The nerves that live in the low back control the legs. If a nerve is pinched in the low back, one could feel pain, numbness, or weakness in the leg. The nerves that live in the neck control the arms. If a nerve gets pinched by a disc in the neck, one could feel pain, numbness, or weakness in the arms. The nerves that live in the thoracic spine wrap around the chest wall and one could feel pain or numbness around the chest wall when a nerve is pinched.