Reflexes, Myotomes, Dermatomes

Myotome: C1-C2

resisted cervical flexion

Myotome: C3-C4

resisted shoulder shrug

Myotome: C5

resisted shoulder abduction

Myotome: C5-C6

resisted elbow flexion (supinated)

Myotome: C6-C7

resisted wrist extension

Myotome: C7

resisted elbow extension

Myotome: C7-C8

resisted wrist flexion

Myotome: C8-T1

resisted full finger flexion

Myotome: T1

resisted finger abduction/adduction

Myotome: L1-L3

resisted hip flexion

Myotome: L3-L4

resisted knee extension

Myotome: L4-L5

resisted DF + inversion

Myotome: L5

resisted great toe extension

Myotome: L5-S1

resisted plantarflexion and eversion

Myotome: S1-S2

resisted plantarflexion (calf raise)

Dermatome: C3

lateral side of neck

Dermatome: C4

top of shoulder to acromion

Dermatome: C5

lateral deltoid

Dermatome: C6

anterolateral forearm to tip of thumb

Dermatome: C7

middle phalanx

Dermatome: C8

lateral side of pinky

Dermatome: T1

medial forearm to elbow

Dermatome: T2

medial upper arm to axilla

Dermatome: L1

inguinal region

Dermatome: L2

anterior mid thigh

Dermatome: L3

medial knee joint

Dermatome: L4

medial lower leg and foot

Dermatome: L5

anterolateral leg to dorsum of foot

Dermatome: S1

Lateral side of the foot

Dermatome: S2

mid-posterior thigh and calf

Biceps reflex

C5-C6 - musculocutaneous nerve

Brachioradialis reflex

C6: radial nerve

Triceps reflex

C7- Radial nerve

Patellar Reflex

L3-L4: femoral nerve

Hamstrings reflex

L5-S1: tibial branch of the sciatic nerve

Achilles reflex

S1-S2: tibial nerve