What Nerves Are Found in the Third and Fourth Lumbar Vertebrae?

The nerve roots for the L3 and L4 nerves pass through and leave the spinal column under the third and fourth lumbar vertebrae, respectively. The spinal cord does not run through these vertebrae, but the pair of L3 nerve roots exits between the L3 and L4 vertebrae, and the L4 nerve roots exit between the L4 and L5 vertebrae, the American Association of Neurological Surgeons reports.