y 
I. Upper Limb. 
J. Muscular Nerves. 
1. Dorsal (Posterior) Surface. 
THE DISTRIBUTION OF THE SPINAL NERVES. 
625 
Spinal Origins. 
Regions. Muscles. Nerves Preaxial Postaxial 
Nerves. Nerves. 
Upper part | Trapezius Cervical plexus C. 3. 4. 
(Gear ae eden, cri shat ules 'f Cervical plexus C. 3. 4. 
muscles) oe reed hace * \ Posterior scapular (OL & 
Rhomboidei Posterior scapular Ors: 
Posterior thoracic Cabs Gae/ 
Shoulder 
Lower part 
(postaxtal 
muscles) 
Serratus magnus 
Supraspinatus | 
Infraspinatus 
Subscapularis 
Teres major 
Teres minor | 
Deltoid J 
Latissimus dorsi 
Triceps . : 
| Suprascapular 
{Short subscapular 
\ Middle 
”? 
Middle subscapular 
Cireumflex 
Long subscapular 
| Outer head | C. (6). 7. 8 
Upper arm ; , 8 Middle head |; Musculo-spiral | 
| Inner head | | i C. 7. 8. 
Anconeus | | 
(| Brachio-radialis : Si | C. 5.6 
Extensor — carpi radialis |; Musculo-spiral | 
longior : : |G. (@): 6. 7-.(8): 
Extensor carpi radialis |) 
brevior . : a@ii(G)G: 276): 
Supinator radii brevis | C. (5) 6. 
Extensorcommunisdigitoruin } 
Forearm . 7 an) y minimi digiti . Oath. Gide sc) 
ys carpi wlnaris Ge oe 
Extensor ossis metacarpi pol- rea (Ci). 6 8 
licis . : : : 
Extensor longus pollicis | 
x brevis pollicis 
%y indicis 
I. Upper Limb. 
B. Muscular Nerves. 
2. Ventral (Anterior) Surface. 
ees 
| Spinal Origins. 
Regions. Muscles. Nerves. Preaxial Postaxial 
Nerves. Nerves. 
| 
Upper part | Sternomastoid Cervical plexus C. 2. 
(preanial Omohyoid \ _| Ansa hypoglossi CGE 28a: 
muscles) | Sternohyoid J | dro 
Pectoral | Subclavius Brachial plexus Cr 526. 
Region Pectoralis major ald G. 5.6: 7. 8 7lae 
Lower part Clavicular part || Anterior thoracic | 0.5.6. 
(postaxial Sternal part | | nerves Hey prose Ru Peto Wy ANS) 
muscles) Pectoralis minor . Wy C.7..8, Tei. 
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