Meningies

Question 1

What do meningies do?

Answer 1

provide protection for the brain. (CNS)
contain, circulate, and recycle CSF. (cerebral spinal fluid)
innervated and vascularized.
contain dural sinuses and partitions.

Question 2

How many layers does the menengies have?

Answer 2

3

Question 3

Name the 3 layers of the meningies.

Answer 3

Dura mater (periosteal & Meningeal), arachnoid membrane, and Pia mater

Question 4

Dura Mater

Answer 4

outermost layer, thick collagenous layer, sits against inside of skull.

Question 5

arachnoid membrane

Answer 5

looks like and sticks like clear wrap. Thin. attaches to the innermost meningies.

Question 6

pia mater

Answer 6

surface of brain

Question 7

trabecule

Answer 7

prevent inflation of brain.

Question 8

“Spider web looking”

Answer 8

pia to trabecule

Question 9

Describe cerebral spinal fluid. whats its function?

Answer 9

water, some ions. glucose. Floats CNS, constantly recycled. 500cc produced per day. 150cc volume.

Question 10

what produces cerebralspinal fluid

Answer 10

choroid plexus and ventricles.

Question 11

when you do a spinal tap what fluid is it?

Answer 11

cerebralspinal fluid

Question 12

hydrocephalus

Answer 12

water on the brain, skull expands. Can be fixed by putting drain.
blockage in cerebralspinal production.
most common in adolescence.
not common in adults.

Question 13

how much is needed to float brain?

Answer 13

150mL

Question 14

cerebral spinal fluid is made where?

Answer 14

in ventricles

Question 15

We have spaces in brain that are filled with cerebral spinal fluid. True or False.

Answer 15

True

Question 16

how many ventricles do we have in brain?

Answer 16

4

Question 17

Describe the ventricles.

Answer 17

Located deep in CNS
Filled with CSF
2 Lateral, Third, Cerebral Aquaduct, Fourth
Continuous with Subarachnoid Space

Question 18

first place you can bleed in brain is where?

Answer 18

Epidera

Question 19

Arterial blood is low pressure and venous blood is high pressure. True or False.

Answer 19

False.
arterial= high pressure
venous= low pressure

Question 20

Blood gets into subarachnoid space and there is blood everywhere. “the worse headache of your life”. Bleeding out. Associated with hemmoratc stroke or brain injury.
What type of Hemmorrage?

Answer 20

Suprarchnoid Hemmorage

Question 21

sub dura is located where

Answer 21

underneath dura.

Question 22

blood drains from brain into dura. what keeps brain from floating around?

Answer 22

dura sinuses

Question 23

Outermost layer
2 adhered sublayers: 
Periosteal: lies against inner skull
Meningeal:lies against Arachnoid memb.
Dural sinuses lie between layers
Dural partitions are double meningeal layers
What layer of the brain menengies?

Answer 23

Dura

Question 24

Arachnoid membrane: Transparent sheet attached to Pia by collagen trabeculae.
Sub-arachnoid space: b/w arachnoid membrane and Pia
filled with CSF
Arteries and veins
What layer of the brain meningies?

Answer 24

Arachnoid membrane

Question 25

Dura has its own arteries and vessels. True or False.

Answer 25

True

Question 26

As you get older Dura sticks to the skull. True or False.

Answer 26

True

Question 27

blood in the space bw periostal duma and the skull.

Answer 27

Epideral Hemitoma

Question 28

Press on Ocular Motor nerve and you will get a "blown pupil" on the side where mass is. True or False

Answer 28

True

Question 29

What is the difference between an Epidural and a Subdural Hemotoma?

Answer 29

Epidurals are different from subdurals. Epidural= could kill you in an hour. EMERGENCY. If you put enough pressure on it its over. (Chronic) Subdural= low emergency situation, no symptoms, sub clinical. (football players get this from concosions) There brains look like old people brains. (Acute)

Question 30

Thin sheet attached to surface of CNS | Cannot be removed

Answer 30

pia mater

Question 31

separates right from left brain.

Answer 31

longitudinal fissure.

Question 32

``` Double layer sheets of meningeal dura Extend between major fissures of the brain Support and prevent excess movement Falx cerebri Tentorium cerebelli What is this? ```

Answer 32

dural partitions

Question 33

Venous passages between dural layers Drain venous blood from the brain Receive CSF overflow through arachnoid villi into Superior Sagital Sinus Drain into Internal Jugular vein Cavernous sinus surrounds sella turcica, including CN 3,4,6 Cavernous sinus thrombosis, infections who am I?

Answer 33

Dural Sinuses

Question 34

Cavernous sinuses are controlled by what arteries?

Answer 34

carotid arteries 3,4, and 6.

Question 35

Blood in potential space between Periosteal dura and skull Arterial, high pressure blood Rapid advance after Traumatic Brain Injury Increased intracranial pressure Fixed dilated pupil, papilledema What type of Hematoma is this?

Answer 35

Epideral Hematoma.

Question 36

Blood in potential space between meningeal dura and arachnoid membrane Low pressure venous blood Slow advance, older patients Chronic traumatic encephalopathy: athletes alcoholics, elderly. What type of Hematoma is this?

Answer 36

Subdural Hematoma

Question 37

Blood in subarachnoid space Traumatic injury or hemorrhagic stroke “Worst headache of my life”, sudden onset what type of Hematoma is this?

Answer 37

Subrarachnoid Hematoma