THE REVERSE LASÉGUE TEST OR PRONE KNEE BEND TEST FOR UPPER DISC HERNIATIONS WITH NERVE ROOT COMPRESSION Most disc herniations occur between L5/S1 mediolaterally affecting the nerve root of the level BELOW, so nerve root S1, followed by L4/5 affecting the L5 root if the herniation is mediolaterally. Far lateral disc herniations represent 7-12% of all lumbar disc herniations and are most often encountered at L3-L4, affecting the nerve root AT THE SAME LEVEL, so the nerve root of L3. A photo that n