Muscle Actions (with number hints)

Question 1

which muscles flex the shoulder? 3

Answer 1

deltoid (anterior fibers)
biceps brachii
pectoralis major (upper fibers)

Question 2

which muscles extend the shoulder? 5

Answer 2

teres major
deltoid (posterior fibers)
latissimus dorsi
triceps brachii (long head)
pectoralis major (lower fibers)

Question 3

which muscles abduct the shoulder? 2

Answer 3

supraspinatus
deltoid (all fibers)

Question 4

which muscles adduct the shoulder? 6

Answer 4

teres major
infraspinatus
teres minor
latissimus dorsi
triceps brachii (long head)
pectoralis major (all fibers)

Question 5

which muscles horizontally abduct the shoulder? 1

Answer 5

deltoid (posterior fibers)

Question 6

which muscles horizontally adduct the shoulder? 2

Answer 6

deltoid (anterior fibers)
pectorals major (upper fibers)

Question 7

which muscles medially rotate the shoulder? 5

Answer 7

teres major
subscapularis
deltoid (anterior fibers)
latissimus dorsi
pectoralis major (all fibers)

Question 8

which muscles stabilize the head of the humerus in the glenoid cavity? 4

Answer 8

supraspinatus
infraspinatus
teres minor
subscapularis

Question 9

which muscles laterally rotate the shoulder? 3

Answer 9

infraspinatus
teres minor
deltoid (posterior fibers)

Question 10

which muscles flex the hip? 4

Answer 10

rectus femoris
TFL
anterior fibers of glute med
iliopsoas (with origin fixed)

Question 11

which muscles extend the hip? 5

Answer 11

biceps femoris (long head)
semimembranosus
semitendinosus
glute max (all fibers)
glute med (posterior fibers)

Question 12

which muscles abduct the hip? 3

Answer 12

TFL
glute max (all fibers)
glute med (all fibers)

Question 13

which muscles adduct the hip? 2

Answer 13

glute max (lower fibers)
adductor longus

Question 14

which muscles medially rotate the hip? 3

Answer 14

TFL
glute med (anterior fibers)
adductor longus

Question 15

which muscles laterally rotate the hip? 2

Answer 15

glute max (all fibers)
glute med (posterior fibers)

Question 16

which muscles flex the knee? 4

Answer 16

gastrocnemius
semimembranosus
semitendinosus
biceps femoris

Question 17

which muscles extend the knee? 2

Answer 17

rectus femoris
vastus group (lateralis, medialis, intermedius)

Question 18

which muscles medially rotate the flexed knee? 2

Answer 18

semimembranosus
semitendinosus

Question 19

which muscles laterally rotate the flexed knee? 1

Answer 19

biceps femoris

Question 21

which muscles dorsiflex the ankle? 2

Answer 21

EDL
tibialis anterior

Question 22

which muscles invert the foot? 1

Answer 22

tibialis anterior

Question 23

which muscles evert the foot? 2

Answer 23

EDL
fibularis longus

Question 24

which muscles extend 2nd to 5th toes? 1

Answer 24

EDL

Question 25

which muscles flex the elbow? 2

Answer 25

biceps brachii
brachioradialis

Question 26

which muscles extend the elbow? 1

Answer 26

triceps brachii (all heads)

Question 27

which muscles pronate the forearm? 1

Answer 27

brachioradialis (assists when movement is resisted)

Question 28

which muscles supinate the forearm? 2

Answer 28

biceps brachii brachioradialis (assists when movement is resisted)

Question 29

which muscles tilt the pelvis posteriorly? 4

Answer 29

semimembranosus (bilaterally) semitendinosus (bilaterally) biceps femoris (bilaterally) rectus abdominus

Question 30

which muscles tilt the pelvis anteriorly? 2

Answer 30

quadtratus lumborum iliospoas (with insertion fixed)

Question 31

which muscles flex the vertebral column? 4

Answer 31

rectus abdominus external obliques internal obliques illiospoas (with insertion fixed, flexes truck toward the thigh - is this the same? I dont know)

Question 32

which muscles extend the vertebral column? 1

Answer 32

erector spinae group

Question 33

which muscles laterally flex the vertebral column? 3

Answer 33

quadratus lumborum (same side) external obliques (same side) internal obliques (same side)

Question 34

which muscles rotate the vertebral column to same side? 1

Answer 34

internal obliques

Question 35

which muscles rotate the vertebral column to opposite side? 1

Answer 35

external obliques

Question 36

which muscles flex the neck? 2

Answer 36

SCM scalenes (anterior only)

Question 37

which muscles extend the neck? 3

Answer 37

levator scapulae splenius capitus trapezius (upper fibers)

Question 38

which muscles laterally flex the neck to the same side? 5

Answer 38

SCM scalenes (all 3) levator scapulae splenius capitus trapezius (upper fibers)

Question 39

which muscles rotate the neck to same side? 2

Answer 39

levator scapulae splenius capitus

Question 40

which muscles fix the last rib during forced inhalation and exhalation? 1

Answer 40

quadratus lumborum

Question 41

which muscles draw ribs inferiorly/superiorly? 2

Answer 41

internal intercostals = inferiorly external intercostals = superiorly

Question 42

which muscles compress abdominal contents? 2

Answer 42

external obliques internal obliques

Question 43

which muscle draws down the central tendon and increases the volume of the thoracic cavity? 1

Answer 43

diaphragm

Question 44

which muscles elevate the ribs during inhalation? 1

Answer 44

scalenes (all 3)

Question 45

which muscles elevate the scapula? 3

Answer 45

levator scapulae trapezius (upper fibers) rhomboids

Question 46

which muscles depress the scapula? 1

Answer 46

trapezius (lower fibers)

Question 47

which muscles downwardly rotate the scapula? 2

Answer 47

levator scapulae rhomboids

Question 48

which muscles upwardly rotate the scapula? 1

Answer 48

trapezius (upper & lower fibers)

Question 49

which muscles stabilize the scapula? 1

Answer 49

trapezius (middle fibers)

Question 50

which muscles laterally flex the neck to the same side? 5

Answer 50

SCM scalenes (all 3) levator scapulae splenius capitus trapezius (upper fibers)

Question 51

which muscles adduct the scapula? 2

Answer 51

trapezius (middle fibers) rhomboids

Question 52

which muscles laterally tilt/elevate the pelvis? 1

Answer 52

quadratus lumborum

Question 53

which muscles rotate the neck to opposite side? 3

Answer 53

SCM scalenes (all 3) trapezius (upper fibers)

Question 54

which muscles plantarflex the ankle? 2

Answer 54

gastrocnemius soleus