A new three-volume study, Abnormal Psychology Across the Ages, shows how far we have come in diagnosing and treating mental illness. In the Renaissance, the mentally ill were feared, shunned, and ...

Two studies have identified gastrointestinal problems in dogs that licked surfaces excessively or engaged in fly biting behavior. Once the underlying problems were treated, the compulsive behavior in ...

Lysergic acid diethylamide, or LSD, is a potent hallucinogen that alters the perception of reality. Researchers at Baylor College of Medicine have discovered changes in the brain, triggered by the ...

Dear Doctors: My boyfriend says that lately I’ve been talking in my sleep and sometimes acting out my dreams. One time I actually hit him. He says it may be something called an REM sleep behavior ...

Across captive settings, nonhuman primates may develop an array of abnormal behaviors including stereotypic and self-injurious behavior. Abnormal behavior can indicate a state of poor welfare, since ...

What is REM sleep disorder? REM sleep disorder (RBD) is a type of parasomnia associated with synucleinopathies ––a diverse group of neurodegenerative disorders thought to share a common pathologic ...

Researchers have discovered changes in the brain, triggered by LSD, that may explain the profound altered behavior associated with LSD, helping to understand how the brain generates behavior. Lysergic ...