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Flashcards in Space occupying lesions Deck (37)
1

5 layers of scalp (out to in)

S = Skin
C = Connective tissue
A = Aponeurosis
L = Loose connective tissue
P= Pericranium

2

thinest part of scalp called

pterion

3

bones that contribute to H shaped pterion

frontal, temporal, parietal, sphenoid

4

2 processes found on temporal bone

styloid and mastoid

5

'bump' on occipital bone

external occipital protuberance

6

artery that lies deep to pterion

middle meningeal artery

7

location of olfactory nerve in skull

crista galli of cribriform plate (ethmoid bone)

8

cerebral veins drain blood from ___ into ____

from brain into dural venous sinuses

9

sigmoid sinus drains into ______ at the _____

internal jugular vein at jugular foramen

10

what occurs at confluence of sinuses

connecting point of superior sagittal sinus, straight sinus, and occipital sinus in brain

11

where is the confluence of sinuses located

internal occipital protuberance (deep to external occipital protuberance)

12

blood supply to brain is via

vertebral arteries and internal carotids

13

pathway of blood to brain from heart on right side

arch of aorta > brachiocephalic trunk > common carotid > internal carotid
arch of aorta > brachiocephalic trunk > subclavian artery > vertebral arteries

** on left via common carotid artery coming off arch of aorta

14

what foramina do vertebral arteries pass through

transverse foramina of vertebra then through foramen magnum

15

posterior cerebral circulation goes to which areas

occipital lobe, cerebellum, and brains stem

16

what connects anterior cerebral circulation to posterior cerebral circulation

posterior communicating arteries

17

circle of willis is located where

along the floor of the cerebral vault

18

right anterior cerebral artery supplies what

medial aspect of right cerebral hemisphere

19

L & R vertebral arteries fuse to become?

basilary artery

20

what supplies blood to:

medial aspect
lateral aspect
posterior aspect

medial aspect - anterior cerebral artery
lateral aspect - middle cerebral artery
posterior aspect - posterior cerebral artery

21

what supplies visual cortex with blood

posterior cerebral artery

22

subarachnoid space located where

between pia mater and arachnoid mater

23

what produces CSF

choroid plexus (in ventricles)

24

at what level in spine does subarchnoid space stop

S2

25

what connects 3rd and 4th ventricles

cerebral aqueaduct

26

where does the 4th ventricle lie

between pons and cerebellum

27

4 parts of ventricle

L lateral ventricle
R lateral ventricle
3rd ventricle
4th ventricle

28

4th ventricle continues to become the

central canal

29

CSF is absorbed into dural venous sinuses via

arachnoid granulations

30

lumbar puncture can be done at what levels

L3/L4 or L4/L5

31

what is hydrocephalis

excessive production, obstruction to flow or inadequate reabsorption leads to an increased CSF volume

32

treat hydrocephalus with?

ventricular peritoneal shunt (tube from ventricles to peritoneal cavity)

33

3 types of bleeding that can occur in cranial cavity

extradural
subdural
subarachnoid

34

extradural haemorrhage location

between bones and dura

35

subdural haemorrhage location

separate dura form arachnoid

36

subarachnoid haemorrhage location

int CSF of subarachnoid space

37

cause of extradural haemorrhage

fracture of pterion/rupture of middle meningeal artery