Lower extremity

Question 1

Gluteus Maximus

Answer 1

Origin: the gluteal surface of ilium, lumbar fascia, and sacrum
Insertion: gluteal tuberosity of the femur
Action: external rotation and extension of the hip joint

Question 2

Gluteus Medius

Answer 2

Origin: gluteal surface of ilium, under gluteus maximus
Insertion: greater trochanter of femur
Action: Abduction of the hip

Question 3

Gluteus Minimus

Answer 3

Origin: gluteal surface of ilium, under gluteus medius
Insertion: greater trochanter of femur
Action: abduction of the hip

Question 4

Piriformis

Answer 4

Origin: sacrum
Insertion: greater trochanter
Action: rotate laterally (outward) the thigh

Question 5

Psoas Major

Answer 5

Origin: transverse processes of T12-L5
Insertion: in the lesser trochanter of the femur
Action: flexes and rotates the thigh laterally

Question 6

Rectus femoris

Answer 6

Origin: anterior head: anterior iliac spine, Posterior head: ilium just above the acetabulum
Insertion: common quadriceps tendon into patella, tibial tuberosity via patellar ligament
Action: Knee extension

Question 7

Vastus medialis

Answer 7

Origin: medial aspect of linea aspera
Insertion: common quadriceps tendon into patella
Action: extends knee

Question 8

Vastus lateralis

Answer 8

Origin: lateral aspera of fmeur
Insertion: patella via the quadriceps tendon and tibial tuberosity via the patellar ligament
Action: extends and stabilizes the knee

Question 9

Vastus intermedius

Answer 9

Origin: anterior/lateral femur
Insertion: patellar ligament
Action: extends leg

Question 10

Sartorius

Answer 10

Origin: anterior illac spine
Insertion: Upper medial surface of body of tibia
Action: flexes hip and knee

Question 11

Gracialis

Answer 11

Origin: Body of pubis & inferior pubic ramus
Insertion: Proximal medial surface of tibia
Action: Flexes the knee and adducts the hip

Question 12

Adductor Magnus

Answer 12

Origin: Pubis, tuberosity of ischium
Insertion: femur
Action: Adduction of hip

Question 13

Semitendinous

Answer 13

Origin: Tuberosity of ischium
Insertion: tibia
Action: flexion of the knee

Question 14

Semimembranosus

Answer 14

Origin: Ischial tuberosity
Insertion: Medial surface of tibia
Action: Hip extension

Question 15

Biceps Femoris

Answer 15

Origin: Tuberosity of the ischium
Insertion: The head of the fibula which articulates with the back of the lateral tibial condyle
Action: Flexes knee joint

Question 16

Gastrocnemius

Answer 16

Origin: Superior to articular surfaces of lateral condyle of femur and medial condyle of femur
Insertion: Achilles tendon into mid-posterior calcaneus
Action: plantar flexion

Question 17

Soleus

Answer 17

Origin: upper fibula
Insertion: Calcaneal tendon
Action: plantar flexion

Question 18

Tibialis anterior

Answer 18

Origin: Body of tibia
Insertion: Medial cuneiform and first metatarsal bones of the foot
Action: dorsiflexion