Muscle function

Question 1

External oblique

Answer 1

Compresses and supports abdominal viscera, flexes and rotates trunk

Question 2

Internal oblique

Answer 2

Compresses and supports, abdominal viscera, flexes and rotates trunk

Question 3

Transversus abdominus

Answer 3

Compresses and supports abdominal viscera

Question 4

Rectus abdominus

Answer 4

Flexes trunk and tenses linea alba

Question 5

Pyramidalis

Answer 5

Tenses linea alba

Question 6

Cremaster

Answer 6

Suspends testis and its action is of value in the cremasteric reflex

Question 7

Iliacus

Answer 7

flexes hip and stabilizes hip joint, acts with psoas major

Question 8

Psoas major

Answer 8

flexes hip and trunk with iliacus; flexes vertebral column laterally; used to balance trunk in sitting position

Question 9

Psoas minor

Answer 9

flexes pelvis on vertebral column

Question 10

Quadratus lumborum

Answer 10

extends and laterally flexes vertebral column, flexes 12th rib during inspiration

Question 11

Extensor hallucis brevis

Answer 11

Extends four medial digits

Question 12

Extensor digitroum brevis

Answer 12

Extends four medial digits

Question 13

Abductor hallucis

Answer 13

Abducts and flexes first digit

Question 14

Flexor digitorum brevis

Answer 14

Flexes 2-5 digits

Question 15

Abductor digiti minimi

Answer 15

Abducts and flexes fifth digit

Question 16

Quadratus plantae

Answer 16

Correccts pull of flexor digitorum longus tendon (resulting in straight pulling of the toes)

Question 17

Lumbricales

Answer 17

Flexion / Extension

Question 18

Flexor hallucis brevis

Answer 18

Flexes first digit

Question 19

Adductor hallucis

Answer 19

Adducts first digit (maintains transverse arch of foot)

Question 20

Flexor digiti minimi brevis

Answer 20

Flexes fifth digit

Question 21

Interossei muscles

Answer 21

Adducts digits 2-4, flexion, and extends phalanges

Question 22

Tibialis anterior

Answer 22

Dorsiflexes foot at ankle and inverts foot

Question 23

Extensor digitorum longus

Answer 23

Extends lateral four digits

Question 24

Extensor hallucis longus

Answer 24

Extends great toe, dorsiflexes foot at ankle

Question 25

F. P. tertius

Answer 25

Dorsiflexes foot at ankle and aids in eversion of foot

Question 26

F. P. longus

Answer 26

Everts foot and weakly plantar flexes foot at ankle

Question 27

F. P. brevis

Answer 27

Everts foot and weakly plantar flexes foot at ankle

Question 28

Tibialis posterior

Answer 28

Plantar flexes foot at ankle and inverts foot

Question 29

Gastrocneumius

Answer 29

Plantar flexes foot at ankle joint, assists flexion of knee joint, raises heel during walking

Question 30

Soleus

Answer 30

Plantar flexes foot at ankle, stabilizes leg over foot

Question 31

Plantaris

Answer 31

weakly assists gastrocnemius

Question 32

Popliteus

Answer 32

weakly flexes knee and unlocks it by rotating femur on fixed tibia

Question 33

Flexor digitorum longus

Answer 33

Flexes lateral four digits and plantar flexes foot at ankle, supports longitudinal arches of foot

Question 34

Flexor hallucis longus

Answer 34

flexes joints of great toe, weakly plantar flexes foot at ankle

Question 35

Rectus femoris

Answer 35

Extends leg at knee joint and flexes thigh at hip joint (quad)

Question 36

V. medialis

Answer 36

Extends leg at knee joint

Question 37

V. lateralis

Answer 37

Extends leg at knee joint

Question 38

V. intermedius

Answer 38

Extends leg a knee joint

Question 39

Iliacus

Answer 39

Flexes thigh at hips and stabilizes hip joint, acts with psoas major

Question 40

Pectineus

Answer 40

Adducts and flexes thigh at hip

Question 41

Obturator externus

Answer 41

Laterally rotates thigh, stabilizes head of femur in acetabulum

Question 42

Gracilis

Answer 42

Adducts thigh, flexes and medially rotates leg

Question 43

Adductor longus

Answer 43

Adducts thigh at hip

Question 44

Adductor brevis

Answer 44

Adducts thigh at hip, weak hip flexor

Question 45

Adductor magus

Answer 45

Adducts thigh at hip

Question 46

Psoas major

Answer 46

Flexes hip; flexes trunk; flexes vertebral laterally

Question 47

Gemellus superior

Answer 47

Latearly rotates extended thigh at hip

Question 48

Gemellus inferior

Answer 48

Abducts flexed thigh at hip

Question 49

Piriformis

Answer 49

Abducts flexed thigh at hip

Question 50

Gluteus minimus

Answer 50

Abducts and medially rotates thigh at hips, steadies pelvis on leg when opposite leg is raised

Question 51

Gluteus medius

Answer 51

Abducts and medially rotates thigh at hips, steadies pelvis on leg when opposite leg is raised

Question 52

Gluteus maximus

Answer 52

Extends flexed thigh, assists in lateral rotation, abducts thigh

Question 53

Quadratus femoris

Answer 53

Laterally rotates thigh at hip

Question 54

Tensor fascia lata

Answer 54

Abducts and flexes thigh at hip; helps to keep knee extended

Question 55

Semitendinosus

Answer 55

Flexes leg, extends thigh

Question 56

Semimembranosus

Answer 56

Flexes leg, extends thigh

Question 57

Biceps femoris

Answer 57

Flexes and laterally rotates leg, extends thigh at hip

Question 58

Articularis genus

Answer 58

Pulls suprapatella bursa superiorly with extension of the knee