The frenulum veli, or frenulum of superior medullary velum, also known as the ''frenulum veli medullaris superioris'', ''cerebellar frenulum'', or ''frenulum cerebelli'' is a slightly raised white band passing from the inferior end of the
medial longitudinal fissure
The longitudinal fissure (or cerebral fissure, great longitudinal fissure, median longitudinal fissure, interhemispheric fissure) is the deep groove that separates the two cerebral hemispheres of the vertebrate brain. Lying within it is a continu ...
, through the groove between the
quadrigeminal bodies, and down to the
superior medullary velum.
On either side of this band the
trochlear nerve
The trochlear nerve (), ( lit. ''pulley-like'' nerve) also known as the fourth cranial nerve, cranial nerve IV, or CN IV, is a cranial nerve that innervates just one muscle: the superior oblique muscle of the eye, which operates through the pu ...
emerges, and passes forward on the lateral aspect of the
cerebral peduncle
The cerebral peduncles are the two stalks that attach the cerebrum to the brainstem. They are structures at the front of the midbrain which arise from the ventral pons and contain the large ascending (sensory) and descending (motor) nerve tract ...
to reach the base of the brain.
References
* Crosby EC, Humphrey T, Lauer EW, ''Correlative Anatomy of the Nervous System'', New York: MacMillan, 1962.
* Stedman, Thomas Lathrop, ''Stedman's Medical Dictionary'' (24th edition), Williams and Wilkins Co., Baltimore, 1982.
Cerebrum
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