150 , MUSCLE TISSUE 



joint, and often sends a slip into it, and is inserted into 

 the inner part of the rough surface at the junction 

 of the coronoid process with the shaft of the ulna and 

 to a part of the tubercle of the ulna. 



The Muscles of the Posterior Humeral Region. The 

 muscles of this region are: 



Triceps. Subanconeus. 



Triceps occupies the entire posterior aspect of the 

 humerus. Three heads are inserted into a common 

 tendon occupying the posterior surface of the muscle 

 from the middle of the arm to the elbow. The middle 

 or long head arises from the inferior glenoid tubercle 

 of the scapula and adjacent portion of the axillary 

 border; this forms the middle and superficial part of 

 the muscle and ends on the inner margin of the tendon. 

 The external head arises above the spiral groove and 

 from an aponeurotic arch of the external intermuscular 

 septum as it crosses it, extending to the teres minor 

 insertion above, and inserted into the upper end and 

 outer border of the tendon. The internal or deep 

 head arises from the whole posterior surface of the 

 humerus below the spiral groove, from the lower part 

 of the external intermuscular septum, from the whole 

 of the internal, as high as the teres major; some of its 

 fibers are inserted directly into the olecranon process of 

 the ulna, but most join the deep surface of the tendon. 

 The common tendon is inserted into the tuberosity of the 

 olecranon process of the ulna, and externally a band 

 is prolonged over the anconeus to the fascia of the 

 forearm and posterior border of the ulna; it may send 

 a slip to the capsule. 



Muscles and Fasciae of the Forearm 



The superficial fascia is most distinct at the elbow, 

 contains the superficial veins, and below connects the 

 skin with the palmar fascia. 



