A discussion of two classes of natural opiate peptides (endorphins and enkephalins) recently found in the brain, and the role they may play in linking emotion and memory. (BB)

A brief discussion of neurophysiology, neurotransmitters, and the effect of psychoactive drugs on brain diseases such as schizophrenia. (BB)

Some newly reported research results indicate that slightly abnormal biological rhythms, both long- and short-term, may be key factors in the development of depression and manic-depression. The results may also hold clues about why certain drugs work or fail to work with different individuals. (Author/BB)