Scientists have devised a new model for studying disorders like autism spectrum disorder and ADHD. It uses clusters of human brain cells grown inside the brain of a rat.

Opioids can kill because they reduce breathing along with pain. Now brain scientists have made a discovery that could lead to potent pain drugs that don't affect breathing.

An experiment that induced imaginary sounds in both people and mice could help explain how brain disorders like schizophrenia cause hallucinations.