Meninges

Question 1

describe the dura

Answer 1

attached to the skull

bridges crevices

Question 2

describe the arachnoid mater

Answer 2

delicate, sealed bag for CSF, bridges crevices

contains arachnoid trabeculae which travel across the subarachnoid space

Question 3

describe the pia

Answer 3

dips into crevices

Question 4

what are cisterns

Answer 4

spaces filled with CSF

Question 5

Name the cisterns

Answer 5

superior cistern, interpenduncular cistern, cisterna pontis, cisterna magna (cerebellomedularis)

Question 6

what type of meninges make up the denticulate ligaments in the spinal cord

Answer 6

pia

Question 7

describe brain veins

Answer 7

thin wall and no valves
lie in the subarachnoid space
drain into cranial venous sinuses
grouped into external and internal cerebral

Question 8

what are dural venous sinuses

Answer 8

venous channels found between layers of dura mater, allowing blood to drain to the confluence of sinuses

Question 9

describe blood drainage to the confluence of sinuses

Answer 9

blood flows from the superior sagital sinus, straight sinus and occipital sinus into the confluence of sinuses

it then drains to the transverse sinus and sigmoid sinus and ultimately to the internal jugular

Question 10

what is the tentorial notch

Answer 10

part of the tentorium cerebelli which the brainstem travels through

Question 11

how many times a day does CSF replace itself

Answer 11

4

Question 12

where is the intraventricular foramen

Answer 12

inbetween the lateral and third

Question 13

how is CSF made

Answer 13

formed in the choroid plexus
epithelium secretes cerebral spinal fluid

made in all ventricles

CSF flows out of ventricles into subarachnoid space via apertures in the fourth ventricle

Question 14

what are the two types of hydrocephalus

Answer 14

non communicative (blocked tranport)

communicative (blocked absorption or over production)