It has long been known that at the level of the midbrain pontine junction there is a neural mechanism essential for micturition. Contraction of the urinary bladder in response to increased intravesicular pressure is abolished in the cat following a subcollicular, but not after an intercollicular decerebration.' Electrical stimulation of the brain stem at the level of the inferior colliculus evo...

Two distinct subgroups of gonadotropin-releasing hormone (GnRH) neurons are involved in the control of luteinizing hormone secretion, at least in rats: one subgroup located in the mediobasal hypothalamus constitutes the GnRH pulse generator associated with opioid neurons, and the other located in the preoptic area constitutes the GnRH surge generator associated with gamma-aminobutyric acid neur...

Material and methods ................................................ Description of nuclear masses ......................................... The dorsal thalamus .............................................. Anterior nuclear group ....................................... Medial nuclear group ........................................ Midline and commissural iiuclei ..................................

Hormone-neurotransmitter interactions form an important link through which hormones influence a variety of behavioral processes. Typically, sexual behavior is dimorphic with males mounting receptive females. In the all-female lizard species Cnemidophorus uniparens, individuals display both male-like pseudocopulation and female-like receptivity. These respective behavioral states are correlated ...

A primary tenet of behavioral neuroendocrinology is that gonadal steroid hormones act on limbic nuclei to activate mating behavior in vertebrates. Traditionally, research has focused on the regulation of male-typical sexual behavior by testicular androgens and female-typical sexual behavior by ovarian estrogen and progesterone. Indeed, progesterone generally is regarded as an antiandrogen, acti...