Models of stress such as hypoglycemia have identified that stress results the next day in
decreased baroreflex sensitivity. This project will test the hypothesis that these delayed
changes in autonomic nervous system function are secondary to a rise in ACTH. The
investigators will infuse cosyntropin versus placebo in a double-blind, crossover study in
healthy adults and measure the delayed effects on the autonomic system as measured by
cardiovagal baroreflex sensitivity.