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The pudendal nerve is the main nerve of the perineum. [1]: 274 It is a mixed (motor and sensory) nerve and also conveys sympathetic autonomic fibers.It carries sensation from the external genitalia of both sexes and the skin around the anus and perineum, as well as the motor supply to various pelvic muscles, including the male or female external urethral sphincter and the external anal sphincter.
A labelled diagram of the branches of the pudendal nerve in human males. ... Description= Pudendal nerve, course and branches |Source= Essential Clinical Anatomy. K.L ...
The perineal nerve is a branch of the pudendal nerve. [1] [2] It lies below the internal pudendal artery.It accompanies the perineal artery.It passes through the pudendal canal for around 2 or 3 cm. [1] [2] Whilst still in the canal, it divides into superficial branches and a deep branch. [1]
The posterior scrotal branches are two in number, medial and lateral. They are branches of the perineal nerve, which is itself a branch of the pudendal nerve.The pudendal nerve arises from spinal roots S2 through S4, travels through the pudendal canal on the fascia of the obturator internus muscle, and gives off the perineal nerve in the perineum.
The deep branch of the perineal nerve (or muscular branches) is a nerve of the perineum. It is a branch of the perineal nerve , from the pudendal nerve . It supplies the superficial transverse perineal muscle , bulbospongiosus muscle , ischiocavernosus muscle , the bulb of penis , levator ani , and the external anal sphincter .
The dorsal nerve of the penis is the deepest of three divisions of the pudendal nerve; it accompanies the internal pudendal artery along the ramus of the ischium; it then runs forward along the margin of the inferior ramus of the pubis, between the superior and inferior layers of the fascia of the urogenital diaphragm.
The anal triangle can be defined either by its vertices or its sides.. Vertices. one vertex at the coccyx bone; the two ischial tuberosities of the pelvic bone; Sides. perineal membrane (posterior border of perineal membrane forms anterior border of anal triangle)
The inferior rectal nerves (inferior anal nerves, inferior hemorrhoidal nerve) usually branch from the pudendal nerve but occasionally arises directly from the sacral plexus; they cross the ischiorectal fossa along with the inferior rectal artery and veins, toward the anal canal and the lower end of the rectum, and is distributed to the sphincter ani externus (external anal sphincter, EAS) and ...