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Muscles of the Neck. 



210. The Deep Muscles of the Neck 



Muscles of the Lateral Vertebral Region (taking their 

 fixed point at the neck, they elevate the first and second ribs ; taking 

 their fixed point at the ribs, they act as lateral flexors of the neck and 

 bend the neck forwards): 



M. scalenus anticus arises from the transverse processes of the third 

 to the sixth cervical vertebrae, and is inserted into the upper border of 

 the first rib, at the Tuberculum Lisfrancii. 



M. scalenus medius arises from the transverse processes of all seven 

 cervical vertebrae, and is inserted into the upper border and external sur- 

 face of the first rib. 



M. scalenus posticus arises from the transverse processes of the fifth 

 to the seventh cervical vertebrae and is inserted into the outer surface 

 of the second rib. 



