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Table 1: Neurological exam of brachial plexus. |
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|
Roth |
Dermatome |
Myotome |
Reflex |
Terminal nerve |
Motor action |
|
C5 |
Lateral portion of the arm |
Delts and biceps muscles |
Bicipital |
Axillary |
Shoulder abduction |
|
C6 |
Lateral portion of the forearm, thumb and index and middle finger |
First and second outer radials muscles |
Long supinator reflex. Bicipital reflex |
Sensory branch of the musculocutaneous nerve |
Wrist extension |
|
C7 |
Middle finger |
Triceps, palmar major, anterior ulnar, interosseous hand muscles |
Tricipital |
Radial Medium Ulnar |
Wrist flexion. Finger extension |
|
C8 |
Ring and little fingers, medial forearm, |
Superficial common flexor of the fingers Common flexor of the fingers muscles |
|
Medial cutaneous antebrachial (posterior cord) |
Finger flexion |
|
T1 |
Medial portion of the arm |
Dorsal interossei. Little finger abductor muscles |
|
Medial cutaneous brachialis (posterior cord) |
Finger abduction |