m8: moina

Question 1

● Origin:
Straight head: anterior inferior iliac spine (AIIS)
Reflected head: ilium above acetabulum
● Insertion: Quadriceps tendon into patella, then via ligamentum patellae into tubercle of tibia (1)
● Nerve: Femoral nerve (1)
● Actions:
○ Extension of leg at knee joint (1)
○ Flexes thigh at hip joint

Answer 1

Rectus Femoris

Question 2

● Origin: Upper end and shaft of femur (1)
● Insertion: Quadriceps tendon into patella, then via ligamentum patellae into tubercle of tibia (2)
● Nerve: Femoral nerve (2)
● Actions:
○ Extension of leg at knee joint (2)

Answer 2

Vastus Lateralis

Question 3

● Origin: Upper end and shaft of femur (2)
● Insertion: Quadriceps tendon into patella, then via ligamentum patellae into tubercle of tibia (3)
● Nerve: Femoral nerve (3)
● Actions:
○ Extension of leg at knee joint (3)
○ Stabilizes patella

Answer 3

Vastus Medialis

Question 4

● Origin: Anterior and lateral surfaces of shaft of femur
● Insertion: Quadriceps tendon into patella, then via ligamentum patellae into tubercle of tibia (4)
● Nerve: Femoral nerve (4)
● Actions:
○ Extension of leg at knee joint (4)

Answer 4

Vastus Intermedius

Question 5

● Origin:
Long head: ischial tuberosity (1)
Short head: linea aspera, lateral supracondylar ridge of shaft of femur
● Insertion: Head of fibula
● Nerve:
Long head: tibial portion of sciatic nerve
Short head: common peroneal portion of sciatic nerve
● Actions:
○ Flexes and LATERALLY rotates leg at knee joint
○ Long head also extends thigh at hip
joint (1)

Answer 5

Biceps Femoris

Question 6

● Origin: Ischial tuberosity (2)
● Insertion: Medial condyle of tibia
● Nerve: Tibial portion of sciatic
nerve
● Actions:
○ Flexes and MEDIALLY rotates leg at knee joint (1)
○ Extends thigh at hip joint (2)

Answer 6

Semimembranosus

Question 7

● Origin: Ischial tuberosity (3)
● Insertion: Upper part of medial
surface of shaft of tibia
● Nerve: Tibial portion of sciatic
nerve (1)
● Actions:
○ Flexes and MEDIALLY rotates leg at knee joint (2)
○ Extends thigh at hip joint (3)

Answer 7

Semitendinosus

Question 8

● Origin: Ischial tuberosity (4)
● Insertion: Adductor tubercle of
femur
● Nerve: Tibial portion of sciatic
nerve (2)
● Actions:
○ Extends thigh at hip joint (4)

Answer 8

Adductor Magnus
(Hamstring Portion)