pontine nuclei

pl.n.

The very large mass of gray matter filling the pons and serving as a major way station in impulse conduction from the cerebral cortex of one hemisphere to the posterior lobe of the opposite cerebellar hemisphere.

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.