Frenulum veli

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Frenulum veli
Hind- and mid-brains; postero-lateral view. (Frenulum veli labeled at center left.)
Part ofsuperior medullary velum
Latinfrenulum veli medullaris superioris
Anatomical terms of neuroanatomy

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, through the groove between the quadrigeminal bodies, and down to the superior medullary velum.

On either side of this band the trochlear nerve emerges, and passes forward on the lateral aspect of the cerebral peduncle to reach the base of the brain.


  • 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.