View Single Post
Old 08-22-2004, 02:30 PM
Dr. Lao Dr. Lao is offline
Join Date: Jul 1999
Location: KCK
Posts: 1,818
I recall hearing in college biology that the voluntary nervous systems role in regulating erections is largely inhibitory. When that part of the nervous system is disconnected from the rest of the body, as during REM sleep, the parasympathetic nervous system takes over and orders a whole bunch of erections. I've heard that some paralyzed men run into similar problems all the time.