Anatomy Exam Anatomy Muscles of the Lower Limb 2

Question 1

What is the primary function of the tibialis anterior muscle?

Accepted Answer

Dorsiflexion and inversion

Answer

The tibialis anterior dorsiflexes and inverts the foot.

Question 2

Which muscle is the largest and most powerful adductor of the thigh?

Accepted Answer

Adductor magnus

Answer

The adductor magnus is the largest and most powerful adductor of the thigh, with both adductor and hamstring portions.

Question 3

The peroneus (fibularis) longus muscle inserts into which structure?

Accepted Answer

Medial cuneiform and base of 1st metatarsal

Answer

The peroneus longus wraps under the plantar surface of the foot to insert at the medial cuneiform and base of the 1st metatarsal.

Question 4

What is the action of the popliteus muscle?

Accepted Answer

Unlocks the knee by medially rotating the tibia on the femur

Answer

The popliteus 'unlocks' the fully extended knee by medially rotating the tibia (or laterally rotating the femur).

Question 5

The sartorius muscle is innervated by which nerve?

Accepted Answer

Femoral nerve

Answer

The sartorius is innervated by the femoral nerve (L2, L3).

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