楔状束
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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2017/05/24 22:12:20」(JST)
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| 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
A14.1.04.108 |
| 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
- 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
- Gamma 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
- TAR DNA-binding protein 43 pathology in a case clinically diagnosed with facial-onset sensory and motor neuronopathy syndrome: an autopsied case report and a review of the literature.
- Sonoda K1, Sasaki K, Tateishi T, Yamasaki R, Hayashi S, Sakae N, Ohyagi Y, Iwaki T, Kira J.
- Journal of the neurological sciences.J Neurol Sci.2013 Sep 15;332(1-2):148-53. doi: 10.1016/j.jns.2013.06.027. Epub 2013 Jul 9.
- We report an autopsy case of a 48-year-old female clinically diagnosed with facial-onset sensory and motor neuronopathy (FOSMN) syndrome with TAR DNA-binding protein 43 (TDP-43) pathology. She developed paresthesia involving her whole face, right upper extremity and the right side of her upper trunk
- PMID 23849263
- 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.
- Leptin receptors have been identified within the nucleus of the solitary tract (NTS) and leptin injections into the caudal NTS inhibit the baroreceptor reflex. However, whether plasma leptin alters the discharge of NTS neurons mediating aortic baroreceptor reflex activity is not known. A series of e
- PMID 23792336
- Analysis of ascending spinal tract degeneration in cervical spondylotic myelopathy using 3D anisotropy contrast single-shot echo planar imaging on a 3.0-T system.
- Urakawa T1, Matsuzawa H, Suzuki Y, Endo N, Kwee IL, Nakada T.
- Journal of neurosurgery. Spine.J Neurosurg Spine.2011 Dec;15(6):648-53. doi: 10.3171/2011.7.SPINE10843. Epub 2011 Sep 9.
- OBJECT: The authors assessed the role of 3D anisotropy contrast (3DAC) in evaluating specific ascending tract degeneration in patients with cervical spondylotic myelopathy (CSM).METHODS: The authors studied 10 patients (2 women, 8 men; mean age 59.8 ± 14.6 years) with CSM and spinal cord compressio
- PMID 21905771
Japanese Journal
- 症例報告 広汎型筋萎縮性側索硬化症に合併した,楔状束に対称性病変を呈する空胞性脊髄症
- ネコ後根線維の脊椎および延髄への投射について 第3報
Related Links
- Definition of fasciculus cuneatus of spinal cord in the Medical Dictionary. fasciculus cuneatus of spinal cord explanation. Information about fasciculus cuneatus of spinal cord in Free online English dictionary. What is fasciculus ...
- cuneate fasciculus n. The larger lateral subdivision of the posterior funiculus of the spinal cord. Also called cuneate funiculus. cu·ne·ate fas·cic·u·lus [TA] the larger lateral subdivision of the posterior funiculus. Synonym(s): fasciculus ...
★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.
[★]
束
- 関
- bundle、fascicle、fasciculi