Anatomy of the Lower Limb

Question 1

How many muscles in the anterior compartment of the thigh?

Answer 1

4
Thigh flexors: pectineus, iliopsoas, sartorious
Hip extensors: quadriceps femoris

Question 2

What nerve supplies the anterior compartment of the thigh?

Answer 2

Femoral nerve (L2-4)

Question 3

How many muscles in the medial compartment of the thigh?

Answer 3

5

Thigh adductors: adductor longus/brevis/magnus, obturator externus, gracilis

Question 4

What nerve supplies the medial compartment of the thigh?

Answer 4

Obturator nerve (L2-4), except for the hamstring part of the adductor magnus which is supplied by the tibial nerve

Question 5

How many muscles are in the posterior compartment of the thigh?

Answer 5

3

Thigh extensors/leg flexors: semitendinosus, semimembranosus, biceps femoris

Question 6

What nerve supplies the posterior compartment of the thigh?

Answer 6

Tibial division of the sciatic nerve (L5-S2), apart from the short head of the biceps femoris which is supplied by the common peroneal nerve

Question 7

How many muscles are in the superficial compartment of the gluteal region?

Answer 7

4

Gluteus maximus/medius/minimis + tensor fascia lata

Question 8

What nerve supplies the superficial compartment of the gluteal region?

Answer 8

All supplied by the superior gluteal nerve except from the gluteus maximus which is supplied by the inferior gluteal nerve

Question 9

How many muscles are in the deep compartment of the gluteal region?

Answer 9

5
Piriformis
Obturator Internus
Superior and inferior gemelli
Quadratus femoris

Question 10

What are the nerve supplies to the deep compartment of the gluteal region?

Answer 10

Piriformis = nerve to piriformis
Obturator internus = nerve to obturator internus
Superior gemelli = nerve to obturator internus
Inferior gemelli = nerve to quadratus femoris
Quadratus femoris = nerve to quadratus femoris

Question 11

How many muscles are in the anterior compartment of the lower leg?

Answer 11

4
Ankle dorsiflexors/toe extensors: tibialis anterior, extensor digitorum longus, extensor hallucis longus, fibularis tertius

Question 12

What nerve supplies the anterior compartment of the lower leg?

Answer 12

Deep peroneal/fibular nerve

Question 13

How many muscles are in the lateral compartment of the lower leg?

Answer 13

2

Foot evertors/plantar flexors: fibularis longus + fibularis brevis

Question 14

How many muscles are in the superficial compartment of the posterior region of the lower leg?

Answer 14

3

Plantar flexors of ankle: gastrocnemius, soleus + plantaris

Question 15

How many muscles in the deep compartment of the posterior region of the lower leg?

Answer 15

4

Toe flexors: popliteus, flexor hallucis longus, flexor digitorum longus, tibialis posterior

Question 16

What nerve supplies all of the posterior compartment of the lower leg?

Answer 16

Tibial nerve

Question 17

What two muscles make up the achilles/calcaneal tendon and what compartment of the lower leg are they found?

Answer 17

Gastrocnemius and soleus tendon

- found in the superficial compartment of posterior region of lower leg