Exam 3: Knee

Question 1

Rectus Femoris

Answer 1

 Origin: anterior head = AIIS posterior head = upper margin of acetabulum
 Insertion: top of patella to the tibial tuberosity, by way of the patellar tendon
 Action: hip flexion, knee extension, anterior pelvic rotation

Question 2

Vastus L, M, I

Answer 2

Vastus Lateralis Origin: intertrochanteric line, anterior/inferior part of greater trochanter, upper ½ of linea aspera
Vastus Medialis Origin: medial condyloid ridge, linea aspera
Vastus Intermedius Origin: upper anterior 2/3rds surface of femur
Insertion: Tibial Tuberosity
Action: Knee extension

Question 3

Gastrocnemius

Answer 3

 Origin: medial head=posterior side of medial condyle of femur lateral head=posterior side of lateral condyle of femur
 Insertion: Achilles tendon to posterior side of calcaneous
 Action: knee flexion, plantar flexion

Question 4

Popliteus

Answer 4

 Origin: posterior part of lateral condyle of femur
 Insertion: upper posterior-medial part of tibia
 Action: knee flexion, knee internal rotation

Question 5

Plantaris

Answer 5

 Origin: lateral condyle of femur
 Insertion: Achilles tendon to calcaneous
 Action: assists in knee flexion, plantar flexion