Table 12.26.3
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Muscle function and sensory loss
Root injuredFunctional lossSensory loss

C5/C6

Shoulder external rotation, flexion and abduction, elbow flexion, possibly wrist extension

Thumb and index finger

C5/C6/C7

Additionally elbow, wrist, finger, and thumb extension

Additionally the middle finger

C8/T1

Finger and thumb flexion, median and ulnar intrinsics

Ring and little fingers

C5/T1

All arm function

All arm sensation

Root injuredFunctional lossSensory loss

C5/C6

Shoulder external rotation, flexion and abduction, elbow flexion, possibly wrist extension

Thumb and index finger

C5/C6/C7

Additionally elbow, wrist, finger, and thumb extension

Additionally the middle finger

C8/T1

Finger and thumb flexion, median and ulnar intrinsics

Ring and little fingers

C5/T1

All arm function

All arm sensation

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