the science that deals with the biological basis of behavior, thoughts, and emotions and the reciprocal relations between biological and psychological processes. It also addresses topics such as behavior-changing brain lesions, chemical responses in the brain, and brain-related genetics. It includes such fields as behavioral neuroscience, clinical neuroscience, cognitive neuroscience, behavioral endocrinology, and psychoneuroimmunology. Also called biopsychology; physiological psychology; psychobiology.
in DSM–IV–TR, a paraphilia characterized by the wearing of female clothes by a heterosexual male for the purpose of achieving sexual excitement and arousal. The term in DSM–5 is transvestic disorder, signifying that the paraphilia is only pathological if it causes distress or significant functional impairment. Whether disordered or not, it is distinct from transvestism, the nonsexualized cross-dressing by men or women of any sexual preference.