knee

Question 1

Rectus femoris

1) origin
2) insertion
3) action

Answer 1

1) AIIS & superior margin of acetabulum
2) patella & tibial tuberosity via patella ligament
3) extends leg and flexes thigh

Question 2

Vastus lateralis

1) origin
2) insertion
3) action

Answer 2

1) greater trochanter, intertrochanteric line & linea aspera
2) patella and tibial tuberosity via patella ligament
3) extends leg and stabilises knee

Question 3

Vastus medialis

1) origin
2) insertion
3) action

Answer 3

1) linea aspera, medial supracondylar line, intertrochanteric line
2) patella & tibial tuberosity via patella ligament
3) extends leg and stabiles knee

Question 4

Vastus intermedialis

1) origin
2) insertion
3) action

Answer 4

1) anterior and lateral surfaces of proximal femur shaft
2) patella & tibial tuberosity via patella ligament
3) extends leg

Question 5

Gracilis

1) origin
2) insertion
3) action

Answer 5

1) ischiopubic ramus
2) medial surface of tibia, below condyle
3) adducts thigh and medically rotates thigh & flexes knee

Question 6

Bicep femoris

1) origin
2) insertion
3) action

Answer 6

1) long head: ischial tuberosity Short head: lateral supracondylar line, linea aspera.
2) head of fibula
3) flexes knee, laterally rotates knee

Question 7

Semitendinosis

1) origin
2) insertion
3) action

Answer 7

1) ischial tuberosity
2) medial aspect of upper tibia
3) extends thigh and medically rotates knee

Question 8

Semimembranosis

1) origin
2) insertion
3) action

Answer 8

1) ischial tuberosity
2) medial condyle of tibia
3) extends thigh & medially rotates knee

Question 9

Popliteus

1) origin
2) insertion
3) action

Answer 9

1) lateral condyle of femur & lateral meniscus of knee
2) proximal tibia
3) flexes and rotates leg laterally to unlock knee

Question 10

Gastrocnemius

1) origin
2) insertion
3) action

Answer 10

1) by 2 heads from medial and lateral condyle of the femur
2) posterior calcaneus via Calcaneus tendon
3) plantar flexes foot & crosses knee joint so can flex leg

Question 11

Sartorius

1) origin
2) insertion
3) action

Answer 11

1) ASIS
2) winds around medial aspect of knee and inserts into medial aspect of proximal tibia
3) flexes knee, while flexed can medially rotate knee

( in football kick and produce cross-legged position)