CRANIAL REGION. 



391 



3. Palpebral Region. 



Orbicularis palpebrarum. 

 Corrugator supercilii. 

 Tensor tarsi. 



4. Orbital Region. 



Levator palpebrae. 

 Rectus superior. 

 Rectus inferior. 

 Rectus internus. 

 Rectus externus. 

 Obliquus superior. 

 Obliquus inferior. 



5. Nasal Region. 



Pyrarnidalis nasi. 



Levator labii superioris alaeque nasi. 



Dilatator naris posterior. 



Dilatator naris anterior. 



Compressor nasi. . 



Compressor nai'ium minor. 



Depressor alse nasi. 



6. Superior Maxillary Region. 



Levator labii superioris. 

 Levator anguli oris. 

 Zygomaticus major. 

 Zygomaticus minor. 



7. Inferior Maxillary Region. 



Levator labii inferioris. 

 Depressor labii inferioris. 

 Depressor anguli oris. 



8. Intermaxillary Region. 



Buccinator. 

 Risorius. 

 Orbicularis oris. 



9. Temporo-maxillary Region. 



Masseter. 

 Temporal. 



10. Ptery go-maxillary Region. 



Pterygoideus externus. 

 Pterygoideus internus. 



1. Cranial Region Occipito-frontalis. 



Dissection (Fig. 268). The head being shaved, and a block placed beneath the back of 

 the neck, make a vertical incision through the skin from before backward, commencing 

 at the root of the nose in front, and terminating behind at the occipital protuberance ; make 



1. Dissection of scalp. 



2, 3, of auricular region. 



4, 5, 6, of face. 



7, 8, of neck. 



FIG. 268. Dissection of the head, face, and neck. 



a second incision in a horizontal direction along the forehead and round the side of the 

 head, from the anterior to the posterior extremity of the preceding. Raise the skin in front, 

 from the subjacent muscle, from below upward ; this must be done with extreme care, 

 removing the integument from the outer surface of the vessels and the nerves which lie 

 between the two. 



The Skin of the Scalp. This is thicker than in any other part of the body. It 

 is intimately adherent to the superficial fascia. The hair-follicles are very closely 



