MUSCLES OF THE GLOTTIS. 321 



obliquely upwards, and, covering a considerable part of the 

 superior constrictor, terminate in a point. 



Inserted into the middle of the cuneiforme process of the os 

 occipitis, before the foramen magnum, and joined to its fellow 

 at a white line in the middle back part of the pharynx. The 

 fibres at the middle part run more transversely than those above 

 or below. 



Use. To compress that part of the pharynx which it covers, 

 and to draw it and the os hyoides upwards. 



3. Constrictor Pharyngis Superior, 



Arises, above, from the cuneiforme process of the os occi- 

 pitis, before the foramen magnum, near the holes where the 

 ninth pair of the nerves passes out ; lower down, from the 

 pterygoid process of the sphenoid bone ; from the upper and 

 under jaw, near the roots of the last dentes molares ; and 

 between the jaws, it is continued with the buccinator muscle ; 

 and with some fibres from the root of the tongue, and from the 

 palate. 



Inserted into a white line in the middle of the pharynx, 

 where it joins with its fellow, and is covered by the constrictor 

 medius. 



Use. To compress the upper part of the pharynx, and draw 

 it forwards and upwards. See article, pharynx. 



Muscles situated about the Glottis. 



They consist generally of four pair of small muscles, and a 

 single one. See Larynx, chapt. xiv. 



Muscles situated on the Anterior Part of the Ned:, close to the 

 Vertebra. (Prevertebral Muscles.) 



These consist of one layer, formed by four muscles. 



1. Longus Colli, 



Arises, tendinous and fleshy from the bodies of the three 

 vertebrae of the back laterally ; and from the transverse process 

 of the third, fourth, fifth, and sixth vertebrae of the neck, near 

 their roots. 



