Teen Brain on Pot: New Study Examines First Exposures

(Live Science, March 15) The chemical tetrahydrocannabinol (THC) in marijuana is known to trigger responses in brain regions related to thinking, perception, coordination and memory, and to have a lasting impact on users when taken frequently over time. 
 
But much less is known about how a growing brain responds to its first introduction to marijuana. An upcoming, long-term study, however, could shed light on the ways that marijuana and other substances and experiences affect a teenager's developing brain. Read more.