (at large overdoses) induce a psychotic state more readily than dopaminergic stimulants, even at "normal" recreational doses. The symptoms of dissociative intoxication are also considered to mirror the symptoms of schizophrenia, including negative psychotic symptoms, more closely than amphetamine psychosis. Dissociative induced psychosis happens on a more reliable and predictable basis than amphetamine psychosis, which usually only occurs in cases of overdose, prolonged use or with sleep deprivation, which can independently produce psychosis. New antipsychotic drugs which act on glutamate and its receptors are currently undergoing clinical trials.
The connection between dopamine and psychosis is generally believed to be complex. While dopamine receptor D2 suppresses adenylate cyclase activity, the D1 receptor increases it. If D2-blocking drugs are administered the blocked dopamine spills over to the D1 receptors. The increased adenylate cyclase activity affects genetic expression in the nerve cell, a process which takes time. Hence antipsychotic drugs take a week or two to reduce the symptoms of psychosis. Moreover, newer and equally effective antipsychotic drugs actually block slightly less dopamine in the brain than older drugs whilst also blocking 5-HT2A receptors, suggesting the 'dopamine hypothesis' may be oversimplified.[75] Soyka and colleagues found no evidence of dopaminergic dysfunction in people with alcohol-induced psychosis[76] and Zoldan et al. reported moderately successful use of ondansetron, a 5-HT3 receptor antagonist, in the treatment of levodopa psychosis in Parkinson's disease patients.[77]
Psychiatrist David Healy has criticised pharmaceutical companies for promoting simplified biological theories of mental illness that seem to imply the primacy of pharmaceutical treatments while ignoring social and developmental factors which are known to be important influences in the aetiology of psychosis.[78]
Some theories regard many psychotic symptoms to be a problem with the perception of ownership of internally generated thoughts and experiences.[79] For example, the hallucination of hearing voices may arise from internally generated speech that is mislabeled by the psychotic person as coming from an external source.
It has been suggested that persons with bipolar disorder may have increased activity of the left hemisphere compared to the right hemisphere of the brain, while persons with schizophrenia have increased activity in the right hemisphere.[80]
Increased level of right hemisphere activation has also been found in people who have high levels of paranormal beliefs[81] and in people who report mystical experiences.[82] It also seems to be the case that people who are more creative are also more likely to show a similar pattern of brain activation.[83] Some researchers have been quick to point out that this in no way suggests that paranormal, mystical or creative experiences are in any way by themselves a symptom of mental illness, as it is still not clear what makes some such experiences beneficial and others distressing.
Neurobiology[edit]
In otherwise normal individuals, exogenous ligands can produce psychotic symptoms. NMDA receptor antagonists, such as ketamine, can produce a similar psychosis to that experienced in schizophrenia.[84]
Prolonged or high dose use of psychostimulants can alter normal functioning to be similar to the manic phase of bipolar disorder.[85] NMDA antagonists replicate some of the so-called "negative" symptoms like thought disorder in subanesthetic doses (doses insufficient to induce anesthesia), and catatonia in high doses. Psychostimulants, especially in one already prone to psychotic thinking, can cause some "positive" symptoms, such as delusional beliefs, particularly those persecutory in nature.
Diagnosis[edit]
Psychosis is first and foremost a diagnosis of exclusion.[2] So a new-onset episode of psychosis cannot be considered to be a symptom of a psychiatric disorder until other relevant and known causes of psychosis are properly excluded, or ruled out.[2] Many clinicians improperly perform, or entirely miss this step, introducing avoidable diagnostic error and misdiagnosis.[2]
An initial assessment includes a comprehensive history and physical examination by a physician, psychiatrist, psychiatric nurse practitioner or psychiatric physician assistant. Biological tests should be performed to exclude psychosis associated with or caused by substance use, medication, toxins, surgical complications, or other medical illnesses.
Delirium should be ruled out, which can be distinguished by visual hallucinations, acute onset and fluctuating level of consciousness, indicating other underlying factors which includes medical illnesses.[86][87] Excluding medical illnesses associated with psychosis is performed by using blood tests to measure:
- Thyroid-stimulating hormone to exclude hypo- or hyperthyroidism,
- Basic electrolytes and serum calcium to rule out a metabolic disturbance,
- Full blood count including ESR to rule out a systemic infection or chronic disease, and
- Serology to exclude syphilis or HIV infection.
Other investigations which may be performed include:
- EEG to exclude epilepsy, and an
- MRI or CT scan of the head to exclude brain lesions.
Because psychosis may be precipitated or exacerbated by common classes of psychiatric medications, such as antidepressants,[88][89][90] ADHD stimulant medications,[91][92][93][94][95] and sleep medications,[96][97] medication-induced psychosis should be ruled out, particularly for first-episode psychosis. Both substance- and medication-induced psychosis can be excluded to a high level of certainty, using a
- Urinalysis and a
- Full serum toxicology screening.
Because some dietary supplements may also induce psychosis or mania, but cannot be ruled out with laboratory tests, a psychotic individual's family, partner, or friends should be asked whether the patient is currently taking any dietary supplements.[98][99][100]
Common mistakes made when diagnosing people who are psychotic include:[2]
- Not properly excluding delirium,
- Not appreciating medical abnormalities (e.g., vital signs),
- Not obtaining a medical history and family history,
- Indiscriminate screening without an organizing framework,
- Missing a toxic psychosis by not screening for substances and medications
- Not asking family or others about dietary supplements,
- Premature diagnostic closure, and
- Not revisiting or questioning the initial diagnostic impression of primary psychiatric disorder.
Only after relevant and known causes of psychosis are excluded, a mental health clinician may make a psychiatric differential diagnosis using a person's family history, incorporating information from the person with psychosis, and information from family, friends, or significant others.
Types of psychosis in psychiatric disorders may be established by formal rating scales. The Brief Psychiatric Rating Scale (BPRS)[101] assesses the level of 18 symptom constructs of psychosis such as hostility, suspicion, hallucination, and grandiosity. It is based on the clinician's interview with the patient and observations of the patient's behavior over the previous 2–3 days. The patient's family can also answer questions on the behavior report. During the initial assessment and the follow-up, both positive and negative symptoms of psychosis can be assessed using the 30 item Positive and Negative Symptom Scale (PANSS).[102]
Prevention[edit]
The evidence for the effectiveness of early interventions to prevent psychosis appeared inconclusive.[103] Whilst early intervention in those with a psychotic episode might improve short term outcomes, little benefit was seen from these measures after five years.[104] However more recently there has been some evidence that cognitive behavioral therapy (CBT) may reduce the risk of becoming psychotic in those at high risk.[105][106]
Treatment[edit]
The treatment of psychosis depends on the specific diagnosis (such as schizophrenia, bipolar disorder or substance intoxication). The first line treatment for many psychotic disorders is antipsychotic medication (oral or intramuscular injection), and sometimes hospitalization is needed. However, there are significant problems associated with this class of drugs. There is evidence that they can cause brain damage including prefrontal cortex atrophy, long-lasting parkinsonian symtoms (tardive dyskinesia), and personality change.[107] Nancy Andreasen has argued for an association between antipsychotic drugs and smaller grey matter volumes independent of illness severity.[108] Furthermore, antipsychotic drugs can themselves induce psychotic symptoms if they are administered for a long time and then discontinued.[109]
There is growing evidence that cognitive behavior therapy,[110] acceptance and commitment therapy[111][112] and family therapy[113] can be effective in managing psychotic symptoms. When other treatments for psychosis are ineffective, electroconvulsive therapy or ECT (also known as shock treatment) is sometimes applied to relieve the underlying symptoms of psychosis due to depression. There is also increasing research suggesting that animal-assisted therapy can contribute to the improvement in general well-being of people with schizophrenia.[114]
Early intervention[edit]
Main article: Early intervention in psychosis
Early intervention in psychosis is on the observation that identifying and treating someone in the early stages of a psychosis can improve their longer term outcome.[115] This approach advocates the use of an intensive multi-disciplinary approach during what is known as the critical period, where intervention is the most effective, and prevents the long term morbidity associated with chronic psychotic illness.
History[edit]
The word psychosis was introduced to the psychiatric literature in 1841 by Karl Friedrich Canstatt in his work Handbuch der Medizinischen Klinik. He used it as a shorthand for 'psychic neurosis'. At that time neurosis meant any disease of the nervous system, and Canstatt was thus referring to what was thought to be a psychological manifestation of brain disease.[116] Ernst von Feuchtersleben is also widely credited as introducing the term in 1845,[117] as an alternative to insanity and mania.
The term stems from the Greek ψύχωσις (psychosis), "a giving soul or life to, animating, quickening" and that from ψυχή (psyche), "soul" and the suffix -ωσις (-osis), in this case "abnormal condition".[118][119]
The word was also used to distinguish disorders which were thought to be disorders of the mind, as opposed to "neurosis", which was thought to be a disorder of the nervous system.[120] The psychoses thus became the modern equivalent of the old notion of madness, and hence there was much debate on whether there was only one (unitary) or many forms of the new disease.[121] One type of broad usage would later be narrowed down by Koch in 1891 to the 'psychopathic inferiorities' - later renamed abnormal personalities by Schneider.[116]
The division of the major psychoses into manic depressive illness (now called bipolar disorder) and dementia praecox (now called schizophrenia) was made by Emil Kraepelin, who attempted to create a synthesis of the various mental disorders identified by 19th century psychiatrists, by grouping diseases together based on classification of common symptoms. Kraepelin used the term 'manic depressive insanity' to describe the whole spectrum of mood disorders, in a far wider sense than it is usually used today.
In Kraepelin's classification this would include 'unipolar' clinical depression, as well as bipolar disorder and other mood disorders such as cyclothymia. These are characterised by problems with mood control and the psychotic episodes appear associated with disturbances in mood, and patients will often have periods of normal functioning between psychotic episodes even without medication. Schizophrenia is characterized by psychotic episodes which appear to be unrelated to disturbances in mood, and most non-medicated patients will show signs of disturbance between psychotic episodes.
During the 1960s and 1970s, psychosis was of particular interest to counterculture critics of mainstream psychiatric practice, who argued that it may simply be another way of constructing reality and is not necessarily a sign of illness. For example, R. D. Laing argued that psychosis is a symbolic way of expressing concerns in situations where such views may be unwelcome or uncomfortable to the recipients. He went on to say that psychosis could be also seen as a transcendental experience with healing and spiritual aspects.
Arthur J. Deikman suggested use of the term "mystical psychosis" to characterize first-person accounts of psychotic experiences that are similar to reports of mystical experiences. Thomas Szasz focused on the social implications of labeling people as psychotics, a label he argues unjustly medicalises different views of reality so such unorthodox people can be controlled by society. Psychoanalysis has a detailed account of psychosis which differs markedly from that of psychiatry. Freud and Lacan outlined their perspective on the structure of psychosis in a number of works.
Since the 1970s, the introduction of a recovery approach to mental health, which has been driven mainly by people who have experienced psychosis (or whatever name is used to describe their experiences), has led to a greater awareness that mental illness is not a lifelong disability, and that there is an expectation that recovery is possible, and probable with effective support.
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Further reading[edit]
- Sims, A. (2002). Symptoms in the mind: An introduction to descriptive psychopathology (3rd edition). Edinburgh: Elsevier Science Ltd. ISBN 0-7020-2627-1
- Murray ED, Buttner N, Price BH. (2012). Depression and Psychosis in Neurological Practice. In: Neurology in Clinical Practice, 6th Edition. Bradley WG, Daroff RB, Fenichel GM, Jankovic J (eds.) Butterworth Heinemann. April 12, 2012. ISBN 1437704344 | ISBN 978-1437704341
- Williams, Paris (2012). Rethinking Madness: Towards a Paradigm Shift In Our Understanding and Treatment of Psychosis, Sky’s Edge Publishing.
- Personal accounts
- Dick, P.K. (1981) VALIS. London: Gollancz. [Semi-autobiographical] ISBN 0-679-73446-5
- Hinshaw, S.P. (2002) The Years of Silence are Past: My Father's Life with Bipolar Disorder. Cambridge: Cambridge University Press.
- Jamison, K.R. (1995) An Unquiet Mind: A Memoir of Moods and Madness. London: Picador.
ISBN 0-679-76330-9
- Schreber, Daniel Paul (2000) Memoirs of My Nervous Illness. New York: New York Review of Books. ISBN 0-940322-20-X
- McLean, R (2003) Recovered Not Cured: A Journey Through Schizophrenia. Allen & Unwin. Australia. ISBN 1-86508-974-5
- The Eden Express by Mark Vonnegut
- James Tilly Matthews
- Saks, Elyn R. (2007) The Center Cannot Hold—My Journey Through Madness. New York: Hyperion. ISBN 978-1-4013-0138-5
External links[edit]
- psychosis-bipolar.com - For persons afflicted, relatives and professionals: information, trialog, interactive therapy portal
- Understanding psychotic experiences from mental health charity Mind
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Symptoms |
- Hallucination
- Delusion
- Emotional dysregulation
- Anhedonia
- Dysphoria
- Suicidal ideation
- sleep disorder
- Psychosis
- Racing thoughts
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Spectrum |
- Bipolar disorder
- Bipolar I
- Bipolar II
- Bipolar NOS
- Cyclothymia
- Dysthymia
- Major depressive disorder
- Schizoaffective disorder
- Mania
- Mixed state
- Hypomania
- Major depressive episode
- Rapid cycling
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Treatment |
Anticonvulsants
|
- Carbamazepine
- Gabapentin
- Lamotrigine
- Oxcarbazepine
- Topiramate
- Valproic acid
- Sodium valproate
- Valproate semisodium
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Other mood stabilizers
|
- Lithium
- Lithium carbonate
- Lithium citrate
- Lithium sulfate
- Antipsychotics
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Non-pharmaceutical
|
- Clinical psychology
- Electroconvulsive therapy
- Involuntary commitment
- Light therapy
- Psychotherapy
- Transcranial magnetic stimulation
- Cognitive behavioral therapy
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dsrd (o, p, m, p, a, d, s), sysi/epon, spvo
|
proc (eval/thrp), drug (N5A/5B/5C/6A/6B/6D)
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Mental and behavioral disorders (F 290–319)
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Neurological/symptomatic
|
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Dementia
|
- Mild cognitive impairment
- Alzheimer's disease
- Vascular dementia
- Pick's disease
- Creutzfeldt–Jakob disease
- Huntington's disease
- Parkinson's disease
- AIDS dementia complex
- Frontotemporal dementia
- Sundowning
- Wandering
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Autism spectrum
|
- Autism
- Asperger syndrome
- Savant syndrome
- PDD-NOS
- High-functioning autism
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Other
|
- Delirium
- Post-concussion syndrome
- Organic brain syndrome
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Psychoactive substances, substance abuse, drug abuse and substance-related disorders
|
|
- Intoxication/Drug overdose
- Physical dependence
- Substance dependence
- Rebound effect
- Double rebound
- Withdrawal
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Schizophrenia, schizotypal and delusional
|
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Psychosis |
- Schizoaffective disorder
- Schizophreniform disorder
- Brief reactive psychosis
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Schizophrenia |
- Disorganized schizophrenia
- Delusional disorder
- Folie à deux
|
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Mood (affective)
|
|
- Mania
- Bipolar disorder
- (Bipolar I
- Bipolar II
- Cyclothymia
- Bipolar NOS)
- Depression
- (Major depressive disorder
- Dysthymia
- Seasonal affective disorder
- Atypical depression
- Melancholic depression)
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Neurotic, stress-related and somatoform
|
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Anxiety disorder
|
Phobia
|
- Agoraphobia
- Social anxiety
- Social phobia
- (Anthropophobia)
- Specific phobia
- (Claustrophobia)
- Specific social phobia
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Other
|
- Panic disorder
- Panic attack
- Generalized anxiety disorder
- OCD
- stress
- (Acute stress reaction
- PTSD)
|
|
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Adjustment disorder
|
- Adjustment disorder with depressed mood
|
|
Somatoform disorder
|
- Somatization disorder
- Body dysmorphic disorder
- Hypochondriasis
- Nosophobia
- Da Costa's syndrome
- Psychalgia
- Conversion disorder
- (Ganser syndrome
- Globus pharyngis)
- Neurasthenia
- Mass Psychogenic Illness
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|
Dissociative disorder
|
- Dissociative identity disorder
- Psychogenic amnesia
- Fugue state
- Depersonalization disorder
|
|
|
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Physiological/physical behavioral
|
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Eating disorder
|
- Anorexia nervosa
- Bulimia nervosa
- Rumination syndrome
- NOS
|
|
Nonorganic
sleep disorders
|
- (Nonorganic hypersomnia
- Nonorganic insomnia)
- Parasomnia
- (REM behavior disorder
- Night terror
- Nightmare)
|
|
Sexual
dysfunction
|
- sexual desire
- (Hypoactive sexual desire disorder
- Hypersexuality)
- sexual arousal
- (Female sexual arousal disorder)
- Erectile dysfunction
- orgasm
- (Anorgasmia
- Delayed ejaculation
- Premature ejaculation
- Sexual anhedonia)
- pain
- (Vaginismus
- Dyspareunia)
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Postnatal
|
- Postpartum depression
- Postnatal psychosis
|
|
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Adult personality and behavior
|
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Sexual and
gender identity
|
- Sexual maturation disorder
- Ego-dystonic sexual orientation
- Sexual relationship disorder
- Paraphilia
- (Voyeurism
- Fetishism)
|
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Other
|
- Personality disorder
- Impulse control disorder
- (Kleptomania
- Trichotillomania
- Pyromania
- Dermatillomania)
- Body-focused repetitive behavior
- Factitious disorder
- (Münchausen syndrome)
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Mental disorders diagnosed in childhood
|
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Intellectual disability
|
- X-Linked mental retardation
- (Lujan-Fryns syndrome)
|
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Psychological development
(developmental disorder)
|
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Emotional and behavioral
|
- ADHD
- Conduct disorder
- (ODD)
- emotional disorder
- (Separation anxiety disorder)
- social functioning
- (Selective mutism
- RAD
- DAD)
- Tic disorder
- (Tourette syndrome)
- Speech
- (Stuttering
- Cluttering)
- Movement disorder
- (Stereotypic)
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Symptoms and uncategorized
|
|
- Catatonia
- False pregnancy
- Intermittent explosive disorder
- Psychomotor agitation
- Sexual addiction
- Stereotypy
- Psychogenic non-epileptic seizures
- Klüver-Bucy syndrome
|
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|
|
|
dsrd (o, p, m, p, a, d, s), sysi/epon, spvo
|
proc (eval/thrp), drug (N5A/5B/5C/6A/6B/6D)
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