328 



THE ARTICULATIONS. 



parallel with one another, and directed obliquely downward and backward. Ex- 

 ternally, it is covered by the parotid gland and by the integument. Internally, 



FIG. 232. Temporo-maxillary articulation. External view. 



it is in relation with the capsular ligament, of which it is an accessory band, and 

 not separable from it. 



The Internal Lateral Ligament 

 (Fig. 233) is a specialized band 



x "- 1 "> * 5t^* *^^^i^ ^^^Mi !*' "" **' - : . c. - 



above to the spinous process of the 

 sphenoid bone, and, becoming 

 broader as it descends, is inserted 

 into the lingula and margin of the 

 dental foramen. Its outer surface 

 is in relation, above, with the Ex- 

 ternal pterygoid muscle ; lower 

 down, it is separated from the 

 neck of the condyle by the internal 

 maxillary artery ; and still more 

 interiorly, the inferior dental ves- 

 sels and nerve separate it from the 

 ramus of the jaw. The inner sur- 

 face is in relation with the Inter- 

 nal pterygoid. 



The Stylo -maxillary Ligament 

 is also a specialized band of the 

 _ cervical fascia, which extends from 



FIG. 233.-Temporo-maxillary articulation. Internal view, near the apex of the Styloid pro- 



cess of the temporal bone to the 

 angle and posterior border of the ramus of the lower jaw, between the Masseter 

 and Internal pterygoid muscles. This ligament separates the parotid from the 

 submaxillary gland, and has attached to its inner side part of the fibres of origin 

 of the Stylo-glossus muscle. Although usually classed among the ligaments of 

 the jaw, it can only be considered as an accessory in the articulation. 



