A&P Lab Lower Extremity Muscles

Question 1

Origin of Iliopsoas M

Answer 1

Iliacus- Iliac Fossa
Psoas Major- Lateral bodies and transverse processes of L1-L5

Question 2

Insertion of Iliopsoas M

Answer 2

Lesser Trochanter of femur

Question 3

Action of Iliopsoas M

Answer 3

Hip flexion, external rotation, ipsilateral lumbar flexion, anterior pelvic rotation

Question 4

Origin of Tensor Fasciae Latae M

Answer 4

Anterior iliac crest, ASIS

Question 5

Insertion of Tensor Fasciae Latae M

Answer 5

Iliotibial tract

Question 6

Action of Tensor Fasciae Latae M

Answer 6

Hip abduction, internal rotation, weak hip flexion

Question 7

Origin of Sartorius M

Answer 7

ASIS

Question 8

Insertion of Sartorius M

Answer 8

Pes Anserine

Question 9

Action of Sartorius M

Answer 9

Hip flexion, Hip external rotation, knee flexion

Question 10

Origin of Gracilis M

Answer 10

Inferior ramus of pubis

Question 11

Insertion of Gracilis M

Answer 11

Pes Anserine

Question 12

Action of Gracilis

Answer 12

Knee flexion, HIp internal rotation, Hip adduction

Question 13

Origin of Pectineus M

Answer 13

Superior ramus of pubis

Question 14

Insertion of Pectineus M

Answer 14

Pectineal line of femur

Question 15

Action of Pectineus

Answer 15

Hip adduction, flexion

Question 16

Origin of Adductors (longus, brevis, magnus) M

Answer 16

Inferior ramus of pubis, ischial tuberosity

Question 17

Insertion of Adductors

Answer 17

Linea aspera, adductor tubercle of femur

Question 18

Action of adductors

Answer 18

Hip adduction, external rotation

Question 19

Origin of Gluteus Maximus M

Answer 19

Posterior iliac crest, sacrum, coccyx

Question 20

Insertion of Gluteus Maximus

Answer 20

Gluteal tuberosity of femur

Question 21

Action of Gluteus Maximus

Answer 21

Hip Extension, external rotation, Posterior pelvic rotation

Question 22

Origin of Gluteus Medius and Minimus M

Answer 22

Lateral surface of ilium

Question 23

Insertion of Gluteus Medius and Minimus M

Answer 23

Greater trochanter of femur

Question 24

Action of Gluteus medius and minimus

Answer 24

internal rotation (minimus), external rotation (medius), hip abduction

Question 25

Lateral/External rotators M

Answer 25

Piriformis, gemellus superior, gemellus inferior, obturator internus, obturator externus, quadratis femoris

Question 26

origin of lateral/external rotator muscles

Answer 26

anterolateral sacrum, ischial spine and tuberosity, obturator foramen

Question 27

insertion of lateral/external rotator muscles

Answer 27

greater trochanter of femur

Question 28

Action of lateral/external rotator M

Answer 28

Hip external rotation

Question 29

origin rectus femoris m

Answer 29

AIIS, superior acetabulum

Question 30

Insertion of rectus femoris m

Answer 30

tibial tuberosity

Question 31

action of rectus femoris

Answer 31

knee extension, hip flexion

Question 32

origin of vastus lateralis m

Answer 32

intertrochanteric line of femur, proximal half of linea aspera

Question 33

insertion of vestus lateralis m

Answer 33

tibial tuberosity

Question 34

action of vests lateralis

Answer 34

knee extension

Question 35

origin vastus medialis m

Answer 35

linea aspera of femur

Question 36

insertion of vastus medialis

Answer 36

tibial tuberosity

Question 37

action of vastus medialis

Answer 37

knee flexion

Question 38

origin of vastus intermedius

Answer 38

proximal anterior surface of femur

Question 39

insertion of vastus intermedius

Answer 39

tibial tuberosity

Question 40

action of vastus intermedius

Answer 40

knee extension

Question 41

origin of biceps femoris

Answer 41

long head- ischial tuberosity short head- distal half linea aspera of femur

Question 42

insertion of biceps femoris

Answer 42

head of fibula, lateral condyle of tibia

Question 43

action of biceps femoris

Answer 43

long head-hip extension, external rotation, posterior pelvic rotation both- knee flexion, external rotation

Question 44

origin of semitendinosus M

Answer 44

ischial tuberosity

Question 45

insertion of semitendinosus m

Answer 45

pes anserine

Question 46

origin of semimembranosus

Answer 46

ischial tuberosity

Question 47

insertion of semimembranosus

Answer 47

medial condyle of tibia

Question 48

action of semimembranosus

Answer 48

knee flexion, hip extension, internal rotation of hip and tibia, posterior pelvic rotation

Question 49

origin of popliteus m

Answer 49

lateral condyle of femur

Question 50

insertion of popliteus m

Answer 50

proximal posteromedial tibia

Question 51

action of popliteus

Answer 51

knee flexion, internal rotation of tibia

Question 52

origin of gastrocnemius

Answer 52

medial head- medial condyle of femur lateral head- lateral condyle of femur

Question 53

insertion of gastrocnemius

Answer 53

calcaneus

Question 54

action of gastrocnemius

Answer 54

ankle plantar flexion, knee flexion

Question 55

origin of soleus

Answer 55

posterior proximal fibula and tibia

Question 56

insertion of soleus

Answer 56

calcaneus

Question 57

action of soleus

Answer 57

ankle plantarflexion

Question 58

origin of tibialis anterior m

Answer 58

lateral condyle, proximal anterior portion of tibia

Question 59

insertion of tibialis anterior

Answer 59

medial cuneiform, 1st metatarsal

Question 60

action of tibialis anterior

Answer 60

ankle dorsiflexion, foot inversion