Anatomy Quiz: Muscles of Gluteal Region and Back of Thigh

Which muscle is located in the proximal anterolateral thigh?

• Semimembranosus

• Tensor fasciae latae

• Gluteus maximus

• Piriformis

What is the action of Gluteus maximus?

• Flexion of thigh on the trunk at the hip joint

• Medial rotation of the thigh at the hip joint

• Abduction of the thigh at the hip joint

• Extension of thigh on the trunk at the hip joint

Which muscle is responsible for lateral rotation of the thigh at the hip joint?

• Gluteus maximus

• Semitendinosus

• Quadratus femoris

• Obturator externus

What is the origin of Semitendinosus muscle?

• Ischial tuberosity

• Anterior part of iliac crest

• External surface of ilium

• Ischial tuberosity + sacrotuberous ligament

Which nerve supplies the Gluteus maximus muscle?

• Sciatic nerve

• Obturator nerve

• Superior gluteal nerve

• Inferior gluteal nerve

What is the insertion point of Gluteus medius muscle?

• Side of both sacrum & coccyx

• Lateral surface of greater trochanter of femur

• External surface of ilium

• Groove behind the medial tibial condyle

Which muscle is NOT supplied by branches from sacral plexus?

• Obturator externus

• Quadratus femoris

• Gluteus maximus

• Piriformis

What is the action of Semimembranosus muscle?

• Lateral rotation of the thigh at the hip joint

• Medial rotation of the semi flexed leg at the knee joint

• Flexion of the leg at the knee joint

• Extension of the thigh at the hip joint

Which muscle prevents the pelvis from tilting to the unsupported side during standing on one limb?

• Gluteus maximus

• Gluteus medius

• Tensor fasciae latae

• Gluteus minimus

What is the insertion point of Semimembranosus muscle?

• SGS area (upper part of medial surface of the tibia)

• Quadrate tubercle

• Groove behind the medial tibial condyle

• Head of fibula