The lumbar spinal nerve 2 (L2) is a spinal nerve

Spinal nerve

The term spinal nerve generally refers to a mixed spinal nerve, which carries motor, sensory, and autonomic signals between the spinal cord and the body...

 of the lumbar segment..

It originates from the spinal column from below the lumbar vertebra 2 (L2).

Muscles

L2 supplies many muscles, either directly or through nerves originating from L2. They may be innervated with L2 as single origin, or be innervated partly by L2 and partly by other spinal nerves. The muscles are:

• quadratus lumborum
  Quadratus lumborum muscle
  The Quadratus lumborum is irregular and quadrilateral in shape, and broader below than above.-Origin and insertion:It arises by aponeurotic fibers from the iliolumbar ligament and the adjacent portion of the iliac crest for about 5 cm., and is inserted into the lower border of the last rib for...
  
   (partly)
• iliopsoas
  Iliopsoas
  -External links:*...
  
  (partly)