responses in the external anal and urethral sphincters as well as in the bulbocavernosus muscle have been evoked by supramaximal electrical stimulation of the penis ( or clitoris ) , perineum and the peri-anal region and recorded electromyographically in 82 male subjects 5 to 73 years old and in nine female subjects 18 to 55 years old , who had no systemic diseases or demonstrable sacral nervous system lesion .
C0031066
perineum
C1275631
anal region