PART III 



THE MUSCLES IN GENERAL 



Myology is the branch of anatomy which treats of the muscles. 

 Muscles are divided into voluntary striated, under the control 

 of the will; involuntary non-striated, not under the control 

 of the will. Between these two groups we have the cardiac 

 muscle, which is an involuntary striated muscle. 



In the description of a muscle is included the origin, mean- 

 ing its more fixed point or central attachment; and the insertion, 

 the movable point to which the force of the muscle is exerted. 



THE FASCLffi IN GENERAL 



These fibrous structures are arranged in two layers, super- 

 ficial and deep, each with its subdivisions. 



The superficial fascia is subcutaneous all over the body; 

 its web contains subcutaneous fat, the panniculus adiposus, 

 and often superficial muscles, the panniculus carnosus. There 

 is no fat in this layer in the eyelids, penis, and scrotum. Be- 

 neath the fatty layer is usually another, devoid of fat, for the 

 support of vessels and nerves. 



The deep fascia? or aponeuroses are made of strong fibrous 

 tissue covering the body more or less, forming aponeuroses of 

 investment or of insertion for muscles. Near some joints it 

 is strengthened by transverse bands, forming retinacula or 

 annular ligaments to hold tendons close to bones. 



