Physiologic Monitoring of Antidepressant Treatment Response

Study Objectives: * to identify neurophysiologic effects of venlafaxine treatment in normal controls using quantitative EEG (QEEG) cordance * to examine the effects of venlafaxine on different rating scales measuring mood and anxiety (e.g., Ham-D, BDI, SCL-90, POMS-BI, Visual Analog Mood Scale, SSRS, SASS, Q-LES-Q and SF-36) as well as on measures of cognitive and psychosocial function (i.e., Stroop, PASAT, RAVLT, Trailmaking A and B, Digit-Symbol, Grooved Pegboard, Multidimensional Health Locus of Control, Temperament and Character Inventory, Interpersonal Support Evaluation List, Godin Leisure-Time Questionnaire, and Pittsburgh Sleep Quality Index) in normal control subjects, and the association of changes in cordance with changes in thinking and memory. * to identify physiologic effects of venlafaxine treatment in normal controls using heart rate and immune function measures