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.
Vagal Nerve Stimulation. Vagal nerve stimulation is a treatment used to reduce the frequency and intensity of seizures when medications aren't effective. The vagus nerve is one of many nerves that carry messages to and from the brain. It helps regulate internal organs such as the heart and stomach. Nerve fibers within the vagus nerve are connected to the part of the brain believed to be responsible for producing seizures. This procedure involves placing a small electric stimulator in the neck around the vagus nerve and a power source near the armpit or chest.