Model of sexual arousal. ANS = autonomic nervous system. Brain areas activated during arousal to allow sexual feelings, maintain focus on the sexual stimuli, anticipate reward, form a mental image of sexual behavior, limit actual behavior despite arousal, and elicit autonomic nervous system response of physical sexual arousal.

- http://jnci.oxfordjournals.org/content/vol99/issue9/images/large/jncidjk175f01_ht.jpeg


Circular model of human sexual response, showing cycle of overlapping phases. The sexual and nonsexual outcomes influence future sexual motivation.

- http://jnci.oxfordjournals.org/content/vol99/issue9/images/large/jncidjk175f02_ht.jpeg