Neck/Back/Pelvic Muscles Actions

Question 1

Sternocleidomastoid

Answer 1

B: Flex neck
U: Lateral flexion + turn to opposite side

Question 2

Stylohyoid

Answer 2

Elevates and retracts hyoid during swallowing

Question 3

Digastric

Answer 3

Depresses mandible or elevates hyoid bone during swallowing

Question 4

Mylohyoid

Answer 4

Elevates hyoid

Question 5

Geniohyoid

Answer 5

Pulls hyoid anterosuperiorly, widens pharynx

Question 6

Omohyoid

Answer 6

Depresses and fixes hyoid bone

Question 7

Sternohyoid

Answer 7

Depresses hyoid

Question 8

Thyrohyoid

Answer 8

Depresses hyoid and elevates larynx

Question 9

Sternothyroid

Answer 9

Depresses hyoid and larynx

Question 10

Longus Colli

Answer 10

Flexes neck

Question 11

Longus Capitis

Answer 11

Flexes head

Question 12

Rectus Capitis Anterior

Answer 12

Flexes head

Question 13

Anterior Scalene

Answer 13

Flexes head

Question 14

Rectus Capitis Lateralis

Answer 14

Flexes and stabilizes head

Question 15

Middle Scalene

Answer 15

Flexes neck laterally, elevates first rib during forced inspiration

Question 16

Posterior Scalene

Answer 16

Flexes neck laterally, elevates second rib during forced inspiration

Question 17

Splenius Capitis

Answer 17

U: Laterally flexes and rotates head and neck to same side
B: Extends head and neck

Question 18

Levator Scapulae

Answer 18

Elevates scapula

Question 19

Platysma

Answer 19

Depresses lower jaw and lip and abgle of mouth, wrinkles skin of neck

Question 20

Serratus Posterior Superior

Answer 20

Elevation of ribs

Question 21

Serratus Posterior Inferior

Answer 21

Depression of ribs

Question 22

Splenius Cervicis

Answer 22

Extends spine and rotates to the same side

Question 23

Splenius Capitis

Answer 23

Extends and rotates to the same side

Question 24

Iliocostalis

Answer 24

Extension and Ipsilateral rotation,

Fixed: Elevation of pelvis and contralateral rotation

Question 25

Semispinalis

Answer 25

Extension, contralateral rotation

Question 26

Multifundus

Answer 26

Extension, Contralateral rotation

Fixed: Elevation of Pelvis, Ipsilateral rotation

Question 27

Rectus Abdominis

Answer 27

Trunk flexion, compression

Question 28

External Oblique

Answer 28

Rotates trunk to the opposite side

Question 29

Internal Oblique

Answer 29

Rotates trunk to the same side

Question 30

Transverse Abdominis

Answer 30

Compression

Question 31

Quadratus Lumborum

Answer 31

Trunk bending, same side flexion

Question 32

Iliacus

Answer 32

Flex the torso and thigh with respect to eachother

Question 33

Psoas major and minor

Answer 33

Flexes torso and thigh with respect to eachother

Question 34

Gluteus Maximus

Answer 34

Major extensor, assists in lateral rotation

Question 35

Gluteus Medius

Answer 35

Major abductor, Anterior fiber rotate medially, posterior fibers rotate laterally

Question 36

Gluteus Minimus

Answer 36

Abducts and medially rotates hip

Question 37

Piriformis

Answer 37

Lateral Rotator of the hip joint, helps abduct in flexion

Question 38

Superior Gemellus

Answer 38

Rotates thigh laterally, helps abduct and flex

Question 39

Inferior Gemellus

Answer 39

Rotates thigh laterally, helps abduct and flex

Question 40

Obturator Internus

Answer 40

Rotates thigh laterally, helps abduct when in flexion

Question 41

Quadratus Femoris

Answer 41

Lateral hip rotation, helps adduct

Question 42

Obturator Externus

Answer 42

Lateral thigh rotation, helps with adduction