A nerve root is the nerve fiber bundle that comes off from the spinal cord. It carries the motor and sensory nerve fibers out of the canal through the lateral recess and neural foramina. Impingement is when these nerves are compressed, which can cause pain, numbness, or weakness.
Also known as: Effacement, compression, abutment, deformity, contact, encroachment, flattening, indent, obliteration