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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.
The pudendal block gets its name because a local anesthetic, such as lidocaine or chloroprocaine, is injected into the pudendal canal where the pudendal nerve is located. The pudendal nerve branches off of the sacral plexus and is both a sensory and motor nerve. [2] The pudendal nerve provides sensation information (i.e. innervates) for the ...
As discussed previously, pudendal nerve block is used as a diagnostic test for pudendal nerve entrapment. If the pain is relieved, this could mean that the origin of the pain is the pudendal nerve. However, pudendal nerve blocks are sometimes used as a long-term treatment, rather than as a one-time diagnostic test.
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 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 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.
Illustration of imaging from a CT-guided nerve block. The needle tip has been placed at the top of the pudendal canal to block the pudendal nerve. Diagnostic nerve blocks are very effective for identifying sensory entrapment points. Their strength is that they can directly measure whether a given nerve is contributing pain, or not.
Pudendal nerve entrapment. (PNE), also known as Alcock canal syndrome, is an uncommon source of chronic pain in which the pudendal nerve (located in the pelvis) is entrapped or compressed in Alcock's canal. Abdominal. Loin pain hematuria syndrome. Proctitis—infection or inflammation of the anus or rectum. Colitis—infection or inflammation ...