Vestibulospinal tract

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Vestibulospinal tract
Vestibulospinal tract is 2c, in red at bottom center.
Diagram of the principal fasciculi of the spinal cord. (Vestibulospinal fasciculus labeled at bottom right.)
Latin tractus vestibulospinalis
Gray's subject #185 760
Dorlands/Elsevier t_15/12817329

The vestibulospinal tract is one of the descending spinal tracts of the ventromedial pathway. It originates from the vestibular nuclei of the medulla, which conducts information from the vestibular labyrinth in the inner ear.

Motion of fluid in the vestibular labyrinth activates hair cells that signal the vestibular nuclei via cranial nerve VIII.

The medial part of the vestibulospinal tract project bilaterally down the spinal cord and triggers the cervical spinal circuits, controlling a right position of the head and neck.

The lateral part of the vestibulospinal tract projects ipsilateral down to the lumbar region. There it helps to maintain an upright and balanced posture by stimulating extensor motor neurons in the legs.

 This neuroscience article is a stub. You can help Wikipedia by expanding it.
v • d • e
Anatomy of torso (primarily): the spinal cord
Spinal nerve Dorsal (Root, Ganglion, Ramus) • Ventral (Root, Ramus) • Sympathetic trunk • rami communicantes (Gray, White)
Gray matter/Rexed laminae Posterior horn (Column of Clarke, Substantia gelatinosa of Rolando, Nucleus proprius) • Lateral horn • Anterior horn • Central canal/Substantia gelatinosa centralis
White matter: somatic/ascending (blue)
White matter: motor/descending (red)

Lateral: Corticospinal (Lateral) • Ep (Rubrospinal, Olivospinal)

Anterior: Corticospinal (Anterior) • Ep (Vestibulospinal, Tectospinal, Reticulospinal)
Layers Epidural space • Dura mater • Subdural space • Arachnoid mater • Subarachnoid space • Pia mater
Other structures Denticulate ligaments • Conus medullaris • Cauda equina • Filum terminale • Cervical enlargement • Lumbar enlargement • Anterior median fissure
v • d • e
Brain: rhombencephalon (hindbrain)
Myelencephalon/medulla

anterior/ventral: Arcuate nucleus of medulla • Pyramid (Decussation) • Olivary body • Inferior olivary nucleus • Anterior median fissure • Ventral respiratory group

posterior/dorsal: VII,IX,X: Solitary/tract • XII, X: Dorsal • IX,X,XI: Ambiguus • IX: Inferior salivatory nucleus • Gracile nucleus/Cuneate nucleus/Accessory cuneate nucleus • Area postrema • Posterior median sulcus • Dorsal respiratory group

raphe/reticular: Sensory decussation • Reticular formation (Gigantocellular nucleus, Parvocellular reticular nucleus, Ventral reticular nucleus, Lateral reticular nucleus, Paramedian reticular nucleus) • Raphe nuclei (Obscurus, Magnus, Pallidus)

tracts: Corticospinal tract (Lateral, Anterior) • Inferior cerebellar peduncle • Olivocerebellar tract • Spinocerebellar (Dorsal, Ventral) • Spinothalamic tract • PCML (Posterior external arcuate fibers, Internal arcuate fibers, Medial lemniscus) • Extrapyramidal (Rubrospinal tract, Vestibulospinal tract, Tectospinal tract)
Metencephalon/pons
Metencephalon/cerebellum Vermis • Flocculus • Arbor vitae • Cerebellar tonsil • Inferior medullary velum

Molecular layer (Stellate cell, Basket cell, Parallel fiber) • Purkinje cell layer (Purkinje cell) • Granule cell layer (Golgi cell) • Mossy fibers • Climbing fiber

Deep cerebellar nuclei (Dentate, Emboliform, Globose, Fastigial)
Fourth ventricle apertures (Median, Lateral) • Rhomboid fossa (Vagal trigone, Hypoglossal trigone, Obex, Sulcus limitans, Facial colliculus, Medial eminence) • Lateral recess
Retrieved from "http://en.wikipedia.org/wiki/Vestibulospinal_tract"
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