624 THE NERVOUS SYSTEM. 
1. Dorsal (Posterior) Surface—continwed. 
Spinal Origins. 
Regions. Nerves. Preaxial Postaxial 
Nerves. Nerves. 
Musculo-spiral, upper external 
branch ; : : eS) 6 
nies Musculo-spiral, lower external | 
eee i) branch ; : Soils ORG Fh 
re ae | Musculo - cutaneous, posterior 
branch Cx55 6: 
GHEE Bits | Radial ; : : CrGan 
Tanceeide | Internal cutaneous, internal 
Gooner 3 branch Orme dls Ile 
OEE | Ulnar, dorsal branch Op tek 
(Vor 2] Radial 0.6.7. 
ae Inner side . ‘ 
Ulnar C. 8. 
(postaxial) 
I. Upper Limb. 
A. Cutaneous Nerves 
2. Ventral (Anterior) Surface. 
Spinal Origins. 
Regions. Nerves. Preaxial Postaxial 
Nerves. Nerves. 
| Upper part Cervical plexus, supraclavicular | _ 
(preaxial) branches , eC 3s As 
| Chest Intercostal nerves, anterlor | 
|| Lower part branches . ; : aie a7 
(postaxial) \ Intercostal nerves, lateral branches | 
Outer part {| Circumflex 4 : : co Cas 
(preaxial) \ | Musculo-spiral, upper external 
branch : CN bn: 
Upper arm .- i 
PP Internal cutaneous Crs; iat 
Inner part | Lesser internal cutaneous Ta 
aes \| Intercosto-humeral : : L241 
‘Outer part Musculo - cutaneous, anterior 
Raraarnh | (preaxial) branch 5 : E12 526 
eee part Internal | cutaneous, — anterior : 
(postaxtal) branch. C. oa 
‘Outer part Musculo- cutaneous, ball of thumb | C. 5. 6. 
(preaxial) | Median, palmar branch C2627, | 
‘ digital branches (Obs th Ie Il 
3 thumb, outer side C. 6. (7) 
in 55 Inner side ) Seen 
: 5 - CAGraie 
Band ; 5 index, outer side { 
Inner part 
(postaxial) 
oa a inner side | 
middle, outer side | 
Ps » Inner side | 
a ring, outer side | 
Ulnar, palmar branch 
5 digital branches 
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