DISSECTING MANUAL. 



finger and thumb, and sometimes all of them, join the sheaths 

 lying under the anterior annular ligament. [339] 



Palmaris Brevis. This is a quadrilateral subcutaneous 

 muscle on the inner side of the hand, under the superficial 

 fascia. Origin; inner border of palmar fascia. Insertion; 

 skin of inner border of hand. [336] 



MUSCLES. 

 Front and Inner Side of Forearm, Superficial Layer. 



Pronator Radii Teres. Origin; (superficial head) common 

 tendon from internal condyle of humerus; fascia over it; in- 

 termuscular septum ; (deep head) inner side of coronoid proc- 

 ess of ulna. Insertion; oval impression on middle of outer 

 surface of radius. [339] 



Flexor Carpi Radialis. Origin; common tendon from in- 

 ternal condyle; fascia over it; intermuscular septa. Course; 

 its rounded tendon runs in a groove in the trapezium. Inser- 

 tion; anterior surfaces of upper ends of second and third 

 metacarpals. [339] 



Palmaris Longus. Origin; common tendon from internal 

 condyle; fascia over it; intermuscular septa. Insertion; sur- 

 face of anterior annular ligament; apex of triangular palmar 

 fascia. [340] 



Flexor Carpi Ulnaris. Origin; (humeral) common tendon 

 from internal condyle; fascia over it; intermuscular septum; 

 (ulnar) olecranon process and upper three-fifths of posterior 

 border of ulna, through the deep fascia. Insertion ; pisiform 

 bone. [340] 



Flexor Sublimis Digitorum. Origin; (humeral) common 

 tendon from internal condyle; internal lateral ligament of 

 elbow joint; intermuscular septa; (ulnar) inner border of 

 coronoid process, above origin of Pronator radii teres ; (radial) 

 oblique line and middle third of outer border of radius, by an 

 aponeurosis. Course; it separates in the lower third of the 



[170] 



