SHOKT MUSCLES OF THE HAND. 



391 



The muscle is placed deeply in the distal part of the forearm, and is wholly 

 concealed by the tendons, of the muscles which descend, under cover of the 

 transverse carpal ligament, to the wrist and fingers. The radial artery and its 

 accompanying veins pass over it at its insertion into the radius. 



ABDUCTOR POLLICIS LONGUS 



EXTENSOR POLLICIS BREVIS' 



ABDUCTOR POLLICIS BREVIS ^ 



OPP,ONENS POLLICIS 

 FLEXOR POLLICIS BREVIS 

 (superficial part) 

 ADDUCTOR POLLICIS (obliq 

 hes 



\DDUCTOR POLLICIS (trans- , 

 verse head) 



ABDUCTOR 

 POLLICIS 



FIRST 



DORSAL 

 INTER- 

 OSSEOUS' 



FIRST VOLAR 



INTEROSSEOUS 



SECOND DORSAL 

 INTEROSSEOUS 



FIRST AND SECOND LUMBRICALS{ 



FIRST PHALANX 



EXOR DIGITORUM SUBLIMIS TENDON 



DIGITAL SHEATH -- 

 PLEXOR DIGITORUM PROFUNDUS 

 TENDON 



FLEXOR DIGITORUM PROFUNDUS 



PRONATOR QUADRATUS 



.. FLEXOR CARPI ULNARIS 



PISIFORM BONE 

 HOOK OF OS HAMATUM 

 ABDUCTOR DIGITI QUINTI (cut) 

 - FLEXOR DIGITI QUINTI BREVIS (cut) 



OPPONENS DIGITI QUINTI 



THIRD VOLAR INTEROSSEOUS MUSCLE 



-- FOURTH DORSAL INTEROSSEOUS MUSCLE 



SECOND VOLAR INTEROSSEOUS MUSCLE 



THIRD DORSAL INTEROSSEOUS MUSCLE 



FLEXOR DIGITI QUINTI 

 BREVIS and ABDUCTOR 

 DIGITI QUINTI INSERTION 



TENDONS OF THIRD AND 



FOURTH LUMBRICALS 



FIG. 350. THE PALMAR MUSCLES (Eight Side). 



Nerve-Supply. Volar interosseous branch of the median nerve (C. 7. 8. T. 1.). 

 Action. The muscle acts along with the pronator teres in producing pronation of the 

 forearm. 



SHORT MUSCLES OF THE HAND. 



The short muscles belonging to the hand, in addition to the palmaris brevis 

 and the lumbrical muscles, already described, include the six muscles of the 



