An important goal of studies on steroid receptors in the brain is to understand the functions
of specific populations of steroid receptor-containing neurons, particularly in the control of
sexual behavior. The present study compared the ability of testosterone implants directed
toward the medial amygdaloid nucleus (Me) or the bed nucleus of the stria terminals (BNST)
and medial preoptic area (MPOA) to stimulate mating in castrated males. Twenty adult male
hamsters were selected for vigorous sexual behavior, and baseline measures of copulatory …