楔状束
WordNet
- (of a leaf shape) narrowly triangular, wider at the apex and tapering toward the base (同)wedge-shaped
Wikipedia preview
出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2016/09/01 07:46:17」(JST)
[Wiki en表示]
| Cuneate fasciculus |
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Cuneate fasciculus is labeled in blue at upper right.
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Diagram of the principal fasciculi of the spinal cord.
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| Details |
| Identifiers |
| Latin |
fasciculus cuneatus medullae spinalis |
Dorlands
/Elsevier |
f_03/12355858 |
| TA |
A14.1.02.244
A14.1.04.016 |
| FMA |
73941 |
| Anatomical terminology
[edit on Wikidata]
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The cuneate fasciculus, fasciculus cuneatus (tract of Burdach, named for Karl Friedrich Burdach) is a tract of nerves in the spinal cord that primarily transmits information from the arms. It is part of the posterior column-medial lemniscus pathway.
Contents
- 1 Structure
- 2 Function
- 3 Additional images
- 4 See also
- 5 External links
Structure
The fasciculus cuneatus is triangular on transverse section, and lies between the fasciculus gracilis and the posterior column, its base corresponding with the surface of the medulla spinalis.
Its fibers, larger than those of the fasciculus gracilis, are mostly derived from the same source, viz., the posterior nerve roots.
Some ascend for only a short distance in the tract, and, entering the gray matter, come into close relationship with the cells of the dorsal nucleus, while others can be traced as far as the medulla oblongata, where they end in the gracile nucleus and cuneate nucleus.
Function
The fasciculus cuneatus transmits fine touch, fine pressure, vibration, and proprioception information from spinal nerves located in dermatomes C1 through T6.
Neurons
The fasciculus cuneatus tract is composed of first-order neurons that synapse onto second-order neurons in the brain stem.
The second-order neurons decussate in the brainstem and continue on to the thalamus where the second-order neurons synapse onto third-order neurons.
The third-order neurons carry the received signals to the somatosensory cortex, where the signals, in the form of action potentials, are interpreted.
Additional images
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Superficial dissection of brain-stem. Lateral view.
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Superior terminations of the posterior fasciculi of the medulla spinalis.
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Upper part of medulla spinalis and hind- and mid-brains; posterior aspect, exposed in situ.
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Fourth ventricle. Posterior view. Deep dissection.
See also
- Fasciculus gracilis
- Dorsal columns
External links
- Illustration and text: sc97/text/p1/Pathway.htm at the University of Wisconsin-Madison Medical school
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The spinal cord
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| General features |
- Cervical enlargement
- Lumbar enlargement
- Conus medullaris
- Filum terminale
- Cauda equina
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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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English Journal
- Spinal cord neuron inputs to the cuneate nucleus that partially survive dorsal column lesions: A pathway that could contribute to recovery after spinal cord injury.
- Liao CC1, DiCarlo GE1, Gharbawie OA1, Qi HX1, Kaas JH1.
- The Journal of comparative neurology.J Comp Neurol.2015 Oct 1;523(14):2138-60. doi: 10.1002/cne.23783. Epub 2015 Jun 2.
- PMID 25845707
- Patterns of cortical reorganization in the adult marmoset after a cervical spinal cord injury.
- Bowes C1, Burish M, Cerkevich C, Kaas J.
- The Journal of comparative neurology.J Comp Neurol.2013 Oct 15;521(15):3451-63. doi: 10.1002/cne.23360.
- PMID 23681952
- Plasma leptin inhibits the response of nucleus of the solitary tract neurons to aortic baroreceptor stimulation.
- Ciriello J1.
- Brain research bulletin.Brain Res Bull.2013 Aug;97:96-103. doi: 10.1016/j.brainresbull.2013.05.008. Epub 2013 Jun 20.
- PMID 23792336
Japanese Journal
- MRI上亜急性連合性脊髄変性症類似の後索病変を呈したSjögren症候群の1例
- 本郷 悠,尾上 祐行,竹島 慎一,鎌倉 惠子,海田 賢一
- 臨床神経学 52(7), 491-494, 2012
- 症例は67歳男性である．60歳時にANCA関連血管炎・Sjögren症候群（SjS）を発症後，上肢の感覚性運動失調が出現した．受診時，両上肢の感覚性運動失調をみとめるが下肢の深部感覚は保たれていた．軽度の大球性高色素性貧血があり頸髄MRIで楔状束に限局した病変をみとめた．血清ビタミンB12，葉酸，血漿メチルマロン酸，血清/尿中ホモシステインは正常範囲内で，ビタミンB12筋注も無効だった．本例の深部 …
- NAID 130004505279
- 頚髄症患者における上肢後索機能の客観的な評価法の開発
- 芥川 知彰,谷 俊一,石田 健司,谷口 愼一郎,井上 真輔,池本 竜則
- 中部日本整形外科災害外科学会雑誌 51(3), 523-524, 2008-05-01
- NAID 10024123985
- 頚部脊髄症における上肢後索機能検査法の開発とその有用性の検討
- 芥川 知彰,谷 俊一,谷口 愼一郎,永野 靖典,池本 竜則,石田 健司
- 日本脊椎脊髄病学会雑誌 = The journal of the Japan Spine Research Society 19(1), 6, 2008-03-20
- NAID 10025188451
Related Links
- The fasciculus cuneatus (tract of Burdach, named for Karl Friedrich Burdach) is a tract of nerves in the spinal cord that primarily transmits information from the arms . It is part of the posterior column-medial lemniscus pathway.
★リンクテーブル★
[★]
[★]
- 英
- cuneate fasciculus (B,KL), CF
- ラ
- fasciculus cuneatus
- 同
- ブルダッハ索、ブルダッハ束,Burdach束, Burdach's columns
- 関
- 薄束
Henry Gray (1825-1861). Anatomy of the Human Body. 1918.
[★]
- 関
- cuneiform、sphenoid、wedge shape、wedge-shaped
[★]
束
- 関
- bundle、fascicle、fasciculi