Lower Limb Anatomy

Question 1

Which nerve roots are elicited by the ankle reflex

Answer 1

S1/S2

Question 2

What are the nerve roots of the obturator nerve

Answer 2

L2-L4

Question 3

Describe the course of the obturator nerve

Answer 3

Originates from L2-L4, passes through the fibres of the psoas major, then travels posterior to the common iliac and then through the obturator canal into the medial compartment where it divided into an anterior and posterior division

Question 4

Which muscles do the anterior and posterior division of the obturator nerve supply

Answer 4

Anterior division - Supplies adductor longus, brevis, gracilis and pectinius - then pierces the fascia lata to become the cutaneous branch

Posterior division - Supplie the adductor brevis and Magnus