474 



THE MUSCLES AND FASCIA 



which arises from the inner side of the coronoid process of the ulna, joining the 

 preceding at an acute angle. The median nerve enters the forearm between the 

 two heads of the muscle and is separated from the ulnar artery by the deep head. 

 The muscle passes obliquely across the forearm from the inner to the outer side, 

 and terminates in a flat tendon, which turns over the outer margin of the radius, 

 and is inserted into a rough impression at the middle of the outer surface of the 

 shaft of that bone. 



BRACHIORADIALIS 



EXT. CARPI RAD. 

 LONG. 



COMMON TENDON 

 OF EXTENSORS 



8ICEP 

 8UPINATOR 



RADIAL ORIGIN OF FLEXOR 

 8UBLIMI8 DIGITORUM 



ABDUCTOR POLLICI8 

 FLEXOR BREVIS POLLICI 

 OPPONENS POLLICI 

 EXTENSOR OSS. 

 METACARP. POLL7 

 OPPONENS 

 POLLICIS 



ABDUCTOR POLLICIS 



FLEXOR LONGU6 

 POLLICIS 



8ESAMOID BONES FOR TWO 



ADDUCTORS OF THUMB AND 



FLEXOR BREVIS POLL. 



FLEXOR CARPI 

 RADIALIS 



PRONATOR TERE8 

 IMMON TENDON 

 OF FLEXORS 



FLEXOR SUBLIMI8 



DIGITORUM 

 BRACHIALI8 ANTICUS 



OCCASIONAL ORIGIN OF 

 FLEXOR LONGUS POLLICIS 

 UP1NATOR 



FLEXOR CARPI 

 ULNARI8 

 ABDUCTOR MINIMI 



DIGITI 



OPPONEN6 MINIMI DIGITI 

 FLEXOR BREVIS MIN. DIGITI 

 ADDUCTOR OBLIQUU8 POLLICIS 

 ADDUCTOR TRANSVERSUS 



POLLICIS 



FLEXOR BREVIS AND 

 ABDUCTOR MIN. DIG. 



FLEXOR 8UBLIMIS 



DIGITORUM 

 FLEXOR PROFUNDU8 

 DIGITORUM 



FIG. 355. Diagram showing attachments of the muscles of the forearm and hand. Anterior aspect. Origins, red; 

 insertions, blue. The origins and insertions of the Palmar interosseous muscles are omitted. (See Fig. 151.) 



Relations. By its superficial surface, throughout the greater part of its extent, with the 

 deep fascia; at its insertion the muscle is crossed by the radial vessels and nerve, and is covered 

 by the Brachioradialis; by its deep surface, with the Brachialis anticus, Flexor sublimis digitorum. 

 the median nerve, and ulnar artery, the small or deep head being interposed between the two 

 latter structures. Its outer border forms the inner boundary of a triangular space (antecubiial 

 space} in which are placed the brachial artery, median nerve, and the tendon of the Biceps 

 muscle. Its inner border is in contact with the Flexor carpi radialis. 



Applied Anatomy. This muscle, when suddenly brought into very active use, as in the 

 game of lawn tennis, is liable to be strained, producing slight swelling and tenderness, and pain 

 on putting the muscle into action. This is known as lawn-tennis arm. 



The Flexor carpi radialis (m. flexor carpi radialis} lies on the inner side of 

 the preceding muscle. It arises from the internal condyle by the common tendon, 

 from the fascia of the forearm, and from the intermuscular septa between it 

 and the Pronator teres, on the outside, the Palmaris longus internally, and the 

 Flexor sublimis digitorum beneath. Slender and aponeurotic in structure at 



