Shoulder Neuro

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Dermatomes

C4: superior shoulder

C5: lateral aspect of humerus

C6: radial aspect of forearm, thumb

C7: 3rd digit

C8: 4-5th digit, medial forearm

T1: distal medial aspect of humerus

T2: proximal medial aspect of humerus

Myotomes

C1-2: cervical spinal flexors

C3: CS lateral flexors

C4: scap elevators

C5: shoulder abductors

C6: elbow flexors, wrist extensors

C7: elbow extensors, wrist flexors

C8: thumb extensors

T1: hand intrinsics