腹側皮質脊髄路
WordNet
- a brief treatise on a subject of interest; published in the form of a booklet (同)pamphlet
- an extended area of land (同)piece of land, piece of ground, parcel of land, parcel
- a system of body parts that together serve some particular purpose
- a drawing created by superimposing a semitransparent sheet of paper on the original image and copying on it the lines of the original image (同)trace
- the act of drawing a plan or diagram or outline
- the discovery and description of the course of development of something; "the tracing of genealogies"
- toward or on or near the belly (front of a primate or lower surface of a lower animal); "the ventral aspect of the human body"; "the liver is somewhat ventral in position"; "ventral (or pelvic) fins correspond to the hind limbs of a quadruped"
PrepTutorEJDIC
- 広大な土地(地域),(土地・海・空などの)広がり《+of+名》 / (器官の)管,(神経の)索
- (おもに宗教・政治などの宣伝用の)小冊子,パンフレット
- 跡を追うこと,追跡;透写,複写 / 〈C〉 / 透写(複写)によってできたもの(地図・図案など),透写図
- 腹の,腹部の
Wikipedia preview
出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2017/03/13 01:10:57」(JST)
[Wiki en表示]
| Anterior corticospinal tract |
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Anterior corticospinal tract seen in red at bottom center in figure (text tag found at upper-left).
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Decussation of pyramids. Scheme showing passage of various fasciculi from medulla spinalis to medulla oblongata. a. Pons. b. Medulla oblongata. c. Decussation of the pyramids. d. Section of cervical part of medulla spinalis. 1. Anterior cerebrospinal fasciculus (in red). 2. Lateral cerebrospinal fasciculus (in red). 3. Sensory tract (fasciculi gracilis et cuneatus) (in blue). 3’. Gracile and cuneate nuclei. 4. Antero-lateral proper fasciculus (in dotted line). 5. Pyramid. 6. Lemniscus. 7. Medial longitudinal fasciculus. 8. Ventral spinocerebellar fasciculus (in blue). 9. Dorsal spinocerebellar fasciculus (in yellow).
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| Details |
| Identifiers |
| Latin |
tractus corticospinalis anterior, fasciculus cerebrospinalis anterior |
| NeuroLex ID |
Ventral corticospinal tract |
Dorlands
/Elsevier |
t_15/12816937 |
| TA |
A14.1.02.205 |
| FMA |
73959 |
| Anatomical terminology
[edit on Wikidata]
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The anterior corticospinal tract (also called the ventral corticospinal tract, "Bundle of Turk", medial corticospinal tract, direct pyramidal tract, or anterior cerebrospinal fasciculus) is a small bundle of descending fibers that connect the cerebral cortex to the spinal cord. Descending tracts are pathways by which motor signals are sent from the brain to lower motor neurons which then directly innervate muscle to produce movement. The anterior corticospinal tract is usually small, varying inversely in size with the lateral corticospinal tract, which is the main part of the corticospinal tract.
It lies close to the anterior median fissure, and is present only in the upper part of the medulla spinalis; gradually diminishing in size as it descends, it ends about the middle of the thoracic region.
It consists of descending fibers that arise from cells in the motor area of the ipsilateral cerebral hemisphere. The impulse travels from these upper motor neurons (located in the pre-central gyrus of the brain) through the anterior column. In contrast to the fibers for the lateral corticospinal tract, the fibers for the anterior corticospinal tract do not decussate at the level of the medulla oblongata, although they do cross over in the spinal level they innervate.[1] They then synapse at the anterior horn with the lower motor neuron which then synapses with the target muscle at the motor end plate. In contrast to the lateral corticospinal tract which controls the movement of the limbs, the anterior corticospinal tract controls the movements of axial muscles (of the trunk).
A few of its fibers pass to the lateral column of the same side and to the gray matter at the base of the posterior column.[citation needed]
Additional images
References
- ^ http://nervsystemet.se/nsd/structure_718
This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)
- Saladin, Kenneth S. "The Spinal Cord, Spinal Nerves, and Somatic Reflexes." Anatomy & Physiology: The Unity of Form and Function. 6th ed. New York: McGraw-Hill, 2012. N. pag. Print.
External links
- hier-799 at NeuroNames
- 745209857 at GPnotebook
- Overview at thebrain.mcgill.ca
- http://teachmeanatomy.info/neuro/pathways/descending-tracts-motor/
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Anatomy of the medulla
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| Grey matter |
| Cranial nuclei |
| afferent: |
- Solitary nucleus
- tract
- Dorsal respiratory group
- Gustatory nucleus
- Vestibular nuclei
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| efferent: |
- Hypoglossal nucleus
- Nucleus ambiguus
- Dorsal nucleus of vagus nerve
- Inferior salivatory nucleus
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| Dorsal |
- Gracile nucleus
- Cuneate nucleus
- Accessory cuneate nucleus
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| Ventral |
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- Ventral respiratory group
- Arcuate nucleus of medulla
- Rostral ventromedial medulla
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| White matter |
| Dorsal |
- Sensory
- Sensory decussation
- Medial lemniscus
- Juxtarestiform body
- Ascending dorsal longitudinal fasciculus
- Medial longitudinal fasciculus
- Motor
- Descending dorsal longitudinal fasciculus
- Medial longitudinal fasciculus
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| Ventral |
- Descending tracts
- Olivocerebellar tract
- Rubro-olivary tract
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| Surface |
| Front |
- Pyramid
- decussation
- Anterior median fissure
- Anterolateral sulcus
- Olive
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| Back |
- Posterior median sulcus
- Posterolateral sulcus
- Area postrema
- Vagal trigone
- Hypoglossal trigone
- Medial eminence
- Inferior cerebellar peduncle
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| Grey |
- Reticular formation
- Gigantocellular
- Parvocellular
- Ventral
- Lateral
- Paramedian
- Raphe nuclei
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The spinal cord
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| General features |
- Cervical enlargement
- Lumbar enlargement
- Conus medullaris
- Filum terminale
- Cauda equina
- Meninges
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| Grey matter |
| Posterior grey column |
- Marginal nucleus
- Substantia gelatinosa of Rolando
- Nucleus proprius
- Spinal lamina V
- Spinal lamina VI
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| Lateral grey column |
- Intermediolateral nucleus
- Posterior thoracic nucleus
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| Anterior grey column |
- Interneuron
- Alpha motor neuron
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| Other |
- Rexed laminae
- Central gelatinous substance
- Gray commissure
- Central canal
- Terminal ventricle
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| White matter |
| Sensory |
| Posterior |
- Posterior column-medial lemniscus pathway:
- Gracile
- Cuneate
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| Lateral: |
- Spinocerebellar
- Spinothalamic
- Posterolateral
- Spinotectal
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- Spinoreticular tract
- Spino-olivary tract
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| Motor |
| Lateral |
- Corticospinal
- Extrapyramidal
- Rubrospinal
- Olivospinal
- Raphespinal
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| Anterior |
- Corticospinal
- Extrapyramidal
- Vestibulospinal
- Reticulospinal
- Tectospinal
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| Both |
- Anterior white commissure
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| External features |
- Ventral
- Anterior median fissure
- Anterolateral sulcus
- Dorsal
- Posterior median sulcus
- Posterolateral sulcus
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Brain and spinal cord: neural tracts and fasciculi
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Sensory/
ascending |
| PCML |
| 1°: |
- Pacinian corpuscle/Meissner's corpuscle → Posterior column (Gracile fasciculus/Cuneate fasciculus) → Gracile nucleus/Cuneate nucleus
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| 2°: |
- → sensory decussation/arcuate fibers (Posterior external arcuate fibers, Internal arcuate fibers) → Medial lemniscus/Trigeminal lemniscus → Thalamus (VPL, VPM)
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| 3°: |
- → Posterior limb of internal capsule → Postcentral gyrus
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Anterolateral/
pain |
| Fast/lateral |
- 1° (Free nerve ending → A delta fiber) → 2° (Anterior white commissure → Lateral and Anterior Spinothalamic tract → Spinal lemniscus → VPL of Thalamus) → 3° (Postcentral gyrus) → 4° (Posterior parietal cortex)
2° (Spinomesencephalic tract → Superior colliculus of Midbrain tectum)
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| Slow/medial |
- 1° (Group C nerve fiber → Spinoreticular tract → Reticular formation) → 2° (MD of Thalamus) → 3° (Cingulate cortex)
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Motor/
descending |
| Pyramidal |
- flexion: Primary motor cortex → Posterior limb of internal capsule → Decussation of pyramids → Corticospinal tract (Lateral, Anterior) → Neuromuscular junction
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| Extrapyramidal |
| flexion: |
- Primary motor cortex → Genu of internal capsule → Corticobulbar tract → Facial motor nucleus → Facial muscles
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| flexion: |
- Red nucleus → Rubrospinal tract
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| extension: |
- Vestibulocerebellum → Vestibular nuclei → Vestibulospinal tract
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| extension: |
- Vestibulocerebellum → Reticular formation → Reticulospinal tract
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- Midbrain tectum → Tectospinal tract → muscles of neck
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| Basal ganglia |
| direct: |
1° (Motor cortex → Striatum) → 2° (GPi) → 3° (Lenticular fasciculus/Ansa lenticularis → Thalamic fasciculus → VL of Thalamus) → 4° (Thalamocortical radiations → Supplementary motor area) → 5° (Motor cortex)
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| indirect: |
1° (Motor cortex → Striatum) → 2° (GPe) → 3° (Subthalamic fasciculus → Subthalamic nucleus) → 4° (Subthalamic fasciculus → GPi) → 5° (Lenticular fasciculus/Ansa lenticularis → Thalamic fasciculus → VL of Thalamus) → 6° (Thalamocortical radiations → Supplementary motor area) → 7° (Motor cortex)
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| nigrostriatal pathway: |
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| Cerebellar |
| Afferent |
- Vestibular nuclei → Vestibulocerebellar tract → ICP → Cerebellum → Granule cell
- Pontine nuclei → Pontocerebellar fibers → MCP → Deep cerebellar nuclei → Granule cell
- Inferior olivary nucleus → Olivocerebellar tract → ICP → Hemisphere → Purkinje cell → Deep cerebellar nuclei
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| Efferent |
- Dentate nucleus in Lateral hemisphere/pontocerebellum → SCP → Dentatothalamic tract → Thalamus (VL) → Motor cortex
- Interposed nucleus in Intermediate hemisphere/spinocerebellum → SCP → Reticular formation, or → Cerebellothalamic tract → Red nucleus → Thalamus (VL) → Motor cortex
- Fastigial nucleus in Flocculonodular lobe/vestibulocerebellum → Vestibulocerebellar tract → Vestibular nuclei
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Bidirectional:
Spinocerebellar |
Unconscious
proprioception |
- lower limb → 1° (muscle spindles → DRG) → 2° (Posterior thoracic nucleus → Dorsal/posterior spinocerebellar tract → ICP → Cerebellar vermis)
- upper limb → 1° (muscle spindles → DRG) → 2° (Accessory cuneate nucleus → Cuneocerebellar tract → ICP → Anterior lobe of cerebellum)
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| Reflex arc |
- lower limb → 1° (Golgi tendon organ) → 2° (Ventral/anterior spinocerebellar tract→ SCP → Cerebellar vermis)
- upper limb → 1° (Golgi tendon organ) → 2° (Rostral spinocerebellar tract → ICP → Cerebellum)
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UpToDate Contents
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Related Links
- This video is a project in ANA225-Neurology presented by Dental students Rangsit university ,Thailand
- Ventral Corticospinal Tract Hierarchy level in atlas is 5: 4 superstructures include it. abbreviation: vcsp Details? Abbreviation vcsp Species Human Description of part No description provided. The original URL is Part type fiber tract ...
★リンクテーブル★
[★]
- 英
- ventral corticospinal tract
- 関
- 下行性伝導路、上行性伝導路
- 関
- 錐体前索路
[★]
- 関
- abdomen、abdominal、abdominis、belly、ventrad、ventrally
[★]
- 関
- chase、follow up、follow-up、pursue、pursuit、trace
[★]
- 関
- tractus