THE MUSCLES. 77 



the ulna. Inserted into the radius opposite to its origin. Use -To 

 roll the radius inwards. 



MUSCLES SITUATED CHIEFLY ON THE HAND. 



JJmbricales y arises from the tendons of the flexor profundus. In- 

 serted into the tendons of the extensor digitorum communis. Use 

 To bend the first and extend the second phalanx. 



Flexor brevis pollicis manus arises from the os trapezoides, liga- 

 ment of the wrist, and the os magnum. Inserted into the ossa 

 sesnmoidea and second bone of the thumb. Use To bend the 

 second joint of the thumb. 



Opponens pollicis arises from the os scaphoides and ligament of 

 the wrist. Inserted into the first bone of the thumb. Use To 

 bend the thumb. 



Mductor pollicis manus arises from the annular ligament, and os 

 trapezium. Inserted into the root of the first bone of the thumb. 

 Use To draw the thumb from the fingers. 



Mductor pollicis manus arises from the metacarpal bone of the 

 middle finger. Inserted into the root of the first bone of the thumb. 

 Use To pull the thumb towards the fingers. 



Mductor indicis manus arises from the first bone of the thumb, 

 and os trapezium. Inserted into the first bone of the fore-finger 

 posteriorly. Use To move the fore-finger towards the thumb. 



Palmaris brevis arises from the annular ligament, and palmar 

 aponeurosis. Inserted into the metacarpal bone and skin of the 

 little finger. Use To contract the palm of the hand. 



Abductor minimi digiti manus arises from the annular ligament 

 and os pisiforme. Inserted into the first bone of the little finger. 

 Use To draw the little finger from the rest. 



Abductor minimi digitis arises from the os cuneiforme and carpal 

 ligament. Inserted into the metacarpal of the little finger. Use- 

 To move that bone towards the rest. 



Flexor parvus minimi digiti arises from the annular ligament and 

 os cuneiforme. Inserted into the first bone of the little finger. 

 Use To draw the little finger from the rest. 



Interossei interni and interossei externi arise between the meta- 

 carpal bones, to the sides of which they are attached. Use To 

 extend the fingers, and move them towards the thumb. 



MUSCLES OF THE INFERIOR EXTREMITIES. 



Pectinalis arises from the anterior edge of the os pubis. Inserted 



