The skull

Question 1

What bones make up the norma occipitalis?

Answer 1

parietal bones
occipital bone (squamous part)
temporal bone (mastoid part)

Question 2

What is the inion?

Answer 2

The inion is a site found halfway between the external occipital protuberance and foramen magnum

Question 3

What suture is found between the parietal bones?

Answer 3

sagittal suture

Question 4

What suture is found between the occipital bone and temporal bones?

Answer 4

occipitomastoid suture

Question 5

What is so special about the superior nuchal line?

Answer 5

• It is the site of insertion of the SCM muscle

- It is the origin of the trapezius muscle

Question 6

What is the significance of the mastoid emissary foramen?

Answer 6

The mastoid emissary foramen allows the passage of an emissary vein.

Question 7

What is the external occipital protuberance?

Answer 7

a raised surface on the occipital bone of the skull; it is the site of insertion of the nuchal ligament

Question 8

What is the external occipital crest?

Answer 8

Line connecting the external occipital protuberance to the foramen magnum

Question 9

What are the bones of the skull?

Answer 9

2 x parietal
1 x frontal
1 x occipital
2 x temporal
1 x sphenoid
1 x ethmoid
1 x vomer
2 x lacrimal
2 x palatine
2 x inferior conchae
2 x maxillary
1 x mandible
2 x zygomatic
2 x nasal

Question 10

What is the mastoid?

Answer 10

The mastoid is a process which arises from the temporal bone

Question 11

What are different orientations of the skull?

Answer 11

norma frontalis
norma occipitalis
norma basalis
normal verticalis
normal lateralis

Question 12

What are the kinds of joins in the skull?

Answer 12

Fibrous (between fixed bones) and synovial (between mandible and other bones)

Question 13

What sutures are found in the norma verticalis?

Answer 13

1) coronal suture between parietal bones and frotnal bone (junction = bregma)
2) sagittal suture between parietal bones
3) lambdoid suture between parietal bones and occipital bone (junction = lambda)

Question 14

Where is the parietal emissary foramen found?

Answer 14

The parietal emissary foramen is found on either side of the sagittal suture: it carries an emissary vein which connects scalp veins with the superior sagittal sinus

Question 15

What is the fronta normalis? What bones form the norma frontalis?

Answer 15

The front aspect of the skull; formed from the following bones:

• 1 x frontal bone
• 2 x zygomatic bones
• 2 x maxillary bones
• 1 x mandible

Question 16

What sutures are found in the norma frontalis?

Answer 16

• metopic suture (between 2 x halves of frontal bone)
• frontonasal suture
• frontomaxillary suture
• zygomaticomaxillary suture
• intermaxillary suture

Question 17

What are the parts of the norma frontalis?

Answer 17

upper part –> frontal bone
middle part –> 2 x orbits + 1 x nasal cavity
lower part –> jaw (mandible and maxilla)

Question 18

What is the glabella?

Answer 18

An elevation between the superciliary arches