SURGICAL APPLIED ANATOMY. 



}i)art I. 



THE HEAD AND NECK. 



CHAPTER I. 



THE SCALP. 



THE soft parts covering the vault of the 

 skull may be divided into five layers : (1) the skin, 

 (2) the subcutaneous fatty tissue, (3) the occipito- 

 frontalis muscle and its aponeurosis, (4) the sub- 

 aponeurotic connective tissue, and (5) the pericranium. 

 It is convenient to consider the term " scalp " as 

 limited to the structure formed by the union of the 

 first three layers above named (Fig. 1). 



The skin of the scalp is thicker than it is in any 

 other part of the body. It is in all parts intimately 



Fig. 1. Diagram of a Vertical Section of the Scalp. 



a. Skin ; 6, subcutaneous tissue, with vessels ; c, aponeurosis ; d, sub-aponeuro- 

 tic tissue ; , pericranium ; /, bone ; g, dura mater. 



adherent, by means of the subcutaneous tissue, to the 

 aponeurosis and muscle beneath it, and, from this 

 B 4 



