56 The Ajiatomy of a HOKSV.. Chap. V. 



7he Orbh:uIa. Tiie odd Mufcle, or Orbkularis^ fo cal- 



ris, or odd led becaufc it goes round both Lips, and 

 Mufde. Ibmetimes Conjlr'uigem^ as it lerves like a 



Sphincter, to purte up or contradt the 

 Mouth, makes up the greatefl Part of the Lipsj and has 

 all the other Mufcles infcrted into it. 



§. III. Of the Mufcles of the lower Jaw. 



Tive Pair be- The upper Jaw, being immoveable, hath 

 knging to the no Mulcles, but the lower Jaw, having di- 

 loii-er Ja-M. y^j.g Adtions, is moved by hve Pair. 

 F'/i P ' "^^^ ^'^ ^^^ called the Temporal Mufcles^ 



■ "J *"'■ becaufe they are feated on the Tempks. 



They Tpring on each Side from the Bones of the Forehead, 

 the Sinciput y the Temples, and Os Cune former or Wedge- 

 like Bone, and delcend under the Oj Jugale, between the 

 Periojleum and Pericranium^ to the acute Procefs of the 

 lower Jaw, into which they are infcrted : Thefe Mufcles 

 pull up the lower Jaw, and fliut the Mouth. 

 Second Pair Tht fecond Pair arife from the Styloid 



Procefs of the Temporal Bone, flefhy and 

 round towards their Origin, but lofc their flefliy Subltance, 

 and degenerate into a nervous and round Tendon, as they 

 approach the Flexure of the lower Jaw-bone; and then 

 becoming flefhy again, are infertcd into the inner Side of 

 the lower Jaw, towards its middle or fore part; thefe be- 

 ing aflirted by the S^adrati above defcribed, pull down 

 the Jaw, and fo open the Mouth. 



^ThirdPair ^^'^ ^'^^^*^ ^^^^ ^^^ called the Miiffeters-t 



being very allirtant in the Office of chew- 

 ing, by moving the Jaw to the right and left Side ; each 

 of thefe hath two Beginnings, one from the Suture where 

 the fourth and iiiil Bone of the upper Jaw are joined ; and 

 the other from the Oi fugale^ and are largely inferted into 

 The outfides of the lower Jaw ; Thefe, by reafon of the 

 diverfity of their Fibres, move the Jaws divers ways. 

 Fourth Pa- '^^'^^ fourth Pair are called Pterygoideum 



extei?ium : Thefe have a double Beginning, 

 as the former, fpringing partly from the upper and outfide of 

 The Wing- like Procefs ot the Os Cuneiforme, or Wedge- like 

 Bone, and partly from the rough and fliarp Line of the faid 

 Bone, from whence defcending downwards, they are in- 

 leried :n the iniide of the lateral P.irt of the lower Jaw; 



by 



