Components of the Intracranial Vault

Question 1

Blood supply to the brain:

Answer 1

B/L Carotid bodies
B/L Vertebral arteries

Question 2

The left CA arises from the _____ _____.

Answer 2

Aortic Arch

Question 3

The right CA arises from the _______ ______.

Answer 3

Innominate Artery

Question 4

The Internal CA enters the …….

Answer 4

base of the skull.

Question 5

The External CA remains……..

Answer 5

superficial to the skull

Question 6

Internal Carotid Arteries (ICA) supplies……….

Answer 6

Arterial supply to the Circle of Willis

Arterial supply of the eye via the ophthalmic artery

Ultimately bifurcates into the anterior and middle cerebral arteries

Question 7

Circle of Willis

Answer 7

Vertebral
Basilar
Posterior Cerebral
Posterior Communicating
Internal Carotid
Middle Cerebral
Anterior Communicating
Anterior Cerebral

“Very Big Posterior Polyps Invaded My Aching Ass”

Question 8

______ covers the brain and spinal cord.

Answer 8

Meninges

Question 9

Meninges consists of ____, ____, and _____.

Answer 9

Dura mater
Arachnoid mater
Pia mater

Question 10

Where does CSF circulate?

Answer 10

in the subarachnoid space (between arachnoid and pia mater)

Question 11

The ______ ______ contains the blood supply to the brain

Answer 11

Arachnoid Mater

Question 12

What layer drains the CSF?

Answer 12

Dura Mater

Question 13

Dura Mater consists of…..

Answer 13

Consists of an outer (endosteal layer) and an inner (meningeal layer)

Dural sinus are between these layers

Question 14

Which hematoma has a faster onset of symptoms?

Answer 14

Epidural Hematoma!

Question 15

Epidural hematoma definition:

Answer 15

Bleeding between the skull and dura mater
Usual arterial in origin (meningeal arteries)

Question 16

Subdural hematoma definition:

Answer 16

Bleeding between the dura and arachnoid mater
Usually resulting from tears inbridging veins

Question 17

Subarachnoid hemorrhage definition:

Answer 17

Bleeding between the arachnoid membrane and the pia mater
Usually from a rupturedcerebral aneurysm

Question 18

The _______ are lined by ependymal cells which help to form the choroid plexus

Answer 18

Ventricles

Question 19

There are _____ lateral ventricles in the cerebral hemispheres

Answer 19

2

Question 20

Third ventricle is located in the ________.

Answer 20

diencephalon

Question 21

Fourth ventricle is located between the _____ and the _______.

Answer 21

pons and cerebellum

Question 22

CSF site of production:

Answer 22

Choroid Plexus in the cerebral ventricles

Question 23

CSF: __-__% of intracranial volume

Answer 23

10-15%

Question 24

Total volume of CSF and how much is produced per 24 hours?

Answer 24

150cc total volume
500cc produced per day

Question 25

CSF function

Answer 25

“maintains a milieu in which the brain can function by regulating pH and electrolytes, carrying away waste products, and delivering nutrients.”

Question 26

CSF Flow:

Answer 26

through ventricles --> arachnoid space ---> dural sinuses ----> back to circulation

Question 27

The 2 lateral ventricles are within the ______ ______ and communicate with the third ventricle through the _____ ___ _______.

Answer 27

Cerebral hemispheres Foramen of Monroe

Question 28

The third ventricle is inside the substance of the _______, dividing it to 2 lateral parts. The floor of tis ventricle is the _____ _____.

Answer 28

thalamus optic chiasm

Question 29

The fourth ventricle, which communicates with the third ventricle via the ______ ____ ______, lies anterior to the _______and has a connection to the subarachnoid space through the_____ ____ ___ ______ and 2 lateral ____ ___ _______.

Answer 29

-aqueduct of sylvius -cerebellum - median foramen of Magendie -foramen of Luschka

Question 30

Site of CSF reabsorption:

Answer 30

Arachnoid villi

Question 31

Pathway between lateral and third ventricle:

Answer 31

Foramen of Monroe

Question 32

Pathway between third and fourth venticle

Answer 32

Aqueduct of Sylvia's