Neck and Manible Muscle OIA

Question 1

sternocleidomastoid origin

Answer 1

sternal head:
anterior surface
of manubrium

clavicular head:
upper surface of
medial 1/3 of
clavicle

Question 2

sternocleidomastoid insertion

Answer 2

lateral surface of
mastoid process,
lateral half of
superior nuchal
line of occipital
bone

Question 3

sternocleidomastoid action

Answer 3

bilateral: flex head,
raise thorax

unilateral: turns face
toward opposite side

Question 4

scalene anterior origin

Answer 4

anterior tubercles
of transvers
processes C3-C6

Question 5

scalene anterior insertion

Answer 5

scalene tubercle

on 1st rib

Question 6

scalene anterior action

Answer 6

elevates 1st rib,

bends neck

Question 7

scalene medius origin

Answer 7

posterior
tubercles of
transverse
processes of C2-
C7

Question 8

scalene medius insertion

Answer 8

upper surface of
1st rib behind
subclavian
groove

Question 9

scalene medius action

Answer 9

elevates 1st rib,

bends neck

Question 10

scalene posterior origin

Answer 10

posterior
tubercles of
transverse
processes of C4-
C6

Question 11

scalene posterior insertion

Answer 11

outer surface of
2nd rib behind
attachment of
serratus anterior

Question 12

scalene posterior action

Answer 12

elevates 2nd rib,

bends neck

Question 13

longus colli origin

Answer 13

C3-C7 Anterior
tubercles and
vertebral bodies,
T1-T3 vertebral
bodies

Question 14

longus colli insertion

Answer 14

tubercle of
anterior arch of
atlas, C2-C6
anterior
tubercles and
vertebral bodies

Question 15

longus colli action

Answer 15

Bilateral: flex and
assist in rotating
cervical vertebrae
and head
unilaterally: flexes
vertebral column
laterally

Question 16

Longus capitis origin

Answer 16

anterior tubercles
of transverse
process of C3-C6

Question 17

Longus capitis insertion

Answer 17

inferior surface
of basilar part of
occipital bone

Question 18

Longus capitis action

Answer 18

flexes and assists in
rotating cervical
vertebrae and head

Question 19

digastric origin

Answer 19

Anterior Belly:
Digastric Fossa of
Mandible

Posterior Belly:
Mastoid Notch of
temporal bone

Question 20

digastric insertion

Answer 20

Intermediate
tendon attached
to the body of
hyoid

Question 21

digastric action

Answer 21

Rasies hyoid bone
and base of tongue,
steadies hyoid bone,
opens mouth by
lowering mandible.

Question 22

mylohyoid origin

Answer 22

mylohyoid line of

mandible

Question 23

mylohyoid insertion

Answer 23

median raphe
and body of
hyoid bone

Question 24

mylohyoid action

Answer 24

elevates hyoid bone,
base of tongue, floor
of mouth, depresses
mandible

Question 25

Geniohyoid origin

Answer 25

inferior genial tubercle on back of symphysis of mandible

Question 26

Geniohyoid insertion

Answer 26

anterior surface | of body of hyoid

Question 27

Geniohyoid action

Answer 27

elevates hyoid and | depresses mandible

Question 28

temporalis origin

Answer 28

floor of temporal fossa, deep temporal fascia

Question 29

temporalis insertion

Answer 29

coronoid process and ramus of mandible

Question 30

temporalis action

Answer 30

elevates mandible; posterior fibers retrude mandible

Question 31

Masseter origin

Answer 31

zygomatic arch

Question 32

Masseter insertion

Answer 32

ramus of mandible, coronoid process

Question 33

Masseter action

Answer 33

elevates and protrudes mandible, deep fibers retrude it

Question 34

Lateral pterygoid origin

Answer 34

superior head: infratemporal surface of greater wing of sphenoid Inferior head: lateral pterygoid plate

Question 35

Lateral pterygoid insertion

Answer 35

``` pterygoid fovea capsule of temporalmadibul ar joint, articular disc ```

Question 36

Lateral pterygoid action

Answer 36

Bilateral: Protrude mandible unilateral: Produces side to side grinding

Question 37

Medial pterygoid origin

Answer 37

medial surface of lateral plate of pterygoid, pyramidal process of palatine bone, maxillary tuberosity

Question 38

Medial pterygoid insertion

Answer 38

``` medial surface of ramus and angle of mandible inferior mandible foramen ```

Question 39

Medial pterygoid action

Answer 39

``` bilateral: protrude and elevate mandible Unilateral: produces side to side movements ```

Question 40

rectus capitis anterior origin

Answer 40

lateral mass of | atlas

Question 41

rectus capitis anterior insertion

Answer 41

base of occipital bone in front of foramen magnum

Question 42

rectus capitis anterior action

Answer 42

flexes head

Question 43

rectus capitis lateralis origin

Answer 43

upper surface of transverse process of atlas

Question 44

rectus capitis lateralis insertion

Answer 44

inferior surface of jugular process of occipitalbone

Question 45

rectus capitis lateralis action

Answer 45

flexes head laterally | to same side