Register

Gross Anatomy Dry Laboratory Lower Body Practice Test

Access More Questions
The posterior division of the obturator nerve provides innervation to which portion of the adductor magnus?
Correct Answer:
Adductor Portion
Explanation:
The adductor magnus has two parts with different nerve supplies. The part that adducts the thigh (the adductor portion) receives motor fibers from the obturator nerve, specifically its posterior division. The other part, which is the hamstring portion, is supplied by the tibial portion of the sciatic nerve. So, the posterior division of the obturator nerve innervates the adductor portion of the adductor magnus. This dual innervation explains why hip adduction can be affected by obturator nerve injury (to the adductor part) while the hamstring-associated actions rely on the sciatic nerve.

Access more questions from this quiz

Continue to Gross Anatomy Dry Laboratory Lower Body Practice Test for more practice questions and the full quiz experience.

Access More Questions