THE MUSCLES 77 



(J?) M. coraco-radialis proprius, Stannius (1854-6). 



Biceps brachii Rudinger (1868). 



Part of biceps Mivart (1869). 



Coraco-radialis or biceps .... Humphry (1872). 



Long flechisseur de I'avant-bras (85) . . . Perrin (1899). 



Coraco-radialis ....... Osawa (1902). 



This section of the muscle also arises from the ventral surface of the 

 coracoid, deep to the foregoing slip. It is a very thin, fan-like muscle 

 and converges, at the glenoid cavity, to a strong two-lipped tendon. 

 The shorter lip is inserted close to that of the former slip on the 

 flexor side of the head of the humerus, while the longer tendon 

 (m.c.r'.) passes right down the arm, lying parallel with the humerus, 

 and between the M. coraco-brachialis longus and the M. humero- 

 antibrachialis. It is inserted on the mesial aspect of the proximal end 

 of the radius. 



Innervation : Both slips are innervated by the N. supracoracoideus, 

 from the second and third spinal nerves. 



Function : Both muscles serve to draw the arm towards the body^ 

 while the tendon of the latter portion also assists in flexing the elbow. 

 In general it is the opposer of the M. dors. scap. 



M. procoraco-humeraUs (m.p-h.). Fiirbringer (1873); Hoffmann 

 (1873-8); Osawa (1902); Rylkoff (1924). 



Portio superior m. pectoralis majoris . . . Funk (1827). 



Vorwartszieher oder Heber des Oberarms, dreieckiger Muskel 



Meckel (1828). 



Acromio-humeral, Deltoide ..... Duges (1834). 



Deltoides .... Stannius (1854-6); Rudinger (1868). 



Subclavius Mivart (1869). 



Precoraco-brachial Humphry (1872). 



Adducteur inferieur du bras (92) .... Perrin (1899). 



This muscle arises from the pro-coracoid portion of the pectoral 

 girdle, and passes posteriorly to be inserted on the head of the 

 humerus. The tendon of insertion is attached to the humerus a little 

 antero-mesial to the insertion of the M. dorsalis scapulae, while a 

 few fibres may be inserted between this muscle and the anterior 

 insertion of the M. dorso-humeralis. The shape of the muscle is 

 that of a narrow fan. 



Innervation-. The muscle has a dual innervation. At its lateral 

 border it receives a branch from the N. dorsalis scapulae, and at its 

 mesial border it is supplied by the N. supracoracoideus. 



Function : If the foot is raised from the ground the contraction of 



