Skull Osteology & Muscles of Facial Expression Flashcards Preview

VCU Anatomy Test 2 > Skull Osteology & Muscles of Facial Expression > Flashcards

Flashcards in Skull Osteology & Muscles of Facial Expression Deck (29):
1

Which is not a function of the skull:
1. support and contain the brain
2. houses all the senses
3. protection of the brain to some degree
4. isolates the cerebral circulation

2. houses all the senses
*the skull houses only the special senses sight, hearing, and smelling*

2

Which is not a function of the skull:
1. barrier against stresses due to the large masticatory and axial musculature
2. bony orbit maintains to position of the eye during rotations which is necessary for binocular vision
3. bony fixation of semicircular canals necessary for their function
4. protesting of spinal cord

4. protection of spinal cord

3

Which bone of the skull contains:
- contains zygomatic process (small process for articulation with the zygomatic bone)
-contains supraorbital notch/foramen
-region of the forehead back to the coronal suture

Frontal Bone

4

Which bone of the skull contains:
-2 bones joined at sagittal suture
-junction of coronal & sagittal sutures is called the bregma
-the suture between the parietal bones & occipital bone is called the lamboid suture
-junction of sagittal suture and lamboid suture is called the lambda

Parietal Bone

5

Which bone of the skull contains:
-external occipital protuberance (inion)
-superior nuchal line
-inferior nuchal line

Occipital Bone

6

Which bone of the skull contains:
-squamous part
-petrous part
-zygomatic process
-mandibular fossa
-mastoid process
-external-internal acoustic meatus
-styloid process
-stylomastoid foramen

Temporal Bone

7

Which bone of the skull contains:
-a body (internal base view) with optic groove, optic foramen, sella turcica
-a greater wing (internal base view) with a foramen rotundum, foramen ovale, and foramen spinosum
-lesser wings
-superior orbital fissure
-pterygoid process (medial and lateral pterygoid plates) (external base view)

Sphenoid Bone

8

Which bone of the skull contains:
-cribiform plate
-crista galli

Ethmoid Bone

9

Which FACIAL bone contains:
-body: infr-orbital foramen
-zygomatic process
-frontal process
-alveolar process
-palatine process (external base view)

Maxilla

10

Which FACIAL bone contains:
-frontal process
-maxillary process

Zygomatic Bones

11

Which FACIAL bone contains:
-mental protuberance
-mental forament
-ramus
-angle of mandible
-coronoid process
-condylar process with head
-mandibular notch

Mandible Bone

12

Which is NOT a facial bone?
1. xyphoid process
2. nasal bone
3. lacrimal bone
4. palatine bone
5. vomer

1. xyphoid process

13

Which is NOT a Cranial Fossa?
1. posterior cranial fossa
2. anterior cranial fossa
3. middle cranial fossa
4. brevis cranial fossa

4. brevis cranial fossa

14

Muscles of facial expression:
innervation

facial nerve (CN VII)

15

Muscles of facial expression:
name them

Frontalis
Levator labii superioris
Orbicularis oris
Orbicularis oculi
Depressor anguli oris

Buccinator
Zygomaticus major

16

Muscles of facial expression:
Which one is sphincter of the eye; fibers encircle the eye and eyelids; closes the eye and forces out tears

orbicularis oculi

17

Muscles of facial expression:
Which one is a thin, flat muscle that aids in mastication by pressing the cheeks against the teeth during chewing

Buccinator

18

Muscles of facial expression:
Which one is the sphincter of the mouth; fibers encircle the mouth; closes the mouth

Orbicularis oris

19

Muscles of facial expression:
Which one runs from infraorbital margin to upper lip; raises the upper lip

Levator Labii Superioris

20

Muscles of facial expression:
Which one extends from zygomatic bone to the angle of mouth; draws angle up as in laughing.

Zygomaticus major

21

Muscles of facial expression:
Which one depresses the corner of the mouth?

Depressor Anguli Oris

22

Muscles of facial expression:
Which one is part of the scalp muscle called the occipitofrontalis; elevates the eyebrows

Frontalis

23

What nerve innervates muscles of mastication?

trigeminal nerve (CN V - mandibular portion V3)

24

Facial nerve (CN VII) emerges from the skull thru which foramen?

stylomastoid foramen

25

Facial nerve (CN VII) has 5 terminal branches. Name them.

1. temporal
2. zygomatic
3. buccal
4. mandibular
5. cervical

26

Innervation of the face is primarily thru 3 branches of which nerve?

Trigeminal n.

27

3 branches of Trigeminal n:

1. ophthalmic n.
2. maxillary n.
3. mandibular n.

28

Which branch of the trigeminal n. has motor AND sensory?

mandibular n.

29

Which branch of the trigeminal n. supplies motor fibers to the muscles of mastication?

mandibular n.