[4] The perineal nerve supplies the skin and muscles of the perineum.

[1] The superficial branches supply sensation to the perineum, and the scrotum in men or the labia majora in women.

[1] The deep branch supplies superficial transverse perineal muscle, the bulbospongiosus muscle, the ischiocavernosus muscle, the bulb of penis, levator ani, and the external anal sphincter.

[1] The latency of the perineal nerve can be measured with electrodes.

[5] This article incorporates text in the public domain from page 968 of the 20th edition of Gray's Anatomy (1918)