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| Organic brain syndrome |
| Classification and external resources |
| Specialty |
psychiatry |
| ICD-10 |
F06.9 |
| ICD-9-CM |
310.9 |
| DiseasesDB |
9266 |
| MedlinePlus |
001401 |
| eMedicine |
emerg/345 |
| MeSH |
D019965 |
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[edit on Wikidata]
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An organic brain syndrome (OBS), also known as an organic brain disease/disorder (OBD), an organic mental syndrome (OMS), or an organic mental disorder (OMD), is a syndrome or disorder of mental function whose cause is alleged to be known as organic (physiologic) rather than purely of the mind. These names are older and nearly obsolete general terms from psychiatry, referring to many physical disorders that cause impaired mental function.[1] They are meant to exclude psychiatric disorders (mental disorders). Originally, the term was created to distinguish physical (termed "organic") causes of mental impairment from psychiatric (termed "functional") disorders, but during the era when this distinction was drawn, not enough was known about brain science (including neuroscience, cognitive science, neuropsychology, and mind-brain correlation) for this cause based classification to be more than educated guesswork labeled with misplaced certainty, which is why it has been deemphasized in current medicine.
Acute organic brain syndrome is (by definition) a recently appearing state of mental impairment, as a result of intoxication, drug overdose, infection, pain, and many other physical problems affecting mental status. In medical contexts, "acute" means "of recent onset". As is the case with most acute disease problems, acute organic brain syndrome is often temporary, although this does not guarantee that it will not recur (happen again) or progress to become chronic, that is, long-term. A more specific medical term for the acute subset of organic brain syndromes is delirium.[2]
Chronic organic brain syndrome is long-term. For example, some forms of chronic drug or alcohol dependence can cause organic brain syndrome due to their long-lasting or permanent toxic effects on brain function.[3] Other common causes of chronic organic brain syndrome sometimes listed are the various types of dementia, which result from permanent brain damage due to strokes, Alzheimer's disease, or other damaging causes which are not reversible.
Though OBS was once a common diagnosis in the elderly, until the understanding of the various types of dementias it is related to a disease process and is not an inevitable part of aging. In some of the older literature, there was an attempt to separate organic brain syndrome from dementia, but this was related to an older world view in which dementia was thought to be a part of normal aging, and thus did not represent a special disease process. The later identification of various dementias as clear pathologies is an example of the types of pathological problems discovered to be associated with mental states, and is one of the areas which led to abandonment of all further attempts to clearly define and use OBS as a term.
Contents
- 1 Associated conditions
- 2 Symptoms
- 3 Treatment
- 4 Other names
- 5 References
- 6 External links
Associated conditions
Disorders that cause injury or damage to the brain and contribute to OBS include, but are not limited to:
- Alcoholism[4]
- Alzheimer's Disease
- Attention deficit/hyperactivity disorder[5]
- Autism[5]
- Concussion
- Encephalitis
- Epilepsy
- Fetal alcohol syndrome
- Hypoxia
- Parkinson's disease[5]
- Intoxication/overdose caused by drug abuse including alcoholism
- Sedative hypnotic dependence and drug abuse[3]
- Intracranial hemorrhage/trauma
- Korsakoff Syndrome
- Mastocytosis[6]
- Meningitis
- Psychoorganic syndrome
- Stroke/transient ischemic attack (TIA)
- Withdrawal from drugs, especially sedative hypnotics, e.g. alcohol or benzodiazepines[7][8]
Other conditions that may be related to organic brain syndrome include: clinical depression, neuroses, and psychoses, which may occur simultaneously with the OBS.
Symptoms
Symptoms of OBS vary with the disease that is responsible. However, the more common symptoms of OBS are confusion; impairment of memory, judgment, and intellectual function; and agitation. Often these symptoms are attributed to psychiatric illness, which causes a difficulty in diagnosis.
Treatment
Treatment of OBS varies with the causative disorder or disease. It is important to note that it is not a primary diagnosis and a cause needs to be sought out and treated.
Other names
- Chronic organic brain syndrome
- OBS
- Organic mental disorders
References
- ^ "MedlinePlus Medical Encyclopedia: Organic brain syndrome". Retrieved 2009-02-27.
- ^ "acute organic brain syndrome" at Dorland's Medical Dictionary
- ^ a b Luderer HJ, Schulz M, Mayer M (November 1995). "[Long-term administration of benzodiazepines--disease follow-up, sequelae, treatment. A retrospective clinical record evaluation of 194 patients]". Psychiatr Prax (in German). 22 (6): 231–4. PMID 8570753.
- ^ Martin PR, Adinoff B, Weingartner H, Mukherjee AB, Eckardt MJ (1986). "Alcoholic organic brain disease: nosology and pathophysiologic mechanisms". Prog. Neuropsychopharmacol. Biol. Psychiatry. 10 (2): 147–64. PMID 2875490. doi:10.1016/0278-5846(86)90069-2.
- ^ a b c http://apps.who.int/classifications/icd10/browse/2008/en#/F07.8
- ^ "Mixed organic brain syndrome as a manifestation of systemic mastocytosis.".
- ^ "Organic brain syndrome". MedlinePlus.
- ^ Khan A, Joyce P, Jones AV (August 1980). "Benzodiazepine withdrawal syndromes". N. Z. Med. J. 92 (665): 94–6. PMID 6107888.
External links
- AllRefer Health.com. 13 December 2006.
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Mental and behavioral disorders (F 290–319)
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Neurological/symptomatic
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Dementia
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- 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
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- Autism
- Asperger syndrome
- Savant syndrome
- PDD-NOS
- High-functioning autism
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Other
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- Delirium
- Post-concussion syndrome
- Organic brain syndrome
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Psychoactive substances, substance abuse, drug abuse and substance-related disorders
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- 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
- Paranoid schizophrenia
- Simple-type schizophrenia
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| Delusional disorders |
- Delusional disorder
- Folie à deux
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Mood (affective)
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- 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
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Phobia
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- Agoraphobia
- Social anxiety
- Social phobia
- (Anthropophobia)
- Specific phobia
- (Claustrophobia)
- Specific social phobia
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Other
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- Panic disorder
- Panic attack
- Generalized anxiety disorder
- OCD
- stress
- (Acute stress reaction
- PTSD)
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Adjustment disorder
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- Adjustment disorder with depressed mood
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Somatic symptom
disorder
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- 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
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- Dissociative identity disorder
- Psychogenic amnesia
- Fugue state
- Depersonalization disorder
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Physiological/physical behavioral
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Eating disorder
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- Anorexia nervosa
- Bulimia nervosa
- Rumination syndrome
- NOS
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Nonorganic
sleep disorders
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- (Nonorganic hypersomnia
- Nonorganic insomnia)
- Parasomnia
- (REM sleep behavior disorder
- Night terror
- Nightmare)
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Sexual
dysfunction
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- 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
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- Postpartum depression
- Postpartum psychosis
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Adult personality and behavior
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Gender dysphoria
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- Sexual maturation disorder
- Ego-dystonic sexual orientation
- Sexual relationship disorder
- Paraphilia
- (Voyeurism
- Fetishism)
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Other
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- Personality disorder
- Impulse control disorder
- (Kleptomania
- Trichotillomania
- Pyromania
- Dermatillomania)
- Factitious disorder
- (Munchausen syndrome)
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Disorders typically diagnosed in childhood
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Intellectual disability
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- X-linked intellectual disability
- (Lujan–Fryns syndrome)
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Psychological development
(developmental disabilities)
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- Specific
- Pervasive
- Autism spectrum
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Emotional and behavioral
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- ADHD
- Conduct disorder
- (ODD)
- Emotional/behavioral disorder
- (Separation anxiety disorder)
- social functioning
- (Selective mutism
- RAD
- DAD)
- Tic disorder
- (Tourette syndrome)
- Speech
- (Stuttering
- Cluttering)
- Movement disorders
- (Stereotypic)
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Symptoms and uncategorized
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- Catatonia
- False pregnancy
- Intermittent explosive disorder
- Psychomotor agitation
- Stereotypy
- Psychogenic non-epileptic seizures
- Klüver–Bucy syndrome
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