Muscle Actions

Question 1

Masseter

Answer 1

elevation of the mouth, protraction of the mandible

Question 2

Splenius

Answer 2

Extends head and neck

Question 3

Sternocleidomasteoid

Answer 3

Flexion of head and neck; rotation of head to opposite side

Question 4

Pectoralis Major

Answer 4

Medial rotation and addiction of arm at the shoulder

Question 5

Coracobrachialis

Answer 5

Flexes and adducts arm at shoulder

Question 6

Lastissimus Dorsi

Answer 6

Adduction, medial rotation, extension of arm at shoulder

Question 7

Deltoid

Answer 7

Flexion, medial rotation, abduction of arm at shoulder

Question 8

Infraspinatus

Answer 8

Lateral rotation at shoulder

Question 9

Supraspinatus

Answer 9

Abduction of arm at shoulder

Question 10

Teres Major

Answer 10

Adduction, medial rotation, extension of arm at shoulder

Question 11

Teres Minor

Answer 11

Lateral rotation, weak adduction of arm at shoulder

Question 12

Subscapularis

Answer 12

Medial rotation of arm at shoulder

Question 13

Pectoralis Minor

Answer 13

Draws scapula forward and down

Question 14

Serratus Anterior

Answer 14

abduction and upward rotation of scapula

Question 15

Trapezius

Answer 15

Upper rotation of scapula, extension of neck

Question 16

Rhomboideus

Answer 16

Retraction and elevation of scapula

Question 17

Triceps Brachii

Answer 17

Extend arm and forearm

Question 18

Biceps Brachii

Answer 18

Flex arm at shoulder

Question 19

Brachialis

Answer 19

Flexes forearm

Question 20

Extensor Carpi Radialis

Answer 20

Extension and abduction of wrist

Question 21

Extensor Carpi Ulnaris

Answer 21

Extends and adducts wrist

Question 22

Flexor Carpi Radialis

Answer 22

Flexes and adducts wrist

Question 23

Flexor Carpi Ulnaris

Answer 23

Flexes and adducts wrist

Question 24

Flexor Digitorum

Answer 24

Flexes distal phalanges, flexes hand

Question 25

Extensor Digitorum

Answer 25

Extends medial 4 phalanges, extends hand at wrist

Question 26

Rectus Abdominus

Answer 26

Flexes vertebral column, compress abdomin

Question 27

External Oblique

Answer 27

Flexes vertebral column, rotates vertebral column, laterally flexes vertebral column

Question 28

Internal Oblique

Answer 28

Flexes, rotates, lateral flexion of vertebral column

Question 29

Transverse Abdominus

Answer 29

Compresses abdomin

Question 30

Tensor fascia lata

Answer 30

Stabilizes hip by putting tension on IT band

Question 31

Gluteus Maximus

Answer 31

Extends and abducts hip

Question 32

Gluteus Medius

Answer 32

Major abductor of thigh

Question 33

Adductor Longus

Answer 33

Adduction and flexion of thigh

Question 34

Adductor Brevis

Answer 34

Adduction and flexion of thigh

Question 35

Adductor Magnus

Answer 35

Flex, extend, and adduction of thigh

Question 36

Psoas Major

Answer 36

Flexes torso and thigh

Question 37

Iliacus

Answer 37

Flexes torso and thigh

Question 38

Biceps Femoris

Answer 38

Flexes the knee, extends the hip

Question 39

Semitendonosis

Answer 39

Flexes knee, extends hip

Question 40

Semimembranosis

Answer 40

Flexes knee, extends hip

Question 41

Gracilis

Answer 41

Flexes knee, adducts the hip

Question 42

Sartorius

Answer 42

Flex and lateral rotation of hip, flex knee

Question 43

Rectus Femoris

Answer 43

Extends knee

Question 44

Vastus Lateralis

Answer 44

Extends knee

Question 45

Vastus Medialis

Answer 45

Extends knee

Question 46

Vastus Intermedius

Answer 46

Extends knee

Question 47

Gastrocnemius

Answer 47

Plantarflexion

Question 48

Soleus

Answer 48

Plantarflexion

Question 49

Tibialis Anterior

Answer 49

Dorsi flexion

Question 50

Flexor digitorum Longus

Answer 50

Plantarflexion, flexes 2-5 toes

Question 51

Peroneus Longus

Answer 51

E version and plantarflexion

Question 52

Peroneus Tertius

Answer 52

Eversion and dorsiplexion

Question 53

Extensor Digitorum Longus

Answer 53

Extends toes 2-5, Dorsi flexion