Definition: an endogenous peptide (as an endorphin or an enkephalin) that influences neural activity or functioning.
Examples: Neuropeptides can be released by the nerves after activation of the nerves by various pain syndromes.
From Teri Robert, former About.com Guide
About.com Health's Disease and Condition content is reviewed by the Medical Review Board
©2012 About.com. All rights reserved.
A part of The New York Times Company.