Definition: inability to exchange information with others because of hearing, speech, and/or language problems caused by impairment of the nervous system (brain or nerves).
By Jamie Berke, About.com Guide
Updated December 03, 2008
About.com Health's Disease and Condition content is reviewed by our Medical Review Board
Learn how to save money on medications with these recommendations. More >
Keep yourself, and your family, happy and healthy this fall with these tips. More >
©2009 About.com, a part of The New York Times Company.
All rights reserved.