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.
The differences are detailed below: 1  Diagnostic injections â These are also referred to as selective nerve blocks. A temporary numbing medicine is injected into the area containing the nerve that the physician suspects is pinched. 2  Pain management injections â These are also referred to as epidural steroid injections.