lab 3: head, neck, trunk, pectoral girdle

Question 1

obicularis oculi m. action

Answer 1

closes eye

Question 2

obicularis oris m. action

Answer 2

compresses and purses lips

Question 3

zygomaticus major m action

Answer 3

elevates corner of mouth and draws it laterally

Question 4

levator labii superioris m. action

Answer 4

elevates and everts upper lip

Question 5

depressor labii inferioris m. action

Answer 5

depresses and everts lower lip

Question 6

platysma muscle action

Answer 6

tenses skin of neck, depresses mandible

Question 7

masseter m action

Answer 7

elevates mandible, closes jaws; assists in protracting and retracting mandible

Question 8

temporalis m. action

Answer 8

elevates mandible and closes jaws, assists in retracting and moving mandible from side to side

Question 9

medial pterygoid m action

Answer 9

elevates the mandible and closes jaws, moves mandible side to side

Question 10

lateral pterygoid m action

Answer 10

opens jaws, protrudes mandible, moves mandible side to side

Question 11

intrinsic muscles lie…

Answer 11

lie completely within the tongue

move the tongue

Question 12

extrinsic muscles…

Answer 12

attach tongue to the mandible, hyoid, temporal bone and soft palate

move the tongue

Question 13

sternocleidomastoid m attachments (3) and actions

Answer 13

clavicle, sternum, mastoid process of the skull

acting bilaterally: flex the neck
acting unilaterally: bends the neck towards shoulder and turns face to opposite side

Question 14

subclavius: origin, insertion, action

Answer 14

origin: first rib
insertion: inferior border of middle third of clavicle
action: depresses and protracts pectoral girdle

Question 15

pectoralis minor m: origin, insertion, action

Answer 15

origin: ribs 3-5 (anterior surfaces and superior margin)
insertion: coracoid process of scapula
action: depresses and protracts scapulae, elevated ribs if scapulae are stationary, downward rotation of scapula

Question 16

serratus anterior muscle: origin, insertion, action

Answer 16

origin: anterior and superior margins of ribs 1-8/9/10
insertion: anterior surface of vertebral border of scapula
action: protracts shoulder, rotates scapula so glenoid fossa moves superiorly

Question 17

levator scapulae m: origin, insertion, action

Answer 17

origin: C1-C4 vertebrae at transverse processes
insertion: medial border of scapula
action: elevates scapulae, lateral flexion of neck to same side

Question 18

rhomboid major and minor m: origin, insertion, action

Answer 18

origin: spinous processes of C7-T6
insertion: medial border of scapula
action: adduction and retraction and downward rotation of scapula

Question 19

trapezius upper fibers: origin, insertion, action

Answer 19

origin: occipital bone
insertion clavicle
action: elevation/upper rotation of scapula

Question 20

trapezius middle fibers: origin, insertion, action

Answer 20

origin: ligamentum nuchae
insertion: acromion spine of scapula
action: retraction of scapula

Question 21

trapezius lower fibres: origin, insertion, action

Answer 21

origin: spinous processes or thoracic vertebrae
insertion: acromion spine of scapula
action: depression of scapula

Question 22

what sits in the foramen magnum

Answer 22

brain stem and spinal cord

Question 23

brow ridge is called the

Answer 23

supraorbital margin

Question 24

eyebrow ridge is called the

Answer 24

superciliary arches

Question 25

anatomical name for cheekbone

Answer 25

zygomatic arch

Question 26

what attaches to the pterygoid processes

Answer 26

anchors jaw muscles that move the lower jaw and soft palate

Question 27

crista galli function

Answer 27

attachment sire for fibrous membrane of the brain

- aids in securing brain within cranial cavity

Question 28

cribriform plate function

Answer 28

• helps make up the roof of the nasal cavity

- olfactory nerves pass through

Question 29

perpendicular plate forms what

Answer 29

forms nasal septum with vomer bone and hyaline cartilage

Question 30

superior and middle nasal conchae function

Answer 30

mucous secretions from the air cells flush surfaces of the nasal cavity

Question 31

what lies in the submandibular fossa

Answer 31

submandibular salivary gland

Question 32

hyoid bone function

Answer 32

supports larynx and serves as a base for muscles that move the tongue
- isn’t in direct contact with any other bone of the skeleton

Question 33

what passes through vertebral foramen

Answer 33

vertebral arteries and veins

Question 34

superior and inferior costal facets articulate with

Answer 34

superior and inferior articular facets

Question 35

transverse costal facet of vertebrae articulates with

Answer 35

tubercles of ribs

Question 36

coccyx fuses at what age

Answer 36

26

Question 37

what attaches to xiphoid process on sternum

Answer 37

muscular diaphragm and rectus abdominis muscle

Question 38

sternoclavicular joint and ligament

Answer 38

diarthrotic synovial monaxial planar joint

-anterior sternoclavicular ligament

Question 39

2 ligaments on shoulder model

Answer 39

acromioclavicular ligament (8)
coracoclavicular ligament (9)

Question 40

where do the muscles of the face insert

Answer 40

dermis of skin and superficial fascia to move the skin

Question 41

scalene muscles action

Answer 41

elevate ribs, flex neck

side of neck

Question 42

longissmus thoracis action

Answer 42

extends vertebral column, lateral flexion to same side

base of back by lumbar vertebrae

Question 43

splenius capitis action

Answer 43

rotates and laterally flexes neck to same side

on top of spine by occipital bone