Book excerpt: Sex Differences in Neurology and Psychiatry, Volume 175, addresses this important issue by viewing major neurological and psychiatric conditions through the lens of sexual dimorphism, providing an entirely novel approach to understanding vulnerability factors, as well as potential new treatment strategies in several common neuropsychiatric disorders. The handbook comprises four major sections: (1) Introduction to sex differences in neuroanatomy and neurophysiology, (2) Description of the impact of genetic, epigenetic, sex hormonal and other environmental effects on cerebral sex dimorphism, (3) Review of sex differences in neurologic disorders, and (4) Review of sex differences in psychiatric disorders. - Explores sex differences in human neuroanatomy and neurophysiology - Offers a pathway toward a gender-specific treatment of neurologic and psychiatric disorders - Provides an overview of the genetics of sex hormones, human brain structure, and function, as well as the epigenetics, environment and social context