Muscles of The Thigh

Question 1

Rectus Femoris

Answer 1

O: Anterior inferior iliac spine

I: Base of the patella and, via the patellar tendon, the tibial tuberosity

A: Extends knee and flexes hip

Inv: Femoral

Question 2

Vastus Lateralis

Answer 2

O: Upper region of intertrochanteric line, greater trochanter, lateral region of the gluteal tuberosity, lateral lip of the linea aspera

I: Lateral capsule of the knee, base of the patella, and, via the patellar tendon, the tibial tuberosity

A: Extends knee

Inv: Femoral

Question 3

Vastus Medialis

Answer 3

O: Lower region of intertrochanteric line, medial lip of linea aspera, proximal medial supracondylar line

I: Medial capsule of the knee, base of the patella, and, via the patellar tendon, the tibial tuberosity

A: Extends knee

Inv: Femoral

Question 4

Vastus Intermedius

Answer 4

O: Anterior-lateral regions of the upper two thirds of the femoral shaft

I: Lateral base of the patella, and, via the patellar tendon, the tibial tuberosity

A: Extends knee

Inv: Femoral

Question 5

Sartorius

Answer 5

O: Anterior superior iliac Spine

I: Medial surface of tibia

A: Hip flexion, abduction, lateral rotation, Knee flexion

Inv: Femoral

Question 6

Pectineus

Answer 6

O: Pectineal line on superior pubic ramus

I: Pectineal (spiral) line on the posterior surface of the femur

A: Hip flexion, adduction, medial rotation

Inv: Femoral

Question 7

Adductor Longus

Answer 7

O: Body of pubis

I: Middle one third of the linea aspera

of the femur

A: Hip adduction, flexion, medial
rotation

Inv: Obturator

Question 8

Adductor Brevis

Answer 8

O: Inferior pubic ramus

I: Proximal one third of the linea aspera of the femur

A: Hip adduction, flexion, medial rotation

Inv: Obturator

Question 9

Adductor Magnus

Answer 9

O: Ischial ramus and ischial tuberosity

I: Linea aspera and adductor tubercle of femur

A: Hip adduction, extension, medial rotation

Inv: Obturator and tibial portion of sciatic nerve

Question 10

Gracilis

Answer 10

O: Lower body of pubis and inferior ramus of pubis

I: Medial surface of tibia

A: Hip flexion, medial rotation, adduction And flexion of knee

Inv: Obturator

Question 11

Gluteus Maximus

Answer 11

O: Outer ilium, posterior gluteal line, thoracolumbar
fascia, posterior side of sacrum and coccyx

I: Gluteal tuberosity and iliotibial band

A: Hip extension & external rotation
Secondary action: Hip adduction

Inv: Inferior gluteal

Question 12

Gluteus Medius And Gluteus Minimus

Answer 12

O: Ilium

I: Greater trochanter

A: Abduction of hip
Assist in medial and lateral rotation of hip

Inv: Superior gluteal

Question 13

Tensor Fasciae Latae

Answer 13

O: Iliac crest and anterior superior iliac spine

I: Proximal one third of the iliotibial band of the fascia lata

A: Flex, abduct, medially rotate hip

Inv: Superior gluteal

Question 14

Piriformis

Answer 14

O: Anterior side of sacrum

I: Apex of the greater trochanter

A: Lateral rotators of hip

Inv: Nerve to the piriformis

Question 15

Biceps Femoris

Answer 15

O:
- Long head: ischial tuberosity
- Short head: lateral lip of the linea aspera

I: Fibular head

A: Flex knee, extend hip

Inv: Sciatic/Tibial Nerve

Question 16

Semimembranosus

Answer 16

O: Ischial tuberosity

I: Medial condyle of tibia

A: Flex knee, extend hip

Inv: Sciatic

Question 17

Semitendinosus

Answer 17

O: Ischial tuberosity

I: Medial surface of tibia

A: Flex knee, extend hip

Inv: Sciatic