PALMAR MUSCLES. T23 



Between the two heads the tendon of the flexor longus 

 pollicis passes. 



Function. To bend the first phalanx of the thumb. 



The adductor pollicis (Fig. 232) arises fleshy from the 

 whole extent of the ulnar surface of the metacarpal bone 

 of the middle finger. It is a broad, triangular muscle, 

 situated beneath the lumbricales and tendons of the flexors 

 sublimis and profundus ; its fibres converge and are in- 

 serted tendinous into the inner base of the first phalanx of 

 the thumb. Function. To draw the thumb to the fingers. 



The abductor indicis arises, fleshy and tendinous, from 

 the ulnar portion of the metacarpal bone of the thumb, 

 its whole extent, and the trapezium, and is inserted along 

 the metacarpal bone and radial side of the first phalanx 

 of the fore finger. Function. To draw the fore finger from 

 the rest, or adduct the thumb. 



MUSCLES OP THE LITTLE FINGER. 



The abductor minimi digiti (Fig. 232) arises fleshy from 

 the annular ligament and pisiform bone, and is inserted, 

 after running along the margin of the metacarpal bone 

 into the ulnar side of the first phalanx of the little finger. 



Function. To draw the little finger from the others. 



The adductor minimi digiti arises fleshy from the annu- 

 lar ligament and os unciforme, and is inserted tendinous 

 and fleshy into the front of the metacarpal bone of the 

 fore finger its whole extent. Function. To flex and draw 

 the little finger to the others. 



The flexor brevis minimi digiti (Fig. 232) arises fleshy 

 from the annular ligament and unciform bone. It is beneath 

 the abductor, and is inserted tendinous into the base of the 

 first phalanx of the little finger. 



Function. To bend the little finger. 



PALMAR MUSCLES. 



The palmaris brevis arises from the anterior annular 

 ligament and palmar aponeurosis. It is immediately below 



