Each muscle in the body is supplied by a particular level of the spinal cord and by its corresponding spinal nerve.

The muscle, and its nerve make up a myotome.

C1/C2-neck flexion/extension

C3-neck lateral flexion

C4-shoulder elevation

C5-shoulder abduction

C6-elbow flexion/wrist extension

C7-elbow extension/wrist flexion

C8-thumb extension

T1-finger abduction

L2-hip flexion

L3-knee extension

L4-ankle dorsi-flexion

L5-great toe extension

S1-ankle plantar-flexion

S2-knee flexion

C3,4 and 5 supply the diaphragm.

C5 supplies the shoulder muscles and the muscle that bendd the elbow .

C6 bends the wrist back.

C7 straightens the elbow.

C8 bends the fingers.

T1 spreads the fingers.

T1 –T12 supplies the chest wall & abdominal muscles.

L2 bends the hip.

L3 straightens the knee.

L4 pulls the foot up.

L5 wiggles the toes.

S1 pulls the foot down.

S3,4 and 5 supply the bladder. bowel and sex organs and the anal and other pelvic muscles.

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