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Medical Definition of cerebellar peduncle
: any of three large bands of nerve fibers that join each hemisphere of the cerebellum with the parts of the brain below and in front:
a : one connecting the cerebellum with the midbrain
— called also brachium conjunctivum, pedunculus cerebellaris superior, superior cerebellar peduncle
b : one connecting the cerebellum with the pons
— called also brachium pontis, middle cerebellar peduncle, middle peduncle, pedunculus cerebellaris medius
c : one that connects the cerebellum with the medulla oblongata and the spinal cord
— called also inferior cerebellar peduncle, pedunculus cerebellaris inferior, restiform body
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