Quick Facts
The middle cerebellar peduncle (aka brachium points) is the largest of the cerebellar peduncles. The fibers originate in the pontine nucleus, cross the midline in the basilar pons and emerge on the opposite side as large bundles along the lateral side of the pontine tegmentum into the cerebellum.
Some uncrossed pontocerebellar fibers in this peduncle are distributed chiefly to the cortex of the cerebellar hemisphere with some collateral fibers passing to the cerebellar nuclei.
Fibers of the pontine nuclei primarily relay motor signals from the primary motor cortex to the cerebellum to modulate motor outputs of the brain.
Related parts of the anatomy
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Middle Cerebellar Peduncle
The WM fiber tract through the middle cerebellar peduncle is the cortico-ponto-cerebellar tract, which is a fiber bundle composed of afferent fibers connecting the sensory and motor areas of the cortex with the pons and crossing the midline to enter the cerebellum and plays a key role in the coordination and regulation of movement (Kamali et al., 2010;