Topic 5 - Muscles of the Thigh

Question 1

List the proximal and distal attachments for Sartorius

Answer 1

Proximal: Anterior superior iliac spine

Distal:

• Medial surface of the upper part of the shaft of the tibia
• Medial collateral ligament of the knee

Question 2

List the proximal and distal attachments for Rectus Femoris

Answer 2

Proximal:

• Anterior inferior iliac spine
• Ilium just superior to the acetabulum

Distal:

• Tibial tuberosity via the patellar ligament

Question 3

List the proximal and distal attachments for Vastus Lateralis

Answer 3

Proximal:

• Upper lateral part of the intertrochanteric line
• Lower border of the greater trochanter
• Lateral side of the gluteal tuberosity
• Upper half of the lateral lip of the linea aspera

Distal:

• Tibial tuberosity via the tendon of rectus femurs and the patella ligament
• Blends with the iliotibial tract

Question 4

List the proximal and distal attachments for Vastus Medialis

Answer 4

Proximal:

• Lower medial part of the intertrochanteric line
• Medial aspect of the proximal femoral shaft
• Medial lip of the linea aspera
• Upper two thirds of the medial supracondylar

Distal:

• Tibial tuberosity via the tendon of rectus femoris and the patellar ligament
• Medial condyle of the tibia

Question 5

List the proximal and distal attachments for Vastus Intermedius

Answer 5

Proximal:

• Upper two thirds of the anterior and lateral surfaces of the femur

Distal:

• Tibial tuberosity via the tendon of the rectus femoris and the patella ligament

Question 6

Deduce the actions of Sartorius

Answer 6

• Flexes and medially rotates leg at knee joint

- Assists in flexion, abduction and lateral rotation of thigh at hip jiont

Question 7

Deduce the actions of Rectus Femoris

Answer 7

• Extends leg at knee joint

- Flexes thigh at hip joint

Question 8

Deduce the actions of Vastus Lateralis

Answer 8

Extends leg at knee joint

Question 9

Deduce the actions of Vastus Medialis

Answer 9

Extends leg at knee joint

Question 10

Deduce the actions of Vastus Intermedius

Answer 10

Extends leg at knee joint

Question 11

Deduce the actions of Biceps Femoris

Answer 11

• Flexes and laterally rotates leg at knee joint

- Extends thigh at hip joint

Question 12

Deduce the actions of Semitendinosus

Answer 12

• Flexes and medially roates leg at knee joint

- Extends thigh at hip joint

Question 13

Deduce the actions of Semimembranosus

Answer 13

• Flexes and medially rotates leg at knee joint

- Extends thigh at hip joint