The inferior cerebellar peduncle connects the medulla to the cerebellum. It is mostly an input pathway, carrying information from the spinal cord, inferior olive and vestibular system, but it also carries some output from the cerebellum to the vestibular nuclei.
| Location | Dorsolateral medulla, forming the lower lateral wall of the fourth ventricle and turning up into the cerebellum medial to the middle cerebellar peduncle |
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| Parts |
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| Connections |
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| Blood Supply | Posterior inferior cerebellar artery |
Carries proprioceptive, vestibular and olivary signals into the cerebellum and returns cerebellar output to the vestibular nuclei to coordinate balance.
The inferior cerebellar peduncle is commonly damaged in lateral medullary (Wallenberg) syndrome, accounting for the ipsilateral limb ataxia and tendency to fall toward the side of the lesion. Its role in the vestibular pathway also contributes to the vertigo and nystagmus.
Clumsiness and falling toward the side of a lateral medullary stroke from damage to the inferior cerebellar peduncle.
A strong sensation of being pulled to one side, with veering gait, after lesions of the inferior cerebellar peduncle and vestibular pathways.
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