Cranium and Branium

Question 1

What are the 8 bones of the cranium?

Answer 1

Parietal (2), frontal, ethmoid, sphenoid, occipital, and the temporal (2)

Question 2

What bones are in the anterior cranial fossa?

Answer 2

Frontal bone, ethmoid bone, and sphenoid bone

Question 3

What bones are in the middle cranial fossa?

Answer 3

Sphenoid and the temporal

Question 4

What bones are in the posterior cranial fossa?

Answer 4

Occipital and temporal bone

Question 5

What are the two portions of the Ethmoid bone?

Answer 5

Horizontal portion and vertical portion

Question 6

Where is the horizontal portion of the ethmoid bone?

Answer 6

Fits into ethmoid notch of frontal bone, contains foramina for passage of olfactory nerves

Question 7

Where is the vertical portion of the ethmoid bone?

Answer 7

Porjects from cribriform plate to form nasal septum

Question 8

Does a cephalohematoma cross sutures?

Answer 8

No

Question 9

What are the 3 types of scalp hematomas?

Answer 9

Caput Succedaneum, Subgaleal Hematoma, Cephalohematoma

Question 10

What are the 4 sutures of the cranium?

Answer 10

Squamous suture, coronal suture, sagittal suture, lambdoidal suture

Question 11

What are the 7 fontanels?

Answer 11

Anterior Fontanel, Posterior Fontanel, Anterolateral (2), Posterolateral (2)

Question 12

When does the anterior fontanel close?

Answer 12

Age 2

Question 13

When does the posterior fontanel close?

Answer 13

b/w 1-3 months

Question 14

When does the anterolateral fontanel close?

Answer 14

b/w 1-3 months

Question 15

When does the posterolateral fontanel close?

Answer 15

2 yrs

Question 16

What is Dura Mater?

Answer 16

The strongest outermost layer of the brain, double layer of membrane continuous w/periosteum of cranium

Question 17

What is arachnoid mater?

Answer 17

Middle layer, delicate, transparent

subdural space = a potential space between the dura and arachnoid mater.

Question 18

What is Pia Matter?

Answer 18

The inner layer, highly vascular, adheres to contours of brain.
Subarachnoid space = poential space b/w arachnoid and pia mater, contains most of the CSF

Question 19

What space contains most of the CSF?

Answer 19

The subarachnoid space

Question 20

What do the right and left lateral ventricles communicate with?

Answer 20

The 3rd ventricle via the foramen of Monro

Question 21

What does the 3rd ventricle communicate with?

Answer 21

The 4th ventricle via aqueduct of Sylvius

Question 22

How does CSF exit the ventricular system

Answer 22

Exits through the foramen of Magendie, which communicates with the subarachnoid space and through the foramen of Luschka. Then enters subarachnoid space and circulates around brain and spinal cord.

Question 23

What does the Choroid Plexus create?

Answer 23

CSF

Question 24

Where is CSF created?

Answer 24

Choroid Plexus

Question 25

What is the largest cistern?

Answer 25

Cisterna Magna

Question 26

The brain receives blood from what 2 main vessels?

Answer 26

Internal carotid arteries and vertebral arteries

Question 27

What do the internal carotid arteries supply?

Answer 27

Frontal, parietal, and temporal lobes of the brain and eye ball structures

Question 28

Where do the vertebral arteries go and what do they form?

Answer 28

Coarse along medulla oblongata and join anterior to pons and form basilar artery

Question 29

The Circle of Willis anastomosises between 4 major cerebral arteries:

Answer 29

Anterior and posterior cerebral arteries | anterior and posterior communicating arteries