Adult Brachial Plexus Injury
The brachial plexus is a network of nerves that originates at the spinal cord near the neck and passes down your upper arm from under your collar bone. The brachial plexus consists of 5 nerve roots. These include nerve roots from the lower cervical segment of the spinal cord known as C5, C6, C7 and C8, and a nerve root from the first thoracic spinal cord segment known as T1. These nerves join to form the upper, middle and lower trunks of the brachial plexus which split into nerves that supply your upper limbs, controlling your shoulder, elbow, wrist and hand. An injury to any part of these nerves can stop signals to and from the brain and may partially or completely paralyze your arms.