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Biological: Behavioural genetics · Evolutionary psychology · Neuroanatomy · Neurochemistry · Neuroendocrinology · Neuroscience · Psychoneuroimmunology · Physiological Psychology · Psychopharmacology (Index, Outline)
Brain: Medial vestibulospinal tract | ||
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Vestibulospinal tract is 2c, in red at bottom center. | ||
Diagram of the principal fasciculi of the spinal cord. | ||
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MeSH | [1] |
The medial vestibulospinal tract is one of the descending spinal tracts of the ventromedial pathway.
The medial part of the vestibulospinal tract is the smaller part, and is primarily made of fibers from the medial vestibular nucleus. It projects bilaterally down the spinal cord and triggers the ventral horn of the cervical spinal circuits, particularly controlling lower motor neurons associated with the spinal accessory nerve (CN XI). Additionally, the pathway projects superiorly to the paramedian pontine reticular formation, indirectly innervating the nuclei of CN VI and III. Through this superior projection, the medial vestibulospinal tract is involved in "yolking" the eyes together in response to rapid movement of the head. Thus, cumulatively it controls position of the head, neck, and eyes in response to changes in posture.
See also
Brain and spinal cord: neural tracts and fasciculi | |||||||||||||||
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Sensory/ ascending |
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Motor/ descending |
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Cerebellar |
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Auditory and vestibular pathways | ||||
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Auditory |
inner ear: Hair cells → Spiral ganglion → Cochlear nerve VIII → pons: Cochlear nuclei (Anterior, Dorsal) → Trapezoid body → Superior olivary nuclei → midbrain: Lateral lemniscus → Inferior colliculi → | |||
Vestibular |
inner ear: Vestibular nerve VIII → pons: Vestibular nuclei (Medial vestibular nucleus, Lateral vestibular nucleus) cerebellum: Flocculonodular lobe spinal cord: Vestibulospinal tract (Medial vestibulospinal tract, Lateral vestibulospinal tract) | |||
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