Muscle power testing

Question 1

What is the muscle, nerve & nerve root for knee extension?

Answer 1

Quadriceps femoris
Femoral nerve
L2, 3, 4

Question 2

What is the muscle, nerve & nerve root for knee flexion?

Answer 2

Hamstrings
Tibial division of sciatic (except short head of biceps femoris which is common peroneal)
L5, S1, 2

Question 3

What is the muscle, nerve & nerve root for hip flexion?

Answer 3

Iliopsoas
Lumbar sacral plexus
L1, 2, 3

Question 4

What is the muscle, nerve & nerve root for hip extension?

Answer 4

Gluteus maximus & hamstrings
Inferior gluteal
L5, S1, 2

Question 5

What muscle, nerve & nerve root abduct the hip?

Answer 5

Gluteus medius, minimus & tensor fascia latae
Superior gluteal
L4, 5, S1

Question 6

What muscle, nerve & nerve root adduct the hip?

Answer 6

Adductor longus, brevis, magnus & gracilis
Obturator
L2, 3, 4

Question 7

What muscle, nerve & nerve root dorsiflex the ankle?

Answer 7

Tibialis anterior
Deep peroneal
L4, 5, S1

Question 8

What muscle, nerve & nerve root plantarflex the ankle?

Answer 8

Gastrocnemius, soleus
Tibial
S1, 2

Question 9

What muscle, nerve & nerve root invert the foot?

Answer 9

Tibialis posterior
Tibial
L4, 5

Question 10

What muscle, nerve & nerve root evert the foot?

Answer 10

Peroneal longus & brevis
Superficial peroneal
L5, S1, 2

Question 11

What muscle, nerve & nerve root extend (dorsiflex) the hallux?

Answer 11

Extensor hallucis longus
Deep peroneal
L5, S1

Question 12

What muscle, nerve & nerve root flex (plantarflex) the hallux?

Answer 12

Flexor hallucis longus & brevis
Tibial
S2, 3

Question 13

What muscle, nerve & nerve root extend the lesser toes?

Answer 13

Extensor digitorum longus & brevis
Deep peroneal
L5, S1

Question 14

What muscle, nerve & nerve root flex the lesser toes?

Answer 14

Flexor digitorum longus & brevis
Tibial
S2, 3