362 



THE MUSCLES AND 



MUSCLES AND FASCLffi OF THE CRANIUM AND FACE. 



The muscles of the cranium and face consist of ten groups, arranged according 

 to the region in which they are situated: 



1. Cranial Region. 



2. Auricular Region. 



3. Palpebral Region. 



4. Orbital Region. 



5. Nasal Region. 



6. Maxillary Region. 



7. Mandibular Region. 



8. Buccal Region. 



9. Temporomandibular Region. 

 10. Pterygomandibular Region. 



The muscles contained in each of these groups are the following: 



1. Cranial Region. 

 Occipitofrontalis. 



2. Auricular Region. 



Attrahens aurem. 

 Attollens aurem. 

 Retrahens aurem. 



3. Palpebral Region. 



Orbicularis palpebrarum. 

 Corrugator supercilii. 

 Tensor tarsi. 



4. Orbital Region. 



Leva tor palpebrae. 

 Rectus superior. 

 Rectus inferior. 

 Rectus internus. 

 Rectus externus. 

 Obliquus oculi superior. 

 Obliquus oculi inferior. 



5. Nasal Region. 



Pyramidalis nasi. 



Levator labii superioris alaeque 



nasi. 



Dilatator naris posterior. 

 Dilatator naris anterior. 

 Compressor nasi. 

 Compressor narium minor. 

 Depressor alae nasi. 



6. Maxillary Region. 



Levator labii superioris. 

 Levator anguli oris. 

 Zygomaticus major. 

 Zygomaticus minor. 



7. Mandibular Region. 



Levator menti. 

 Depressor labii inferioris. 

 Depressor anguli oris. 



8. Buccal Region. 



Buccinator. 

 Risorius. 

 Orbicularis oris. 



9. Temporomandibular Region. 



Masseter. 

 Temporal. 



10. Pterygomandibular Region. 



Pterygoideus externus. 

 Pterygoideus internus. 



1. The Cranial Region. 



Occipitofrontalis. 



Dissection (Fig. 287). The head being shaved, and a block placed beneath the back of 

 the neck, make a vertical incision through the skin, commencing at the root of the nose in front, 



