216 PRACTICAL ANATOMY. 



the second metacarpal comes from the ulnar side, 

 those of the fourth and fifth from the radial side. 



Insertion They are inserted into bases of first pha- 

 langes, and are adductors toward the middle finger. 



Nerve Ulnar. 

 DORSAL INTEROSSEOUS MUSCLES. 



Origin Four in number ; they are bipenniform mus- 

 cles, and arise from the sides of the metacarpal 

 bones : the first, from the sides of the metacarpal 

 of thumb and index finger ; the second, from those 

 of the index and middle fingers ; the fourth, from 

 those of the ring and little fingers. 



Insertion The first is inserted into the radial side of 

 the base of the first phalanx of index finger ; the 

 second, into the radial sides of base of first 

 phalanx of middle finger ; the third, on same bone 

 on the ulnar side ; the fourth, on base of first 

 phalanx of ring-finger on ulnar side. They are 

 abductors from the middle finger. 



Nerve Ulnar. 



MUSCLES OF THE LOWER EXTREMITIES. 

 PSOAS MAGNUS. 



Origin Transverse processes and sides of bodies of 

 lower two dorsal and all the lumbar vertebrae. 



Insertion On the lesser trochanter. 



Nerves Anterior lumbar. 

 PSOAS PARVUS. 



Origin Rudimentary, from last dorsal and first 

 lumbar. 



Insertion Iliac fascia, near ilio-pectineal eminence. 



Nerves Anterior lumbar. 

 ILIACUS. 



Origin From inner surface of ilium, ilio-lumbar liga- 

 ment, and base of sacrum. 



