T2Q1 Thigh: Muscle Origin/ Insertion

Question 1

sartorius
origin:
insertion:
actions (3)

Answer 1

origin: ASIS
insertion: medial aspect of tibia
action (s) at thigh
1. flexes
2. abducts
3. laterally
*flexes the knee

Question 2

iliopsoas
origin:
insertion:
action (1)

Answer 2

origin:
T12-L5 verebrae
iliacus 
insertion: femur, lesser trochanter
action: flexes thigh at hip

Question 3

rectus femoris
origin:
insertion:
action (2)

Answer 3

origin: aiis
insertion: tibial tuberosity via patellar ligament
action:
1. flexes thigh
2. extends knee

Question 4

vastus lateralis
origin:
insertion:
action:

Answer 4

origin: linea aspera
insertion: tibial tubersoity
action: extends leg at knee joint

Question 5

vastus medialis
origin:
insertion:
action:

Answer 5

origin: linea aspera
insertion: tibial tuberosity via patellar ligament
action: extends leg at the knee joint

Question 6

vastus intermedius
origin:
insertion:
action:

Answer 6

origin: anteriolateral surfaces of femur
insertion: tibial tuberosity via patellar lig.
action: extends leg at knee joint

Question 7

tensor fascia latae
origin:
insertion:
action:

Answer 7

origin: ASIS
insertion: iliotibial tract
action: stabilizes pelvis and helps to keep the knee extended

Question 8

gluteus maximus
origin:
insertion:
action:

Answer 8

origin: sarcum/ ilium
insertion: iliotibial tract, gluteal tuberosity
action:
1. laterally rotates thigh at hip
2. extends thigh at hip

Question 9

gluteus medius
origin:
insertion:
action:

Answer 9

origin: ilium between anterior/ posterior glut. lines
insertion: greater trochanter of femur
1. ilium, between anterior and posterior gluteal lines
2. greater trochanter of femur
action:
1. abducts and medially rotates thigh at hip
2. steadies pelvis on leg when opposite leg is raised

Question 10

gluteus minimus
origin:
insertion:
action:

Answer 10

origin: ilium between anterior/ posterior glut. lines
insertion: greater trochanter of femur
action:
1. abducts and medially rotates thigh at hip
2. steadies pelvis on leg when opposite leg is raised

Question 11

piriformis
origin:
insertion:
action:

Answer 11

origin: anterior sacrum
insertion: femura, greater trochanter
action: laterally rotates thigh at hip

Question 12

obturator internus
origin:
insertion:
action:

Answer 12

origin: internal surface of obturator membrane
insertion: femur, greater trochanter
action: laterally rotates thigh at hip

Question 13

quadratus femoris
origin:
insertion:
action:

Answer 13

origin: ischial tuberosity
insertion: quadrate tubercle of femur
action: laterally rotates thigh at hip

Question 14

gemelli (superior/ inferior)

Answer 14

origin: lesser sciatic notch
insertion: femur, greater trochanter
action: laterally rotates thigh at hip

Question 15

biceps femoris

Answer 15

long head: ischial tuberosity, inferiomedial part
short head: linea apsera

insertion: head of fibula

action:
1. flexes knee
2. foot on ground: extends high at hip
3. foot off ground: medilaly rotates thigh and leg at knee joint

Question 16

semitendinosus

Answer 16

origin: ischial tuberosity, inferiomedial part
insertion: medial surface of proximal tibia

action:
1. flex leg at knee joint extends thigh at hip
2. medialy rotate thigh at hip joint and leg at knee joint

Question 17

semimembranosus

Answer 17

origin: ischial tuberosity, superolateral impression
insertion: medial tibial condyle

action:
1. flex leg at knee joint extends thigh at hip
2. medialy rotate thigh at hip joint and leg at knee joint