Dorsal spinocerebellar tract

Dorsal spinocerebellar tract: Dorsal spinocerebellar tract

Posterior spinocerebellar tract is labeled in blue at right.

Diagram of the principal fasciculi of the spinal cord. (Dorsal spinocerebellar fasciculus visible at center left.)

Latin tractus spinocerebellaris posterior, tractus spinocerebellaris dorsalis

Gray's subject #185 761

The dorsal spinocerebellar tract (posterior spinocerebellar tract, Flechsig's fasciculus, Flechsig's tract) conveys inconscient proprioceptive information from the body to the cerebellum.^[1]

It is part of the somatosensory system and runs in parallel with the ventral spinocerebellar tract. Proprioceptive information is taken to the spinal cord via central processes of dorsal root ganglia (first order neurons). These central processes travel through the dorsal horn where they synapse with second order neurons of Clarke's nucleus. Axon fibers from Clarke's Nucleus convey this proprioceptive information in the spinal cord in the peripheral region of the posteriolateral funiculus ipsilaterally until it reaches the cerebellum, where unconscious proprioceptive information is processed.

This tract involves two neurons and ends up on the same side of the body.

External links

NeuroNames hier-804

References

^ Adel K. Afifi Functional Neuroanatomy pag.51 ISBN 970-10-5504-7

v · d · eAnatomy of torso (primarily): the spinal cord (TA 14.1.02, GA 9.749)

External, dorsal
Posterior median sulcus · Posterolateral sulcus

Grey matter/
Rexed laminae

I–VI: Posterior horn

I: Marginal nucleus · II: Substantia gelatinosa of Rolando · III+IV: Nucleus proprius · Spinal lamina V · Spinal lamina VI

VII: Lateral horn

Intermediolateral nucleus · Posterior thoracic nucleus

VIII–IX: Anterior horn

Interneuron · Alpha motor neuron (Onuf's nucleus)

X: Other

Central gelatinous substance · Gray commissure
Central canal

White matter

somatic/
ascending
(blue)

Posterior/PCML: touch: Gracile · Cuneate

Lateral: proprioception: Spinocerebellar (Dorsal, Ventral) · pain/temp: Spinothalamic (Lateral, Anterior) · Posterolateral (Lissauer) · Spinotectal
Spinoreticular tract · Spino-olivary tract

motor/
descending
(red)

Lateral: Corticospinal (Lateral) · Ep (Rubrospinal, Olivospinal)
Anterior: Corticospinal (Anterior) · Ep (Vestibulospinal, Reticulospinal, Tectospinal)

both

Anterior white commissure

External, ventral
Anterior median fissure · Anterolateral sulcus

External, general
Cervical enlargement · Lumbar enlargement · Conus medullaris · Filum terminale · Cauda equina

M: CNS

anat(n/s/m/p/4/e/b/d/c/a/f/l/g)/phys/devp

noco(m/d/e/h/v/s)/cong/tumr, sysi/epon, injr

proc, drug(N1A/2AB/C/3/4/7A/B/C/D)

v · d · eHuman brain: rhombencephalon, myelencephalon: medulla (TA A14.1.04, GA 9.767)

Dorsal

Surface

Posterior median sulcus · Posterolateral sulcus · Area postrema · Vagal trigone · Hypoglossal trigone · Medial eminence

Grey: Cranial nuclei

afferent: GVA: VII,IX,X: Solitary/tract/Dorsal respiratory group · SVA: Gustatory nucleus · GSA: VIII-v (Lateral, Medial, Inferior)
efferent: GSE: XII · GVE: IX,X,XI: Ambiguus · SVE: X: Dorsal · IX: Inferior salivatory nucleus

Grey: other

Gracile nucleus · Cuneate nucleus · Accessory cuneate nucleus

White: Sensory/ascending

Sensory decussation · Medial lemniscus · Inferior cerebellar peduncle (Juxtarestiform body) · Ascending dorsal longitudinal fasciculus · MLF, III, IV and VI

White: Motor/descending

Descending dorsal longitudinal fasciculus · MLF, III, IV and VI

Ventral

White: Motor/descending

Motor decussation · Olivocerebellar tract · Rubro-olivary tract

Grey matter

Ventral respiratory group · Arcuate nucleus of medulla · Inferior olivary nucleus · Rostral ventromedial medulla

Surface

Anterior median fissure · Anterolateral sulcus · Olive · Pyramid

Grey: Raphe/
reticular
Reticular formation (Gigantocellular, Parvocellular, Ventral, Lateral, Paramedian) · Raphe nuclei (Obscurus, Magnus, Pallidus)

M: CNS

anat(n/s/m/p/4/e/b/d/c/a/f/l/g)/phys/devp

noco(m/d/e/h/v/s)/cong/tumr, sysi/epon, injr

proc, drug(N1A/2AB/C/3/4/7A/B/C/D)

v · d · eHuman brain, rhombencephalon, metencephalon: cerebellum (TA 14.1.07, GA 9.788)

Surface anatomy

Lobes

Anterior lobe · Posterior lobe (Horizontal fissure) · Flocculonodular lobe (Flocculus, Nodule)
Primary fissure

Medial/lateral

Vermis: anterior (Central lobule, Culmen, Lingula) · posterior (Folium, Tuber, Uvula) · Vallecula of cerebellum
Hemisphere: anterior (Alar central lobule) · posterior (Biventer lobule, Cerebellar tonsil)

Grey matter

Deep cerebellar nuclei

Dentate · interposed (Emboliform, Globose) · Fastigial

Cerebellar cortex

Molecular layer (Stellate cell, Basket cell)

Purkinje cell layer (Purkinje cell, Bergmann glia cell = Golgi epithelial cell)

Granule cell layer (Golgi cell, Granule cell, Unipolar brush cell)
Fibers: Mossy fibers · Climbing fiber · Parallel fiber

White matter

Internal

Arbor vitae

Peduncles

Inferior (medulla): Dorsal spinocerebellar tract · Olivocerebellar tract · Cuneocerebellar tract · Juxtarestiform body (Vestibulocerebellar tract)

Middle (pons): Pontocerebellar fibers
Superior (midbrain): Ventral spinocerebellar tract · Dentatothalamic tract · Trigeminocerebellar fibers

M: CNS

anat(n/s/m/p/4/e/b/d/c/a/f/l/g)/phys/devp

noco(m/d/e/h/v/s)/cong/tumr, sysi/epon, injr

proc, drug(N1A/2AB/C/3/4/7A/B/C/D)

v · d · eBrain and spinal cord: neural tracts and fasciculi

Sensory/
ascending

PCML

1°: Pacinian corpuscle/Meissner's corpuscle → Gracile fasciculus/Cuneate fasciculus → Gracile nucleus/Cuneate nucleus

2°: → sensory decussation/arcuate fibers (Posterior external arcuate fibers, Internal arcuate fibers) → Medial lemniscus/Trigeminal lemniscus → Thalamus (VPL, VPM)
3°: → Posterior limb of internal capsule → Postcentral gyrus

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° (Spinotectal tract → Superior colliculus of Midbrain tectum)

Slow/medial

1° (Group C nerve fiber → Spinoreticular tract → Reticular formation) → 2° (MD of Thalamus) → 3° (Cingulate cortex)

Motor/
descending

Pyramidal

flexion: Primary motor cortex → Posterior limb of internal capsule → Decussation of pyramids → Corticospinal tract (Lateral, Anterior) → Neuromuscular junction

Extrapyramidal

flexion: Primary motor cortex → Genu of internal capsule → Corticobulbar tract → Facial motor nucleus → Facial muscles

flexion: Red nucleus → Rubrospinal tract

extension: Vestibulocerebellum → Vestibular nuclei → Vestibulospinal tract

extension: Vestibulocerebellum → Reticular formation → Reticulospinal tract
Midbrain tectum → Tectospinal tract → muscles of neck

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)

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)
nigrostriatal pathway: Pars compacta → Striatum

Cerebellar

Afferent

Vestibular nucleus → 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

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 nucleus

Bidirectional:
Spinocerebellar

Unc. prop.

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)

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)

M: CNS

anat(n/s/m/p/4/e/b/d/c/a/f/l/g)/phys/devp

noco(m/d/e/h/v/s)/cong/tumr, sysi/epon, injr

proc, drug(N1A/2AB/C/3/4/7A/B/C/D)

M: PNS

anat(h/r/t/c/b/l/s/a)/phys(r)/devp/prot/nttr/nttm/ntrp

noco/auto/cong/tumr, sysi/epon, injr

proc, drug(N1B)

Categories:
Central nervous system pathways
Neuroscience stubs

Dorsal spinocerebellar tract

Posterior spinocerebellar tract is labeled in blue at right.

Diagram of the principal fasciculi of the spinal cord. (Dorsal spinocerebellar fasciculus visible at center left.)
Latin	tractus spinocerebellaris posterior, tractus spinocerebellaris dorsalis
Gray's	subject #185 761

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Look at other dictionaries:

dorsal spinocerebellar tract — n SPINOCEREBELLAR TRACT (a) … Medical dictionary
spinocerebellar tract — n any of four nerve tracts which pass from the spinal cord to the cerebellum and of which two are situated on each side external to the crossed corticospinal tracts: a) a posterior tract on each side that arises from cells in the nucleus dorsalis … Medical dictionary
spinocerebellar tract direct — spinocerebellar tract, dorsal, spinocerebellar tract, posterior tractus spinocerebellaris posterior … Medical dictionary
Dorsal trigeminal tract — Brain: Dorsal trigeminal tract NeuroNames hier 602 NeuroLex ID birnlex 1718 The dorsal trigeminal tract (dorsal trigeminothalamic tract, or lemniscus) is a tract which receives signals from … Wikipedia
Ventral spinocerebellar tract — Infobox Anatomy Name = PAGENAME Latin = tractus spinocerebellaris anterior, tractus spinocerebellaris ventralis GraySubject = 185 GrayPage = 761 Caption = Ventral spinocerebellar tract is 4b, in blue at right. Caption2 = Diagram of the principal… … Wikipedia
Spinocerebellar tract — Infobox Brain Name = PAGENAME Latin = GraySubject = 185 GrayPage = 761 Caption = Spinocerebellar tract is #4, in blue at right. Caption2 = IsPartOf = Components = Artery = Vein = BrainInfoType = ancil BrainInfoNumber = 2137625602 MeshName =… … Wikipedia
Dorsal nucleus of Clarke — Infobox Brain Name = PAGENAME Latin = nucleus thoracicus posterior GraySubject = GrayPage = Caption = Caption2 = IsPartOf = Components = Artery = Vein = BrainInfoType = ancil BrainInfoNumber = 948 MeshName = MeshNumber = DorlandsPre = n 11… … Wikipedia
tract — An elongated area, e.g., path, track, way. SEE ALSO: fascicle. SYN: tractus. [L. tractus, a drawing out] alimentary t. SYN: digestive t.. anterior corticospinal t. uncrossed fibers forming a small bundle in the anterior funiculus of the … Medical dictionary
Dorsal longitudinal fasciculus — Brain: Dorsal longitudinal fasciculus Latin fasciculus longitudinalis posterior; fasciculus longitudinalis dorsalis NeuroLex ID birnlex 986 The dorsal longitudinal fasciculus (DLF) (not to be confused with the medial longitudinal fasciculus, nor… … Wikipedia
Olivocerebellar tract — Brain: Olivocerebellar tract Transverse section of medulla oblongata below the middle of the olive. (Cerebello olivary fibers visible at center right.) Latin t. olivocerebellaris NeuroNames … Wikipedia

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Dorsal spinocerebellar tract

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