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Flashcards in Unit 3: skull and brain Deck (49)
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reticular activating system

on/off switch for consciousness

1

Brain stem

regulates autonomic functions, eye and auditory reflexes contains midbrain, pons, and medulla oblongata

2

cerebellum

large brain mass lying posterior to BS and inferior to cerebrum, coordination and modulation of complex movements

3

Midbrain CN

III and IV

4

pons CN

V, VI, VII, VIII

5

cerebellum effect on movement

doesnt generate any movement by itself, but fine tones everything, like eating a brownie in class, damage in cerebellum disrupts this

6

Medulla oblongata CN

CN IX, X, XI, XII

7

Dysarthria

disruption in speak

8

nystagmus

disruption in eye movement

9

Midline lesion of cerebellum

loss of postural control

10

distal lesion on cerebellum

effect function of arms and legs

11

Cerebellar lesions tends to be

ipsilateral, if on right side it will effect right arm

12

ventricles

protective function and clean up rubbish, supports and buffers brain against sudden movement, tightly regulated

14

Number of ventricles

2 lateral (cerebral hemispheres) and 2 midsaggital (diencephalon and anterior to cerebelum

15

choroid plexus

colored network of vessels, produces spinal fluid; leave brain behind inferior portion of cerebellum

16

lateral ventricle

in each hemisphere, separated by septum pellucidium

16

midsaggital ventricle

3rd-diencephalon, intraventricular foramen communicates with lateral ventricles; 4th inferior to cerebellum and into BS

17

cerebral aquiduct

runs through midbrain and communicates with 3rd and 4th ventricle, contains CSF

18

ependynmal cells

work in conjuction with capilaries to mak efluid

19

partial blindness

occipital

20

CSF circulation

choroid plexuses-> ventricular system-> medial&lateral aperatures-> subarachnoid space->circulation-> arachnoid granulations- dural venous sinuses

21

difficulty remembering words

parietal

22

clear fluid from nose

temporal bone let fluid escape from dura letting csf escape

23

unsteady gait but no sensory loss

cerebullum

24

nystagmus

pons, midbrain

25

blood supply arteries

thin walls, no vasa vasora, no int elastic lamina, thin tunica media, prone to hypertension

27

function of blood supply

collateral circulation route-> safegaurd against ischemia, equalize blood flow

28

veins of brain

no muscle no valves, do no follow arteries, open into sinuses

28

circle of willis

anterior cerebral, middle cerebral, posterior communicating and posterior cerebral

29

internal carotid

circle of willis, enters through temporal bone, courses anteriorly through cavernous sinus, forms middle cerebral arteries, supplies later side of hemisphere