Anatomy Exam Joints of the Lower Limb 2

Question 1

Which structure forms the acetabular labrum's primary function in the hip joint?

Accepted Answer

Deepens the socket and improves stability

Answer

The acetabular labrum deepens the acetabular socket, increasing joint congruency and stability while also creating a negative pressure seal.

Question 2

The zona orbicularis of the hip joint capsule is best described as:

Accepted Answer

Circular fibers that grip the femoral neck

Answer

The zona orbicularis consists of circular capsular fibers that encircle the femoral neck, helping retain the femoral head in the acetabulum.

Question 3

Which nerve is most at risk during a posterior surgical approach to the hip?

Accepted Answer

Sciatic nerve

Answer

The sciatic nerve passes posterior to the hip joint and is the structure most at risk during posterior hip surgery or posterior hip dislocation.

Question 4

The ligament of the head of the femur (ligamentum teres) transmits which artery in adults?

Accepted Answer

Obturator artery branch

Answer

The ligamentum teres carries a branch of the obturator artery to the femoral head, though its contribution to femoral head vascularity is minor in adults.

Question 5

During hip abduction, which ligament becomes taut to limit excessive movement?

Accepted Answer

Pubofemoral ligament

Answer

The pubofemoral ligament, oriented horizontally, tightens during abduction and external rotation to limit excessive hip abduction.

Anatomy Exam Practice Test

Anatomy Exam Practice Test

Anatomy Exam Joints of the Lower Limb 2