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 study of adolescent brain development ever conducted in the United States has produced a finding that parents in ...

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

Youth cannabis use between ages 9 and 17 years is associated with slower cognitive development during a time of key brain development.

While some of us enjoy curling up with a good book, others prefer watching a series or playing video games. But from the ...

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

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 ...

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 ...

Researchers from University of California San Diego have found that teenagers who begin using cannabis show slower gains in thinking and memory skills as they grow. The study, published in ...

(Willie B. Thomas/DigitalVision/Getty Images) A long-term study of more than 11,000 children and teens has linked recreational cannabis use to slightly slower development of memory, attention, and ...

In the previous articles on the teen brain (Part 1 and Part 2), I introduced you to the arc of brain development from child to teen to adult. The majority of teen behaviors can be understood (maybe ...