Surgical sectioning of any structure in the mesencephalon, especially of the pain-conducting tracts for the relief of unbearable pain.
- mesencephalic flexure,
- mesencephalic tegmentum,
- mesenteric artery,
- mesenteric ganglion,
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.