EXAMINATION OF SOME SPINAL NERVES 
77 
nearer the ulnar than the radial edge, especially in the distal half of the region. The line enters 
the dorsal surface of the hand by passing over the joint between ulnar and radius, and runs to the 
mid-point of the knuckle of the ring-finger and down the back of the proximal phalanx of that 
finger for a short distance. Finally, the line turns abruptly outward to reach the cleft between 
the middle and the ring fingers, and attains there the point from which it was traced.' 
The individual variation met with in examining this field has been slight, but in two cases 
the field included all but the ulnar face of the ring-finger. In another (fig. 7, p. 98) it included 
part of ring-finger. 
2. Motor Root. Vllth root. (iVf Conspectus, p. 1 14 /'«/;•«.) 
Three experiments, two on Macacus rhi'sus, one on Macacus sinicus ; all by degeneration 
method. 
Dorsal primary division : ertxtor iphue and trcoisverso-spinala. 
f scaleni. 
serratus inagnus. 
pectoralis major (the whole muscle, apparently). 
pectoralis minor (less vigorously- than p. nidjor). 
deltoideus (especially the portion from the scapular spine). 
longus colli. 
Idtissimus dor si. 
triceps (especially the long and outer heads) anconeus, 
teres tnajoi'. 
subscapular! s. 
infraspinatus, 
coraco-brachialis. 
supinator longus. 
extensor carpi radialis longior. 
Ventral primary ^ extensor carpi radialis hrevior. 
flexor sublimis digitormn. 
flexor profundus digitorum. 
flexor carpi radialis. 
pronator radii teres. 
extensor communis digitorum feebl}', but distinctly. 
extensor carpi ulnaris „ 
extensor ossis metacarpi poUicis ,, 
extensor longus pollicis „ 
flexor brevis pollicis (superficial head only) „ 
division 
biceps 
hrachialis anticus 
flexor carpi ulnaris 
flexor longus pollicis 
supinator brevis 
feebly ; in one experiment not at al 
