THE UPPER LIMB 



495 



lumbar region they extend very nearly over their whole length. In 

 the neck the muscles of each pair are separated by a deep process 

 of the ligamentum nuchae, representing an interspinous hgament, 

 and in the lumbar region they are separated by the interspinous 

 ligaments themselves. 



Muldfidas Spiiue 



Levator Costae 



Rotator Spinae 



Levator Costs Longior 



Fig. 171.- 



-The Multifidus Spin.« and Levatores Costarum 

 Muscles. 



j Nerve- supply. — Posterior primary divisions of spinal nerves. 



j Action. — ^To extend the vertebrae. 



Intertransversales. — ^These muscles occur chiefly in the cervical 



i and lumbar regions, where they are arranged in pairs in each space. 



' In the neck they extend between the anterior and posterior tubercles 

 of adjacent vertebrae. In the liunbar region the muscles of each 

 pair are arranged as lateral and mesial. The intertransversales 

 laterales extend between two given transverse processes, and the 



