Vital Signs meets Dr. Laura Ann-Petitto who has spent four decades researching speech and language. Dr. Sanjay Gupta reports.
 
	Neuroscientist’s quest to understand language
								Sep 14, 2015 | 5:34 PM
							
			 
	Vital Signs meets Dr. Laura Ann-Petitto who has spent four decades researching speech and language. Dr. Sanjay Gupta reports.