Skull and Cranial Vault

Question 1

pia mater

Answer 1

on brain not dissectable

areolar CT

Question 2

arachnoid mater

Answer 2

denes CT layer - more elastic and collagen fiber

forms subarachnoid space
-contains CSF

covers brain - not into sulci
except longitudinal fissure

Question 3

cisterns

Answer 3

area of accumulated CSF

Question 4

choroid plexus

Answer 4

forms CSF

Question 5

arachnoid granulations

Answer 5

absorbs CSF in superior sagittal sinus

Question 6

dura mater

Answer 6

dense fibrous CT - continuous with spinal dura at foramen magnum

Question 7

layers of dura mater

Answer 7

periosteal - periosteum of cranial vault adherent to meningeal dura

meningeal layer - duplications of dura prolonged between major portions of brain
-dural reflections

dura surrounds cranial nerves as well

Question 8

falx cerebri

Answer 8

extension of dura between cerebal hemispheres
attached anteriorly to crista galli

becomes continuous with tentorium cerebelli

contains superior sagittal sinus and inferior sagittal sinus

Question 9

tentorium cerebelli

Answer 9

tent over posterior cranial fossa
separates cerebellum from posterior portion of cerebral hemispheres

attached along occipital bone at grooves for transverse sinus
and to petrous ridge

encloses superior petrosal sinus

Question 10

tentoral notch

Answer 10

free anterior concave margion of tentorium which wraps around midbain

Question 11

rapid deceleration

Answer 11

tentorial notch can transcect midbrain

Question 12

straight sinus

Answer 12

sight of fusion of falx cerebri and tentorium cerebelli

Question 13

falx cerebelli

Answer 13

dura between cerebellar hemispheres
from tentorium above to occipital crest below

contains occipital sinus

Question 14

diaphragma sellae

Answer 14

specialized dura roof over hypophyseal fossa

Question 15

dural venous sinuses

Answer 15

endothelial lined spaces between opposed layers of dura

collect blood and CSF
-from brain, meninges, diploe, vertebral column, face, orbit, nasal cavity, parietal, mastoid, occipital areas

Question 16

emissary veins

Answer 16

communicate between dural sinuses and veins of scalp

no valves

Question 17

flow of dural venous sinuses

Answer 17

all to internal jugular vein

Question 18

superior sagital sinus

Answer 18

located in superior margin of falxi cerebri

begins at foramen cecum
ends at confluens of sinuses

receives blood and CSF

Question 19

arachnoid granulations

Answer 19

reabsorption of CSF in superior sagittal sinus

protrude into sinus at venous lacunae

Question 20

inferior sagittal sinus

Answer 20

inferior concave margin of falx cerebri
receive cerebral and meningeal veins

end at straight sinus

Question 21

straight sinus

Answer 21

junction of falx cerebri and tentorium cerebelli

receives inferior sagittal sinus and great cerebral vein

Question 22

great cerebral vein

Answer 22

rains core of cerebrum

Question 23

transverse sinus

Answer 23

bilateral continuations of superior sagittal sinus and straight sinus
perimeter of tenrotium at point just short of petrous portion of temporal bone

Question 24

sigmoid sinus

Answer 24

S-shaped
internal surface of temporal bone posterior to petrous ridge

confluent with jugular bulb at jugular foramen

receives superior petrosal sinus and inferior petrosal sinus

Question 25

occipital sinus

Answer 25

in falx cerebelli
surrounds foramen magnum to communicate with basilar sinus

opens superiorly at confluens

Question 26

confluens of sinuses

Answer 26

only when ALL meet

point of juncture of superior sagittal, straight, transverse, and occipital sinuses

Question 27

sphenoparietal sinus

Answer 27

bilaterally between opposed layes of dura along posteiror edge of lesser wing of sphenoid

drains dura to cavernous sinus

Question 28

end at pg 103

Answer 28

cavernous sinus