220 MUSCLES OP THE HAND. 



brevis, will be exposed. After examining this muscle, remove it 

 with the deep fascia, in order to bring into view the muscles of the 

 little finger. 



The Pdlmaris brevis arises from the palmar fascia, and passes 

 transversely inwards, to be inserted into the integument on the inner 

 border of the hand. 



Relations, By its superficial surface with the fat and integument 

 of the ball of the little finger. By its deep surface with the internal 

 portion of the palmar fascia, which separates it from the ulnar 

 artery, veins, and nerve, and from the muscles of the inner border 

 of the hand. 



The Abductor minimi digiti arises from the pisiform bone, and is 

 inserted into the base of the first phalanx of the little finger. 



Relations. By its superficial surface with the internal portion of 

 the deep fascia and the palmaris brevis ; by its deep surface with 

 the flexor ossis metacarpi and metacarpal bone. By its inner border 

 with the flexor brevis minimi digiti. 



The Flexor brevis minimi digiti arises from the unciform bone and 

 annular ligament, and is inserted into the base of the first phalanx. 

 It is sometimes wanting. 



Relations. By its superficial surface with the internal portion of 

 the palmar fascia, and the palmaris brevis. By its deep surface with 

 the flexor ossis metacarpi, and metacarpal bone. Externally with 

 the abductor minimi digiti, from which it is separated near its origin 

 by the deep palmar branch of the ulnar nerve and communicating 

 artery. Internally with the tendons of the flexor sublimis and pro- 

 fund us. 



The Flexor ossis metacarpi (adductor, opponens) arises from the 

 unciform bone and annular ligament, and is inserted into the whole 

 length of the metacarpal bone of the little finger. 



Relations. By its superficial surface with the flexor brevis and 

 abductor minimi digiti. By its deep surface with the interossei 

 muscles of the last metacarpal space, the metacarpal bone, and the 

 flexor tendons of the little finger. 



Palmar Region. 



^umbricales, 

 Interossei palmares, 

 Interossei dorsales. 



The Lumbricales, four in number, are accessories to the deep 

 flexor muscle. They arise from the tendons of the deep flexor ; the 

 first and second from the palmar side, the third from the ulnar, and 

 the fourth from the radial side ; and are inserted into the aponeurotic 

 expansion of the extensor tendons on the radial side of the fingers. 

 The third, or that of the tendon of the ring finger, sometimes bifur- 

 cates, or is inserted wholly into the extensor tendon of the middle 

 finger. 



Relations. In the palm of the hand with the flexor tendons ; at 



