The nervous system chemical that triggers a man’s erection also helps his body maintain it, researchers say.
“We’ve closed a gap in our knowledge,” says Arthur Burnett, professor of urology at the Johns Hopkins University School of Medicine.
“We knew that the release of the chemical nitric oxide, a neurotransmitter that is produced in nerve tissue, triggers an erection by relaxing muscles that allow blood to fill the penis.
“We thought that was just the initial stimulus. In our research, we wanted to understand what happens next to enable that erection to be maintained.”
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