Which cerebellar peduncle carries the olivocerebellar fibres that form the climbing fibre input to the cerebellar cortex?

• A Inferior cerebellar peduncle ✓
• B Middle cerebellar peduncle
• C Superior cerebellar peduncle
• D Uncinate fasciculus of the fastigial nucleus

Explanation

The inferior cerebellar peduncle, or restiform body, carries afferents entering from the medulla and spinal cord, including the olivocerebellar tract from the inferior olivary nucleus, which constitutes the entire climbing fibre system, together with spinocerebellar and vestibulocerebellar fibres. The middle peduncle carries only pontocerebellar mossy fibres and is the largest of the three, while the superior peduncle is chiefly the efferent output through the dentatorubrothalamic route. The uncinate fasciculus is a small efferent bundle from the fastigial nucleus, not an input pathway.

Reference: Gray's Anatomy, 42nd ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.