348 A MANUAL OF ANATOMY 



situated beneath the acromion process of the scapula, the coraco- 

 acromial hgament, and the acromial portion of the deltoid muscle. 

 It covers the upper part of the capsular hgament, and the tendons 

 inserted into the great tuberosity of the humerus. Occasionally it 

 is multilocular. It has no communication with the synovial cavity 

 of the shoulder-joint. 



The bursa of the infraspinatus muscle, which is not constant, 

 is situated between the tendon of that muscle and the back 

 part of the capsule. It may communicate with the synovial 

 cavity of the joint through an opening in the back part of the 

 capsule. 



The bursa of the latissimus dorsi muscle is situated between the 

 back of the tendon of insertion of that muscle into the floor of the 

 bicipital groove of the humerus and the front of the tendon of 

 insertion of the teres major muscle into the inner bicipital ridge. 

 It has no communication with the synovial cavity of the shoulder- 

 joint. 



The bursa of the teres major muscle is situated directly behind 

 the tendon of insertion of that muscle into the inner bicipital ridge 

 of the humerus. It has no communication with the synovial cavity 

 of the shoulder- joint. 



The bursa of the coraco-clavicular ligament is situated between 

 the conoid and trapezoid portions of that hgament, which extend 

 between the outer part of the clavicle and the root of the coracoid 

 process of the scapula. It has no communication with the synovial 

 cavity of the shoulder-joint. 



The bicipital intertubercular synovial sheath invests the long tendon 

 of the biceps in the upper part of the bicipital groove of the humerus. 

 It is a prolongation of the synovial membrane of the shoulder- 

 joint. 



THE FOREARM AND HAND. 



Cutaneous Nerves. — Along the front of the outer side of the fore- 

 arm is the anterior branch of the cutaneous part of the musculo- 

 cutaneous, and along the back are its posterior branch and the lower 

 external cutaneous branch of the musculo- spiral. Along the front 

 and back of the inner side are the anterior and posterior divisions 

 of the internal cutaneous. All these nerves have been already de- 

 scribed. A small cutaneous branch of the ulnar nerve is given off 

 from it about the centre of the forearm, which, after piercing the 

 deep fascia and communicating with the anterior branch of the 

 internal cutaneous, has a limited distribution to the integument 

 just below the centre, internal to the median line. This branch 

 is not constant. 



The integument of the palm of the hand is supplied by the 

 palmar cutaneous branches of the ulnar, median, and radial. The 



