Superior cerebellar peduncle

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Superior cerebellar peduncle
Sagittal section of the cerebellum, near the junction of the vermis with the hemisphere. (Superior peduncle labeled at upper right.)
Dissection showing the projection fibers of the cerebellum. (Superior peduncle labeled at center top.)
Latin pedunculus cerebellaris superior
Gray's p.792
NeuroNames ancil-1289712953
NeuroLex ID Superior cerebellar peduncles
TA A14.1.05.006
FMA 72495
Anatomical terms of neuroanatomy

The superior cerebellar peduncles (brachia conjunctiva), two in number, emerge from the upper and medial part of the white matter of the hemispheres and are placed under cover of the upper part of the cerebellum.


They are joined to each other across the middle line by the anterior medullary velum, and can be followed upward as far as the inferior colliculi, under which they disappear.

Below, they form the upper lateral boundaries of the fourth ventricle, but as they ascend they converge on the dorsal aspect of the ventricle and thus assist in forming its roof.


Deep dissection of brain-stem showing decussation

The decussation of superior cerebellar peduncle is the portion of the superior cerebellar peduncle which crosses into the midbrain. This decussation comprises the cerebellothalamic tract or dentatothalamic tract and the cerebellorubral tract which arises from the globose and emboliform nuclei to the contralateral red nucleus to become the rubrospinal tract.


The ventral spinocerebellar tract enters the cerebellum through the superior cerebellar peduncles, which otherwise mostly contain efferent fibres.

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This article incorporates text from a public domain edition of Gray's Anatomy.