Princeton's WordNet(4.75 / 4 votes)Rate this definition: 1  light, illumination(noun) a condition of spiritual awareness; divine illumination. 2  illumination(noun) the degree of visibility of your environment. 3  clarification, elucidation, illumination(noun) an interpretation that removes obstacles to understanding.
The injection for a brachial plexus block is in the. side of your neck, or in your armpit, or close to your collar bone. Other. nerves can be blocked near the elbow, or in the forearm, wrist or hand. Sedation is commonly given before the injection is done.
In addition to a local anesthetic and contrast agent, a therapeutic block utilizes a steroid. The steroids used in these injections do not build muscles; they are not the kind of medicine the body builders and athletes take. The purpose of the steroid is to reduce inflammation, thereby decreasing pain. The therapeutic injection will not give you immediate relief of your symptoms.