Medical.Webends.com - A B C D E F G H I J K L M N O P Q R S T U V W X Y Z #

Penile Erection
Nocturnal Penile Tumescence; Penile Tumescence; Erection, Penile; Penile Tumescence, Nocturnal; Tumescence, Nocturnal Penile
The state of the PENIS when the erectile tissue becomes filled or swollen (tumid) with BLOOD and causes the penis to become rigid and elevated. It is a complex process involving CENTRAL NERVOUS SYSTEM; PERIPHERAL NERVOUS SYSTEMS; HORMONES; SMOOTH MUSCLES; and vascular functions.