126 A MANUAL OF ANATOMY. 



Insertion. Into the median raphe and the pharyngeal 

 spine on the basilar process of the occipital bone. 



The stylopharyngeus muscle passes to its insertion be- 

 tween the middle and superior constrictor muscles. 



The Sinus of Morgagni 



Is the semilunar space left between the upper border of the 

 superior constrictor muscle and the base of the skull. It 

 is covered by the pharyngeal aponeurosis, and through it 

 passes the Eustachian tube and levator palati muscle. 



Nerve Supply. The three constrictors are supplied from 

 the pharyngeal plexus, the inferior in addition by the recur- 

 rent laryngeal. 



Action. The constrictors act in rotation from above 

 downward in the act of swallowing. Their action is in- 

 hibited, or reversed in vomiting. 



Rectus Capitis Anticus Major. 



Origin. From the anterior tubercles of the transverse 

 processes of the third to sixth cervical vertebrae, inclusive. 



Insertion. Into the under surface of the basilar process 

 of the occipital bone. 



Nerve Supply. First and second cervical nerves. 



Action. To flex the head. 



Rectus Capitis Anticus Minor. 



Origin. From the base of the transverse process of the 

 atlas. 



Insertion. Into the basilar process of the occipital bone, 

 behind the anticus. 



Nerve Supply. The first cervical nerve. 



Action. To flex the head. 

 Rectus Capitis Lateralis. 



Origin. From the upper surface of the transverse process 

 (lateral mass) of the atlas. 



