MUSCLES 39 



membrane(p) joins tendon of extensor communis digitorum 

 to 2nd and 3rd phalanges of index-finger(x) (Posterior inter- 

 osseous). [Extends wrist and all joints of index.] 



THUMB, THENAR EMINENCE. 



Abductor pollicis : ridge of trapezium, sometimes scaphoid, 

 upner part of annular ligament(p) outer side of base of ist 

 phalanx of thumb(x) (Median). [Abducts thumb.] 



Opponens pollicis : anterior surface and ridge of trapezium, 

 annular ligament(p) whole length of radial border of shaft of 

 ist metacarpal(F) ("Median). [Opposes thumb to palm.] 



Flexor brevis pollicis : Outer head. Lower border of annular 

 ligament outer margin of the base of ist phalanx of thumb 

 (Median). Inner head. Inner side of base of tst metacarpal 

 bone inner side of base of ist phalanx of thumb (Ulnar). 

 [Flexes metacarpo-phalangeal and ist interphalangeal joint 

 of thumb.] A sesamoid bone developed in each tendon of insertion. 

 Deep palmar arch of radial, issues from behind inner head. 



Adductor obliquus pollicis : sheath of flexor carpi radialis, 

 anterior carpal ligaments, os magnum, bases of 2nd and 3rd 

 metacarpal bones inner side of base of ist phalanx of thumb 

 (Ulnar). [Adducts and flexes thumb.] 



Adductor transversus pollicis : ridge on lower of anterior 

 surface of shaft of 3rd metacarpal(p) ulnar side of base of ist 

 phalanx of thumb(x) (Ulnar). [Adducts and flexes thumb.] 



LITTLE FINGER, HYPOTHENAR EMINENCE. 



Palmaris brevis : annular ligament, palmar fascia(p) skin 

 on ulnar side of palm(p) (Ulnar). [Corrugates skin on ulnar 

 side of palm.] 



Opponens minimi digiti : process of unciform bone, lower 

 part of annular ligament(p) ulnar edge of 5th metacarpal(F) 

 ( Ulnar). [Opposes little finger to palm.] 



Flexor brevis minimi digiti : tip of process of unciform, 

 annular ligament(p) ulnar side of base of ist phalanx of little 

 finger(T) (Ulnar). [Flexes little finger.] 



Abductor minimi digiti : pisiform bone, tendon of flexor 

 carpi ulnaris(p) ulnar side of base of ist phalanx of little 

 finger(T) (Ulnar). [Abducts little finger.] 



DEEP PALMAR REGION. 



Lumbricales (4) : radial side of deep flexor tendons (2 inner 

 from ulnar margins of and and 3rd tendons also) (K) radial 



