Functional Anatomy & Kinesiology

Myotome C1

cervical flexion (head down)

Myotome C2

cervical extension (head back)

Myotome C3

Cervical lateral flexion

Myotome C4

Shoulder shrug

Myotome C5

Shoulder abduction/elbow flexion

Myotome C6

Elbow flexion/wrist extension

Myotome C7

Elbow extension/wrist flexion

Myotome C8

Ulnar deviation, thumb extension, finger flexion

Myotome T1

Finger adduction/abduction

Myotome L1 & L2

Hip flexion

Myotome L3

Knee extension

Myotome L4

ankle dorsiflexion and inversion

Myotome L5

Great toe extension

Myotome S1

Ankle eversion

Myotome S2

Ankle flexion

Dermatome C1

Top of head

Dermatome C2

Temporal, occipital region

Dermatome C3

Posterior cheek, neck

Dermatome C4

Superior shoulder, clavicle region

Dermatome C5

Deltoid patch, lateral upper arm

Dermatome C6

Lateral forearm, radial hand, thumb, index finger

Dermatome C7

Posterior lateral arm and forearm, middle finger

Dermatome C8

Medial forearm, ulnar border of hand, 4th and 5th fingers

Dermatome T1

Medial elbow

Dermatome L1

Lateral hip/groin

Dermatome L2

anterior and medial thigh

Dermatome L3

Medial knee

Dermatome L4

Medial lower leg

Dermatome L5

lateral lower leg and dorsum of foot

Dermatome S1

Lateral and plantar foot

Dermatome S2

Popliteal fossa and posterior medial heel

Musculocutaneous (C5-C7) Peripheral Nerve Testing

Lateral forearm

Median (C5-C7, C8, T1) Peripheral Nerve Testing

Distal radial aspect, index finger

Ulnar (C8, T1 and some C7) Peripheral Nerve Testing

Distal ulnar side of 5th finger

Axillary (C5-C6) Peripheral Nerve Testing

Lateral arm, deltoid patch

Radial (C5-C8, T1) Peripheral Nerve Testing

Dorsal web space between thumb and index finger