"Based upon the results of the various analyses of the transition from the later stimulation through orgasm, we conclude that “going over” into orgasm involves a complex interaction between sensory integration, motor, reward, and cognitive region, involving the autonomic nervous system. The evidence of activation of brain regions that control both sympathetic and parasympathetic activity at orgasm in this study of women suggests that, similar to the dual activation involved in orgasm in men (penile erection: parasympathetic function; ejaculation: sympathetic), both divisions of the autonomic nervous system contribute to the process of orgasm in women."