Skull Anatomy

Question 1

How many separate bones is the skull made up of?

Answer 1

22

Question 2

What are the 2 groups of bones that the skull is divided into?

Answer 2

Cranial bones and facial bones

Question 3

How many cranial bones are there?

Answer 3

8

Question 4

How many facial bones are there?

Answer 4

14

Question 5

The cranium is divided into what 2 groups of bones

Answer 5

Skull cap/calvarium and cranial floor

Question 6

What are the bones of the cranium?

Answer 6

Frontal, ethmoid, sphenoid, occipital, 2 parietal, and 2 temporal

Question 7

Sutures

Answer 7

Fibrous joints that connect the bones of the skull

Question 8

4 sutures of the skull

Answer 8

Coronal, sagittal, lambdoidal, and squamosal

Question 9

Coronal suture

Answer 9

Between parietal and frontal bones

Question 10

Sagittal suture

Answer 10

Between 2 parietal bones

Question 11

Squamosal suture

Answer 11

Between parietal and temporal bones

Question 12

Lambdoidal suture

Answer 12

Between occipital and parietal bones

Question 13

Bregma

Answer 13

Anterior end of the sagittal suture; junction of coronal and sagittal suture

Question 14

Lambda

Answer 14

Posterior end of sagittal suture; junction of sagittal and lambdoidal suture

Question 15

Fontanels

Answer 15

Area of incomplete ossification in infant skulls (soft spots)

Question 16

What age do the fontanels close by?

Answer 16

18 months

Question 17

What do the fontanels become?

Answer 17

The bregma and lambda

Question 18

What age is the adult cranial size achieved by?

Answer 18

12 years

Question 19

Skull cap/calverium bones

Answer 19

Frontal, occipital, and 2 parietal bones

Question 20

Cranial floor bones

Answer 20

2 temporal, sphenoid, and ethmoid bones

Question 21

Glabella

Answer 21

Between eyebrows

Question 22

Interpupillary line

Answer 22

Imaginary horizontal line between the center of the pupil of the eye

Question 23

Inner canthus

Answer 23

Inner corner of the eye

Question 24

Outer canthus

Answer 24

Outer corner of the eye

Question 25

Nasion

Answer 25

Where the nasal bones come together

Question 26

Acanthion

Answer 26

Where the maxilla comes together

Question 27

Mental point

Answer 27

Basically the tip of the chin

Question 28

Angle of mandible

Answer 28

Gonion

Question 29

Orbitomeatal line (OML)

Answer 29

From outer canthus to EAM

Question 30

Infraorbitomeatal line (IOML)

Answer 30

From infraorbital margin to EAM

Question 31

Glabellomeatal line (GML)

Answer 31

From glabella to EAM

Question 32

Interpupillary line

Answer 32

Perpendicular line between pupils of eyes

Question 33

Acanthomeatal line (AML)

Answer 33

From acanthion to EAM

Question 34

Mentomeatal line (MML)

Answer 34

From mental point to EAM

Question 35

Frontal bone

Answer 35

Forms forehead and superior orbit

Question 36

Supraorbital margin

Answer 36

Superior rim of each orbit

Question 37

Supraorbital notch

Answer 37

Foramen within the supraorbital margin allowing passage of nerve and artery

Question 38

Superciliary arch

Answer 38

Superior rim of orbit

Question 39

Supraorbital groove

Answer 39

Slight depression above each eyebrow

Question 40

Frontal tuberosity (eminence)

Answer 40

Forehead

Question 41

Orbital plate

Answer 41

Superior part of orbit

Question 42

What’s above the orbital plate?

Answer 42

Cranial floor

Question 43

What’s below the orbital plate?

Answer 43

Facial bones

Question 44

Ethmoidal notch

Answer 44

Separates orbital plates

Question 45

Where is the widest portion of the skull?

Answer 45

The width between the two parietal tubercles

Question 46

What is another name for the