THE HEAD AND NECK 



1295 



The fibres are directed upwards and inwards. 



Vertical Part — Origin. — ^The fronts of the bodies of the last two 

 cerv'ical and first three thoracic vertebrae. 



Insertion. — The fronts of the bodies of the second, third, and 

 fourth cervical vertebrae. 



Lower Oblique Part — Origin. — The fronts of the bodies of the 

 first three thoracic vertebrae in common with the lower portion 

 of the vertical part. 



Rectus Capitis Antictis Minor 



Rectus Lateralis i, 



Basilar Process of Occipital Bone 



^ Vertebral Artery 

 /.•' (third part) 



Rectus Capitis Anticus 

 Major 



Longus Colli (upper oblique part) 

 Vertebral Artery (second part) 



Scalenus Anticus,, / 

 Scalenus Medius^ 



Scalenus . 

 Posticus 



.r. Longus Colli (vertical part) 



Vertebral Artery (first part) 



Longus Colli (lower oblique 

 part) 



Scalene or Lisfranc's Tubercle 



Fig. 537. — The Right Prevertebral Muscles. 

 (The Vertebral Artery is also shown). 



Insertion. — ^The fronts of the tubercles of the costal processes 

 (anterior tubercles of the transverse processes) of the fifth and 

 sixth cervical vertebrae. 



Nerve-supply. — ^The anterior primary divisions of the adjacent 

 spinal nerves. 



Action. — ^To flex the cervical part of the vertebral column. 



