It might be of interest to note that there have been studies done on spinal mechanics that have shown that 'normal' rotation, flexion, extension and sidebending does NOT impinge upon the nerve roots exiting the spine unless there is abnormal conditions present such as spondylosis, osteophytic growths, disc collapse/degeneration, etc. ...However, under normal biomechanical movement nerves have been shown to have plenty of room... . In fact the studies showed that it was actually difficult to 'pinch' the nerve in a healthy spine without these conditions.