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 ...

There are three general classifications of abnormal behavior: (1) Neuroses, which have been traditionally characterized by anxiety and/or depression and other bothersome symptoms. People with neuroses ...

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 ...

A tiger walks the same worn groove along the edge of its exhibit, like a broken record. A parrot methodically plucks out its own feathers until bare skin shows through. To a casual visitor, these can ...