The Skull And Vertebrae

Question 1

The calvarium contains?

Answer 1

• frontal bone
• parietal bones (2)
• temporal bones
• occipital bone
• sphenoid
• ethmoid

Question 2

Parietal

Answer 2

There are two of these. The walls of the skull

Question 3

Suture

Answer 3

Joints between calvarium bones

Question 4

Coronal suture

Answer 4

Connects the frontal bone and the parietals.

Question 5

(Mid) Sagittal suture

Answer 5

Connects parietals

Question 6

Lambdoidal suture

Answer 6

Connects parietals and occipital

Question 7

Temporal bone. What are the 4 parts and explain them.

Answer 7

Squamous- thin and flat

Mastoid- (breast) sinus connects to middle ear. Connects with nasal pharynx.

Zygomatic process- posterior part of cheek

Petrous- houses inner ear

Question 8

Occipital bone

Answer 8

Posterior part of floor. Houses foremen magnum. Articulates with 1st cervical vertebrae (atlas)

Question 9

Sphenoid

Answer 9

Keystone of the floor. Sphenoid sinus. Forms lateral wall of the orbit. Called Turkish saddle because of the 4 Clinoid processes. Pituitary gland sits between the saddle.

Question 10

Ethmoid

Answer 10

Cribriform plate ( square bone) where olfactory nerves pass through to the nose.

Question 11

The skull is broken down into 2 sections. What are they?

Answer 11

Calvarium and facial bones

Question 12

Maxilla in detail

Answer 12

Upper jaw (keystone of face)

• all facial bones touch it except mandible
• has a zygomatic process
• entering roof of mouth is formed by maxilla

Question 13

Nasal bones. How many? Forms what?

Answer 13

(2) and forms bridge of nose

Question 14

Lacrimal bones

What? How many?

Answer 14

Located on the medial portion of the orbit there are 2 of them.

Question 15

Zygomatic bones

What? How many?

Answer 15

(2) middle aspect of cheek bone

Question 16

Cheek bones are mad up of?

Answer 16

Zygomatic process of the maxilla, zygomatic bones, and the zygomatic process of the temporal

Question 17

Palatine bones

Answer 17

Forms posterior roof of mouth

Question 18

Inferior conch

How many? What?

Answer 18

(2) inferior lateral nasal cavity

Question 19

Vomer

Answer 19

Medial nasal cavity (septum)

Question 20

Mandible

Answer 20

Lower jaw, the only moveable joint in skull

Question 21

Coronoid process

Answer 21

Forms temporal mandible joint (TM)

Question 22

Hyoid

Answer 22

U SHAPED, anterior I f neck, inferior to mandible, superior to larynx (Adams apple)

• no bones attachments only muscle

Question 23

Vertebral column

Answer 23

Moveable

• 7 cervical
• 12 thoracic
• 5 lumbar

Immovable

• 5 sacrum
• 5 coccyx

Question 24

Accentuated thoracic curve

Answer 24

Kyphosis

Hunch back

Question 25

Accentuated lumber curve

Answer 25

Lordosis

Sway back

Question 26

Accentuated lateral curve (side ways)

Answer 26

Scoliosis

Question 27

Cervical 1 (C1)

Answer 27

Aka atlas, articular with occipital bone and C2. It has no body.

Question 28

Cervical 2

Answer 28

Body of C1 fuses to body of C2. This is called the odontoid process.

Question 29

Thoracic V.

Answer 29

Has facets for ribs; longer spines

Question 30

Lumber V

Answer 30

Largest bodies; most weight baring

Question 31

Fused sacrum and coccyx V

Answer 31

Immovable section

Question 32

Intervertebral discs.

What’s it made of

Answer 32

In between bodies of vertebrae
- rings of fibril cartilage aka annuals fibrosis

Nucleus pulposus - jelly like center of disc

Question 33

Thoracic cavity

Answer 33

Sternum
Costal cartilage
Ribs
Bodies of thoracic vertebrae