Lower Regions myoderms and dermatomes

Question 1

L2 muscles tested

Answer 1

Iliopsoas
Rector femoris
Adductors
Gracilis

Question 2

L3 muscles tested

Answer 2

Vastus lateralis
Vastus medialis
Vastus intermedius
Rectus femoris

Question 3

L4 muscles tested

Answer 3

Tibial anterior

Question 4

L5 muscles tested

Answer 4

Extensor hallucis longus

Question 5

S1 muscles tested

Answer 5

Peroneal longus/brevis
Gastrocnemius/soleus

Question 6

S2 muscles tested

Answer 6

Gastrocnemius/soleus
Hamstring

Question 7

L2 key action

Answer 7

-adduction
-hip flexion

Question 8

L3 key action

Answer 8

Knee extension

Question 9

L4 key action

Answer 9

Dorsiflexion

Question 10

L5 key action

Answer 10

Great toe extension

Question 11

S1 key action

Answer 11

Eversion
Plantar flexion
Leg flexion

Question 12

S2 key actions

Answer 12

Planar flexion
Leg flexion

Question 13

L2 dermatomes

Answer 13

Upper anterior thigh to mid medial thigh

Question 14

L3 dermatomes

Answer 14

Upper anterior thing (below L2) to medial lateral aspect of knee (does not cross patella)

Question 15

L4 dermatomes

Answer 15

Front of thigh lateral to knee, down medial leg to medial foot to great toe

Question 16

L5 dermatomes

Answer 16

Anterolateral and lateral leg to dorsal of foot and web space (1-2)

Question 17

S1 dermatomes

Answer 17

Posterolateral leg/calf and lateral foot to 5th toe

Question 18

S2 dermatomes

Answer 18

Posterior thigh and calf (medial to S1)