Meninges

Question 1

A cut through what layer in the scalp would result in a gaping wound?

Answer 1

Aponerosis

Question 2

What layer of scalp does infection spread through?

Answer 2

Loose connective

Question 3

What are the two layers of the Dura?

Answer 3

• Periosteal
  
  • fused to bone
• Meningeal

Question 4

What layer of Dura forms sinuses?

Answer 4

meningeal

Question 5

Where does the middle meningeal artery sit?

Answer 5

• In between two layers of the dura

Question 6

What layer of dura continues into the spinal cord?

Answer 6

meningeal

Question 7

What part of the arachnoid matter gives structure to subarachnoid space and make it a real space?

Answer 7

Arachnoid trabeculae

Question 8

Whar part of arachnoid transverses the meningeal dura into dural venous sinuses?

• continues as arachnoid into venous system and allows for drainage into venous from CSF

Answer 8

• Arachnoid granulations

Question 9

What layer of the meninges is adherent to the brain and highly vascularized?

• you cant really pick it out

Answer 9

Pia

Question 10

What dural partition seperates the right and left cerebral hemispheres?

• largest infolding
• in the longitudinal cerebral fissure

Answer 10

Falx Cerebri

Question 11

What dural partition seperates cerebrum from cerebellum?

• 2nd largest
• falx cerebri attaches to this and help to hold it up

Answer 11

Tentorium Cerebelli

Question 12

What dural partition seperates right and left cerebellum?

Answer 12

Falx cerebelli

Question 13

What dural partition is an opening for infundibulum?

• makes house for pituitary to sit on

Answer 13

Diaphragma sellae

Question 14

What do the dural venous sinuses drain?

Answer 14

• Dipolic veins
• emissary veins
• CSF
  
  • all of these are drained into internal jugular vein via the venous sinuses

Question 15

What dural venous sinus drains into the internal jugular vein?

Answer 15

Sigmoid

Question 16

What drains the cavernous sinus?

Answer 16

Superior petrosal and inferior petrosal

Question 17

Where is the CSF made?

Answer 17

Choroid plexus of the ventricles

Question 18

What is hyrdocephalus?

Answer 18

• overproduction of CSF, obstruction of CSF flow, or interferance with CSF absorption results in excess fluid in the cerebral ventricles and enlargement of the head
• obstruction usually occurs in the cerebral aquaduct
• water on the brain

Question 19

Arteries of the Dura supply more blood to what?

Answer 19

• Calavria (bone) than dura

Question 20

Is the epidural space in brain a real space or potential space?

• between cranium and periosteal layer

Answer 20

Potential

• shouldnt be there

Question 21

Is the subdural space in brain a real space or potential space?

• dural-arachnoid interface
  
  • between dura and aracnoid

Answer 21

Potential space

• shouldnt be there

Question 22

Is the subarachnoid space in brain a real space or potential space?

• between arachnoid and pia

Answer 22

• real space-should be there
• contains CSF, arteries (circle of willis) and veins
• arachnoid tubercle give structure to this space

Question 23

Is the subpial space in brain a real space or potential space?

• between pia and cortex of brain

Answer 23

• potential space-shouldnt be there

Question 24

What is this hematoma:

• bleeding: between cranium and periosteal dura
• source: usually middle meningeal artery
• common site: fracture of squamous temporal bone or pterion

Answer 24

Epidural hematoma

Question 25

What is this hematoma: * bleeding: between dura and arachnoid mater * source: venous, usually cortical vein/dural sinus

Answer 25

Subdural hematoma

Question 26

What is this hematoma: * bleeding: within subarachnoid space * source: usually cerebral artery

Answer 26

Subarachnoid hematoma

Question 27

What is this hematoma: * bleeding: between pia and cortex of brain * source: usually cerbral artery (middle)

Answer 27

Intracerebral (Subpial) Hematoma

Question 28

What connects the dural venous sinuses with veins outside the cranium?

Answer 28

Emissary veins

Question 29

What drains inferiorly through the superior and inferior petrosal sinuses and emissary veins to the basilar and pterygoid plexuses?

Answer 29

* Cavernous sinus

Question 30

Describe the flow of CSF around the brain

Answer 30

* Leaves the lateral ventricles through the interventricular foramina and enters the 3rd ventricle * Then it passes through the cerebral aquaduct into the 4th ventricle * Some CSF leaves this ventricle through its median and lateral apertures and enters the subarachnoid space, which is continuous around the spinal cord and over the cerebellum * most CSF flows into interpeduncular and quandragernial cisterns * Lateral ventricle-\>interventricular foramen-\>3rd ventricle-\> cerebral aquaduct-\>4th ventricle-\>subarachnoid space

Question 31

What is inside the cavernous sinus?

Answer 31

* CNs 3, 4, V1, V2 in the lateral walls * Contains CN6 adn internal carotid artery surrounded by carotid plexus of sympathetic nerves within sinus

Question 32

How is CSF returned to blood stream?

Answer 32

* Via arachnoid granulations and villi

Question 33

CSF drains primarily into what sinus?

Answer 33

Sagittal

Question 34

What meningeal space contains CSF?

Answer 34

Subarachnoid