Researchers find marijuana use in teens tied to slower gains in memory, focus, and thinking skills.

Though some say weed can improve mood and energy, there are negative effects on cognitive skills — especially in younger ...

A systematic review reveals adolescent cannabis use alters brain structure, elevates addiction risk, and impacts cognitive ...

Adolescence is widely thought to be a time when the brain trims away excess neural connections, refining circuits through synaptic pruning. New research now suggests this view may be incomplete.

The largest US study to date on teen cannabis uses shows that cannabis use during adolescence may hinder cognitive improvement over time.

A study of more than 11,000 teens finds cannabis use tied to slower gains in memory, focus and thinking speed as well as ...

Teen cannabis use is linked to slower cognitive growth, especially memory, with THC as a likely contributor during key ...

Teens who start using cannabis before age 15 are more likely to use the drug often later in their lives. They are also more likely to develop mental and physical health problems in young adulthood ...

SAN DIEGO — A new UC San Diego study strengthens the growing body of evidence that marijuana use impacts adolescent brain ...

For decades, my colleagues and I advanced the premise that early substance use—nicotine, alcohol, or cannabis (or other addicting drugs)—interferes with critical maturation stages, particularly ...

The teenager's brain has a lot of developing to do: It must transform from the brain of a child into the brain of an adult. Some researchers worry how marijuana might affect that crucial process.

Adolescents who will eventually experiment with marijuana score higher on behaviors of intelligence. Teens who were exposed ...