THE MUSCLES. 133 



Fasciae of the Head. 



178. 1. Galea capitis. See before. 



179. 2. F. temporalis, is covered at the upper part by the 

 Galea, but is not even connected, where free, with the external 

 skin. It covers the temporal muscle, dividing inferiorly into a 

 superficial delicate layer which is attached to the superior border, 

 and a deep one, to the internal surface of the zygomatic arch; 

 between the two there is fat and a branch of the art. temporalis; 

 between it and the temporal muscle likewise much fat. It is very 

 dense. (Pus does not readily penetrate it, but it gravitates towards 

 the malar-rnaxiHary fossa.) 



180. 3. F. buccalis : a. Superficial layer, that is, F. paroti- 

 dsea, very dense, especially on the external surface of the Parotis, 

 covering it like a sheath (pus does not penetrate it and the skin 

 easily); continuing as F. masseterica, where behind it appears to 

 divide, covering the m. masseter and ductus Stenonianus, above 

 and in front losing itself in fibro-cellular tissue. (Pus behind it 

 sinks towards the neck, that before it comes to the skin.) 



181. b. Deep layer, F. bucco-pharyngea, covers m. buccina- 

 tor, serving anteriorly for the attachment of this, posteriorly much 

 thicker, for that of the m. constrictor pharyngis super., since it 

 passes away behind m. pterygoid. intern., arid, like , is con- 

 nected with the /'. cervicalis. It separates the muscles from the 

 buccal mucous membrane. (Pus does not easily find its way 

 through these fascia towards the mouth and the reverse.) 



II. Muscles of the Neck. 

 A. Superficial cervical muscles. 



182. 1. Platysma-myoides (s.latissimuss. subcutaneous colli). 



Pos.: broad, close behind the skin, below firmly, above, united 

 with it by fat, on the sides of the neck, before ihefasc. cervicalis. 

 The two diverge from above downwards. Or. : the anterior supe- 

 rior part of the chest (two to three ribs) before m. pectoralis major. 

 Ins. : Basis maxill. infer., angle of mouth, Afaaseter, skin of the 

 face. Act. : draws the skin of the neck, somewhat the lower jaw 

 and under lip, downwards. 



Nerves : subculanei, colli supraclaviculares. 



183. 2. Slerno-cleido-mastoideus. 



Pos. : above at the sides, below on the anterior surface of the 

 neck; covered by the skin, by m. platysma myoid., separated 



