Human brain produced and circulated. Underneath the cerebral cortex are several important structures, including the thalamus, the epithalamus, the pineal gland, the hypothalamus, the pituitary gland, and the subthalamus; the limbic structures, including the amygdala and the hippocampus; the claustrum, the various nuclei of the basal ganglia; the basal forebrain structures, and the three circumventricular organs. The cells of the brain include neurons and supportive glial cells. There are more than 86 billion neurons in the brain, and a more or less equal number of other cells. Brain activity is made possible by the interconnections of neurons and their release of neurotransmitters
The Sexual Brain performance, control of body temperature, stress, emotional responses, growth, and many other functions". LeVay notes that his INAH 3 study was his only publication on sex to that date, and that most of his previous research had been on the visual areas of the cerebral cortex. LeVay compares homosexuality to the disease sickle cell anemia, arguing that it may have persisted through a similar genetic mechanism. "The Sexual Brain" was first published in 1993 by MIT Press. "The Sexual Brain" received positive reviews from the journalist Peter Gorner in the "Chicago Tribune", Kenneth McLeish in "The Independent", the psychiatrist Avodah