Key concepts: Layers of meninges

Question 1

conditions

Answer 1

meningitis
headaches

Question 2

meninges

Answer 2

membranes
surround the brain and the spinal cord

Question 3

what are meninges called

Answer 3

dura mater
arachnoid mater
pia mater

Question 4

function of the meninges

Answer 4

protect and provide structural support for the brain
contain CSF

Question 5

dura mater

Answer 5

thick
tough
inextensible
adheres to the skull on one side and arachnoid mater on the other
attaches the brain to the skull and the spinal cord to the vertebral column
provides venous drainage

Question 6

arachnoid mater

Answer 6

cobweb appearance
less substantial
connective tissue called arachnoid trabecular which stretches to the Pia mater
subarachnoid space is the under layer which contains CSF

Question 7

pia mater

Answer 7

follows the contours of the brain, gyro and sulk
forms tight membrane around the brain and the spinal cord
aids in secretion and containment of CSF
blood vessels held against here before brain penetration

Question 8

epidural space

Answer 8

between the dura mater and vertebral column
can inject analgesics here

Question 9

lumbar cistern formation

Answer 9

dura and arachnoid mater extend several vertebrae below the spinal cord
lumbar cistern is formed

Question 10

what is the lumbar cistern

Answer 10

CSf filled area
no spinal cord present
area where lumbar puncture occurs

Question 11

what is the dura mater composed of

Answer 11

2 fused layers
periostea layer and meningeal layer

Question 12

what occurs when meningeal layer of the dura mater folds

Answer 12

dural reflections

Question 13

what are the main dural reflections

Answer 13

falx cerebri
tentorium cerebelli

Question 14

falx cerebri

Answer 14

flat sheet of dura mater that runs in the longitudinal fissure
separates the left and right hemispheres

Question 15

tentorium cerebelli

Answer 15

tent like sheet of dura covering the upper surface of the cerebellum

Question 16

what does the arachnoid mater contain

Answer 16

arachnoid granulations

Question 17

arachnoid granulations

Answer 17

protrude to superior sagittal sinuses for CSf reabsorption

Question 18

what does the Pia mater form

Answer 18

perivascular space
extends until the vessel= capillary

Question 19

real space

Answer 19

exists under normal conditions

Question 20

potential space

Answer 20

doesnt exist under normal conditions, pathogenically becomes real with blood accumulation

Question 21

potential spaces in the brain

Answer 21

epidural space
subdural space

Question 22

real space in the brain

Answer 22

subarachnoid space

Question 23

epidural space, potential

Answer 23

between the skull and periostea layer of the dura
meningeal arteries run through, middle specifically
becomes real with a bleed from the meningeal artery

Question 24

epidural hematoma

Answer 24

bleed from meningeal arteries

Question 25

subdural space, potential

Answer 25

between dura and arachnoid bridging veins drain the cerebral hemispheres through here to the dural venous sinus can rupture and cause a venous haemorrhage

Question 26

subdural hematoma

Answer 26

venous haemorrhage in the subdural space

Question 27

subarachnoid space, real

Answer 27

between the arachnoid and the Pia space is filled with CSF arterial aneurysm can rupture

Question 28

subarachnoid haemorrhage

Answer 28

arterial aneurysm ruptures in subarachnoid space

Question 29

layers outside to surface of brain superior to inferior

Answer 29

skull epidural space periosteal layer of dura meningeal layer of dura subdural space arachnoid subarachnoid space pia cerebral cortex