Sexual arousal disorder is characterized by a lack or absence of sexual fantasies and desire for sexual activity in a situation that would normally produce sexual arousal, or the inability to attain or maintain typical responses to sexual arousal. The disorder is found in the DSM-IV. The condition should not be confused with a sexual desire disorder.
The term is often used in the diagnosis of women (female sexual arousal disorder), while the term erectile dysfunction (ED) is often used for men.
It is believed that sexual arousal is linked to the activity of cholinergic neurotransmitters.