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medial longitudinal fasciculus
(redirected from Medial longitudinal fascicle)

   Also found in: Wikipedia 0.01 sec.
medial longitudinal fasciculus
n.
A longitudinal bundle of fibers extending from the upper border of the mesencephalon into the cervical segments of the spinal cord, composed largely of fibers from the vestibular nuclei ascending to the motor neurons innervating the external eye muscles, and descending to spinal cord segments innervating the musculature of the neck.

fasciculus, medial longitudinal
One of a pair of nerve fibres, one on each side of the midline and extending from the upper midbrain to the cervical spinal cord. It is composed largely of ascending fibres from the vestibular nuclei ascending to the motor nuclei (third, fourth and sixth) and innervating the extraocular muscles; and to a lesser extent of descending fibres from the medial vestibular nuclei, the reticular formation, the superior colliculi and nucleus of Cajal innervating the musculature of the neck. Syn. medial longitudinal bundle; posterior longitudinal bundle.


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