Reactants and Products in Chemical Reactions. In a chemical reaction, substances (elements and/or compounds) called reactants are changed into other substances (compounds and/or elements) called products. You canât change one element into another in a chemical reaction â that happens in nuclear reactions.
The pudendal nerve is the main nerve of the perineum. It carries sensation from the external genitalia of both sexes and the skin around the anus and perineum, as well the motor supply to various pelvic muscles, including the male or female external urethral sphincter and the external anal sphincter.he pudendal nerve passes between the piriformis muscle and coccygeus (ischiococcygeus) muscles and leaves the pelvis through the lower part of the greater sciatic foramen. It crosses over the lateral part of the sacrospinous ligament and reenters the pelvis through the lesser sciatic foramen.
More in Chronic Pain. The pudendal nerve runs through the gluteus muscles (the buttocks) and into the perineum (think of the perineum as any part of the body that touches a bicycle seat). Pudendal neuralgia (also known as pudendal neuropathy) is a disorder of the pudendal nerve that can lead to chronic pelvic pain. This condition may be caused by pudendal nerve entrapment, when the nerve becomes compressed, or by damage to the pudendal nerve itself and is also known as pudendal neuropathy. Causes Chronic pelvic pain from pudendal neuralgia can be caused by any of the following: 1  diabetic neuropathy. 2  trauma to the buttocks or pelvis including childbirth. 3  excessive sitting (cyclists often have pudendal nerve entrapment) 4  thickening of ligaments around the pudendal nerve. 5  bony formations pushing against the pudendal nerve.