Computational Intelligence in Analysis of Electromyography Signals - Computational Intelligence in Biomedical Engineering - page 224

C5

Radial nerve

Posterior cutaneous nerve of arm

Lower lateral cutaneous nerve of arm

Posterior cutaneous nerve
of forearm

Triceps

Triceps and anconeus

Posterior interosseous
nerve

Brachioradialis

Extensor carpi radialis longus

Extensor carpi radialis brevis

Supinator

Extensor digitorum communis

Extensor digiti quinti

Extensor carpi ulnaris

Abductor pollicis longus

Extensor pollicis longus
and brevis

Superficial radial
sensory nerve

Extensor indicis proprius

Dorsal digital nerves

FIGURE 5.12
In the upper arm, the radial nerve first derives several cutaneous nerves of the
arm followed by muscular branches to the triceps brachii. It then wraps around
the humerus before descending down the elbow and deriving several smaller
nerves, which branch into the hand and the fingers. (Reprinted with permis-
sion from Preston, D., and Shapiro, B., Electromyography and Neuromuscu-
lar Disorders: Clinical-Electrophysiologic Correlations , Elsevier, Philadelphia,
PA, 2005.)