Causes (Spinal Stenosis): When bones, discs or joints of the spine degenerate, bony spurs may form and push into the spinal canal or foramen space. This is called spinal stenosis, and it can also create harmful pressure against the spinal cord or nerve roots.
Symptoms: Nerve root injury in the cervical spine most commonly involves one of the three lowest levels of cervical vertebrae, which are called C5, C6 and C7. Symptoms may include pain, weakness, numbness and tingling, and may vary depending on the level of the injury. For example, an injury at the C5 level may cause pain and weakness in the shoulder and upper arm. An injury at the next vertebral level (the C6 vertebrae) may cause pain in the shoulder and the arm, and it may also cause weakness in the arm. And finally, an injury at the lowest level (the C7 vertebrae) may cause pain from the neck all the way down to the hand, along with weakness in the arm and hand.