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.
Ulnar nerve decompression. The ulnar nerve is a nerve which supplies sensation and strength to a portion of the hand and forearm. It may become compressed or trapped as it courses past the olbow. Ulnar nerve decompression at the elbow is performed when the ulnar nerve is entrapped at the elbow. The pressure on the ulnar nerve may cause pain or numbness and tingling in the little finger and half of the ring finger. There may be weakness as well.