Steroid Hormone Regulation of the Brain focuses on the advancement of knowledge of the properties of brain steroid receptors and steroid target nerve cells, including the actions of gonadal steroids, adrenocortical steroids, and androgenic steroids on the brain. The selection features the work of authors who have inspiringly conducted extensive studies on the action of steroid hormones. The book starts with discussions that point out that steroid hormones not only function through intracellular steroid receptors, but possibly through steroid membrane actions as well. Studies to support this claim are presented. As to the action of steroid hormones on presynaptic transmitter mechanisms, the book suggests that adrenocortical and gonadal steroids can create alterations in noradrenaline, adrenaline, and dopamine levels and turnover within the hypothalamus and preoptic area. The effects of catecholestrogens on the brain are also elaborated. A contribution to this paper stresses that estrogens have antidopaminergic action in the extrapyramidal system. This idea is identified through a series of behavioral experiments and measurements of the levels of striatal acetylcholine. This selection is recommended to scientists interested in studying the effect of hormones on the brain.