It was thought that the brain remained stable until the changes of old age occurred. New studies reveal an unsuspected degree of dynamic change in brain tissues that suggest neuroadaptive alterations in response to pathogens, drugs, and even experience. Join expert Terry L. Jernigan, PhD, as she explains the implications of this exciting new research. Series: Sam and Rose Stein Institute for Research on Aging (SIRA) [3/2009] [Health and Medicine] [Show ID: 15883]