Middle Cerebellar Peduncle
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Middle Cerebellar Peduncle
Middle cerebellar peduncle
Dissection showing the projection fibers of the cerebellum. (Middle peduncle labeled at upper right.)
Latin pedunculus cerebellaris medius
MeSH D065837
NeuroNames 620
NeuroLex ID birnlex_1529
TA A14.1.05.003
FMA 72515
Anatomical terms of neuroanatomy

The middle cerebellar peduncles (brachia pontis) are paired structures (left and right) that connect the cerebellum to the pons and are composed entirely of centripetal fibers, i.e. incoming fibers. The fibers arise from the pontine nucleus of the opposite hemisphere of the cerebellar cortex. The fibers are arranged in three fasciculi: superior, inferior, and deep.

  • The superior fasciculus, the most superficial, is derived from the upper transverse fibers of the pons; it is directed backward and lateralward superficial to the other two fasciculi, and is distributed mainly to the lobules on the inferior surface of the cerebellar hemisphere and to the parts of the superior surface adjoining the posterior and lateral margins.
  • The inferior fasciculus is formed by the lowest transverse fibers of the pons; it passes under cover of the superior fasciculus and is continued downward and backward more or less parallel with it, to be distributed to the folia on the under surface close to the vermis.
  • The deep fasciculus comprises most of the deep transverse fibers of the pons. It is at first covered by the superior and inferior fasciculi, but crosses obliquely and appears on the medial side of the superior, from which it receives a bundle; its fibers spread out and pass to the upper anterior cerebellar folia. The fibers of this fasciculus cover those of the inferior cerebellar peduncle.

Additional images


This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)

External links

  This article uses material from the Wikipedia page available here. It is released under the Creative Commons Attribution-Share-Alike License 3.0.



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