376 



THE MUSCLES AND FASCIAE 



Relations. By its superficial surface, behind, with a large mass of fat, the sucking pad (cor- 

 pus adipCtsum buccae), which separates it from the ramus of the mandible, the Masseter, and 

 a small portion of the Temporal muscle. The sucking pad is much more developed, relatively, in 

 children than in adults. It assists sucking by aiding the cheek to resist atmospheric pressure. 

 The Buccinator muscle is in relation, anteriorly, with the Zygomatici, Risorius, Levator anguli 



FIG. 295. Temporal and deep muscles about the mouth. (Testut.) 



oris, Depressor anguli oris, and the parotid duct, which pierces it opposite the second molar 

 tooth of the maxilla; the facial artery and vein cross it from below upward; it is also crossed 

 by the branches of the facial and buccal nerves. By its deep surface it is in relation with the 

 buccal glands and mucous membrane of the mouth. 



The pterygomandibular ligament (raphe pterygomandibularis) is a tendinous 

 thickening of the buccopharyngeal fascia, attached by one extremity to the apex 

 of the internal pterygoid plate, and by the other to the posterior extremity of 



