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Flashcards in OPT1210 Exam 2 Deck (222)
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1

How many bones are in the human skull?

22

2

How is the infant skull different from the adult skull?

Infant skull has 4 fontanels (2 fontanels: anterior, posterior and 2 sutures: sphenoid, mastoid)
and fibrous membrane that holds bones together and
Allows movement of bones during birth and growth of brain

3

The bones of the skull are joined by what?

Sutures

4

What is the skullcap called?

Calvarium

5

What bones support teeth and form nasal cavity and orbit?

Facial bones

6

What does suture mean?

To join together

7

What are the 4 major sutures in the skull?

Coronal, Sagittal, Lamboidal, Squamous

8

What are the major skull cavities?

There are 4: Cranial, Orbital, Nasal, Buccal

9

What are the parts of the cranial fossa?

Anterior (Frontal lobe)
Middle (Temporal lobe)
Posterior (Cerebellum and Occipital lobes)

10

What are the Cranial bones?

There are 14:
Frontal
Parietal
Temporal
Occipital (primary visual cortex)
Sphenoid
Ethmoidal
Maxillary (single bone...not paired)
Palatine
Zygomatic
Lacrimal
Nasal
Conchae
Vomer
Mandible

11

Which of the Cranial bones protect the eye?

There are 7:
Frontal
Parietal
Occipital
Temporal
Squamous Zygomatic Arch
Mandibular Fossa TMJ
External Auditory Meatus
Styloid Process
Mastoid

12

Which bone houses the largest opening in the skull and what is it?

The occipital bone
It's the Foramen Magnum (spinal cord)

13

Which cranial bone conducts the 7th cranial facial nerve?

Styloid Process

14

Which bone is bat shaped?

Sphenoid bone

15

What is the thinnest bone in the body?

Ethmoid bone (aka paper bone)

16

What are the 6 paired facial bones?

Lacrimal
Nasal
Zygomatic
Maxilla
Palatine
Inferior Nasal Concha

17

What are the palatine bones?

Make up the posterior 1/3 of hard palate
Lateral nasal wall
Orbital floor

18

What are the zygomatic bones?

Include the zygomatic arch
Zygomatic fracture is the most common fracture of the skull

19

What is the smallest bone of the orbit?

Lacrimal bones

20

What are the bones of the orbit?

There are 7:
Frontal (roof of orbit)
Sphenoid
Zygomatic
Ethmoid
Palatine
Lacrimal
Maxillary (floor of orbit)

21

What are the 4 sinuses?

Frontal
Sphenoidal
Ethmoidal
Maxillary

22

What do the 4 paranasal sinuses do?

Lighten weight of skull
Provide airation
Provide warmth
Provide moisture
Trap pathogens

23

What are the 3 unpaired facial bones?

Vomer (vertical bone)
Mandible (freely movable)
Hyoid (free floating...muscles that let you swallow)

24

How many pairs of mimetic muscles of facial expression are there?

36 pairs

25

What are the muscles of facial expression?

Levator Anguli Oris
Levator Labii Superioris
Levator Labii Superioris Alaeque Nasi
Mentalis
Nasalis
Orbicularis Oculi
Orbicularis Oris
Platysma
Procerus
Risorius
Zygomaticus Major

26

What nerve controls muscles of facial expression?

7th cranial nerve - facial

27

What is 7th nerve paralysis?

Bell's Palsy

28

How many wings of the sphenoid bone are there? What are they?

There are 2:
Greater wing
Lesser wing

29

What is the brain's most important receptor?

Eye

30

What are the parts of the CNS?

Brain and spinal cord