Selected Nerve Root Injections (SNRI)
Selected Nerve Root Injection Facts & Information - Selected Nerve Root Injections (SNRI) deliver medication directly into an inflamed nerve root that exits the spinal cord. Spinal nerve roots are positioned along the length of the spinal column. They are responsible for sending and receiving sensory (feeling) and motor (motion) signals throughout the body. Nerve roots extend off the spinal cord and branch out in a complicated infrastructure of nerves.