superior cerebellar peduncle

n.
  1. A large bundle of nerve fibers that originates from the dentate nucleus of the cerebellum and emerges from the cerebellum along the lateral wall of the fourth ventricle.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.