Muscle Actions

Question 1

Anterior tibialis

Answer 1

Dorsiflexion
Inversion
Isometrically stabilizes arch

Question 2

Posterior tibialis

Answer 2

Plantarflexion
Inversion
Isometrically stabilizes arch

Question 3

Soleus

Answer 3

Plantarflexion

Question 4

Gastrocnemius

Answer 4

Plantarflexion

Question 5

Peroneus longus

Answer 5

Plantarflexion

Eversion

Question 6

Biceps femoris - Long head

Answer 6

Knee flexion
Hip extension
Tibial external rotation

Question 7

Biceps femoris - Short head

Answer 7

Knee flexion

Tibial external rotation

Question 8

Semimembranosus

Answer 8

Knee flexion
Hip extension
Tibial internal rotation

Question 9

Semitendinosus

Answer 9

Knee flexion
Hip extension
Tibial internal rotation

Question 10

Vastus lateralis

Answer 10

Knee extension
Decelerates hip adduction
Decelerates hip internal rotation

Question 11

Vastus medialis

Answer 11

Knee extension
Decelerates hip adduction
Decelerates hip internal rotation

Question 12

Vastus intermedius

Answer 12

Knee extension
Decelerates hip adduction
Decelerates hip internal rotation

Question 13

Rectus femoris

Answer 13

Knee extension
Hip flexion
Decelerates hip adduction
Decelerates hip internal rotation

Question 14

Adductor longus

Answer 14

Hip adduction
Hip flexion
Hip internal rotation

Question 15

Adductor magnus - Anterior fibers

Answer 15

Hip adduction
Hip flexion
Hip internal rotation

Question 16

Adductor magnus - Posterior fibers

Answer 16

Hip adduction
Hip extension
Hip external rotation

Question 17

Adductor brevis

Answer 17

Hip adduction
Hip flexion
Hip internal rotation

Question 18

Gracilis

Answer 18

Hip adduction
Hip flexion
Hip internal rotation
Tibial internal rotation

Question 19

Pectineus

Answer 19

Hip adduction
Hip flexion
Hip internal rotation

Question 20

Gluteus medius - Anterior fibers

Answer 20

Hip abduction

Hip internal rotation

Question 21

Gluteus medius - Posterior fibers

Answer 21

Hip abduction

Hip external rotation

Question 22

Gluteus minimus

Answer 22

Hip abduction

Hip internal rotation

Question 23

Gluteus maximus

Answer 23

Hip extension
Hip external rotation
Decelerates internal tibial rotation

Question 24

Tensor fascia latte

Answer 24

Hip flexion
Hip abduction
Hip internal rotation

Question 25

Psoas

Answer 25

Hip flexion Hip external rotation Lumbar extension Lumbar rotation

Question 26

Iliacus

Answer 26

Hip flexion | Hip external rotation

Question 27

Sartorius

Answer 27

Hip flexion Hip external rotation Hip abduction

Question 28

Piriformis

Answer 28

Hip external rotation Hip abduction Hip flexion

Question 29

Rectus abdominus

Answer 29

Spinal flexion Spinal lateral flexion Spinal rotation

Question 30

External oblique

Answer 30

Spinal flexion Spinal lateral flexion Spinal contralateral rotation

Question 31

Internal oblique

Answer 31

Spinal flexion Spinal lateral flexion Spinal ipsilateral rotation

Question 32

Transverse abdominus

Answer 32

Increases intra-abdominal pressure

Question 33

Diaphragm

Answer 33

Pulls central tendon inferiorly, increasing volume in thoracic cavity

Question 34

Erector spinae

Answer 34

Spinal extension Spinal rotation Spinal lateral flexion

Question 35

Quadratus lumborum

Answer 35

Spinal lateral flexion

Question 36

Multifidus

Answer 36

Spinal extension | Spinal contralateral rotation

Question 37

Latissimus dorsi

Answer 37

Shoulder extension Shoulder adduction Shoulder internal rotation

Question 38

Serratus anterior

Answer 38

Scapular protraction

Question 39

Rhomboid major

Answer 39

Scapular retraction | Scapular downward rotation

Question 40

Rhomboid minor

Answer 40

Scapular retraction | Scapular downward rotation

Question 41

Lower trapezius

Answer 41

Scapular depression

Question 42

Middle trapezius

Answer 42

Scapular retraction

Question 43

Upper trapezius

Answer 43

Cervical extension Cervical lateral flexion Cervical rotation Scapular elevation

Question 44

Pectoralis major

Answer 44

Shoulder flexion Shoulder horizontal adduction Shoulder internal rotation

Question 45

Pectoralis minor

Answer 45

Scapular protraction

Question 46

Anterior deltoid

Answer 46

Shoulder flexion | Shoulder internal rotation

Question 47

Medial deltoid

Answer 47

Shoulder abduction

Question 48

Posterior deltoid

Answer 48

Shoulder extension | Shoulder external rotation

Question 49

Teres major

Answer 49

Shoulder internal rotation Shoulder adduction Shoulder extension

Question 50

Teres minor

Answer 50

Shoulder external rotation

Question 51

Infraspinatus

Answer 51

Shoulder external rotation

Question 52

Subscapularis

Answer 52

Shoulder internal rotation

Question 53

Supraspinatus

Answer 53

Arm abduction

Question 54

Biceps brachii

Answer 54

Elbow flexion Radioulnar supination Shoulder flexion

Question 55

Triceps brachii

Answer 55

Elbow extension | Shoulder extension

Question 56

Brachioradialis

Answer 56

Elbow flexion

Question 57

Brachialis

Answer 57

Elbow flexion

Question 58

Levator scapulae

Answer 58

``` Cervical extension Cervical lateral flexion Cervical ipsilateral rotation Scapular elevation Scapular downward rotation Decelerates cervical lateral flexion ```

Question 59

Sternocleidomastoid

Answer 59

Cervical flexion Cervical rotation Cervical lateral flexion Decelerates cervical lateral flexion

Question 60

Scalenes

Answer 60

``` Cervical flexion Cervical rotation Cervical lateral flexion Assists rib elevation during inhalation Decelerates cervical lateral flexion ```

Question 61

Longus coli

Answer 61

Cervical flexion Cervical lateral flexion Cervical ipsilateral rotation Decelerates cervical lateral flexion

Question 62

Longus capitis

Answer 62

Cervical flexion | Cervical lateral flexion