16 SURGICAL ANATOMY OF 



and for its relief division of the frontal nerve has been 

 proposed at its point of exit from the supra-orbital notch. 



In infancy this region is frequently the seat of ceph- 

 alhsematomata or blood tumors, occurring either from 

 compression of the cranium during parturition, or from 

 a collection of blood beneath the pericranium, which is 

 very loosely attached to the bone at this period. 



Structures divided in cutting down upon the Bone in 

 the Occipito-frontal Region. Skin, subcutaneous cellular 

 tissue, occipito-frontalis muscle, and epicranial aponeu- 

 rosis, a thin layer of lax cellular tissue, and the pericra- 

 nium ; anteriorly the vessels divided are the temporal, 

 the frontal, and the supra-orbital, with the supra-orbital, 

 supra-trochlear, and branches of the auriculo-temporal 

 nerves, and posteriorly the occipital vessels and greater 

 and lesser occipital nerves. 



The Temporo-parietal Region. The superior limit of 

 this region is the lateral boundary of the occipito-frontal, 

 and its inferior limit is a line drawn from the external 

 angle of the frontal bone to the mastoid process of the 

 temporal. 



Dissection. The integument and subcutaneous cellular 

 tissue are pretty much the same as in the preceding re- 

 gion. The structures met with on reflecting the integu- 

 ment are a superficial aponeurosis, very tough, upon 

 which is the temporal artery ; a second aponeurosis lined 

 with fat and cellular tissue, and the small auricular 

 muscles. The temporal fascia is attached above to the 

 curved line limiting the temporal fossa, and to the 

 zygoma below; by its under surface it gives attachment 

 to the temporal muscle, in which lie the deep temporal 

 arteries from the internal maxillary, with their accom- 

 panying veins. The deep temporal arteries freely inos- 



