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The EEG of an aphasic patient whose computed
tomography scan reveals a subdural hematoma is most
likely to show- a. right temporal spike and wave focus
b. attenuation of background in the left hemisphere
c. left hemispheric pled (lPDs)
d. generalized polyspikes - ANSWER-b. attenuation of
background in the left hemisphere
Intracerebral hemorrhage from the middle cerebral artery would
most likely produce an EEG finding of---------
a. periodic bursts of high amplitude theta activity over the
ipsilateral hemisphere
b. delta activity maximal over the frontotemporal area of
affected hemisphere
c. spike and wave complexes over the affected hemisphere
d. Alpha coma - ANSWER-b. delta activity maximal over the
frontotemporal area of affected hemisphere
A diagnosis of an astrocytoma in the left frontal lobe is most
likely to produce
,which of the following EEG
findings:
a. generalized polymorphic
delta activity
b. focal delta activity in the right
hemisphere
c. left frontal focal spike
activity
d. left frontal burst suppression - ANSWER-c. left frontal
focal spike activity
This type of EEG activity most often appears in association with
rapidly growing
tumors such as glioblastoma multiform and cerebral
metastatic lesions -
ANSWER-polymorphic delta
activity
Which of the following EEG patterns carries a poor prognosis
and is often the result of a respiratory or cardiac arrest? -
ANSWER-Non-reactive continuous alpha
Which of the following is related to an alpha
coma pattern?
a. reactivity to external
stimuli
b. usually indicates a good
prognosis
,c. is only present when the patient is alert
and oriented
d. an atypical distribution of alpha - ANSWER-d. an atypical
distribution of alpha
Electro cerebral inactivity is defined as no electrical
activity greater than:
a. 0.5uV
b. 1.0uV
c.
2.0uV
d. 3.0uV - ANSWER-c.
2 0uv
The triad of cataplexy, sleep paralysis, and hypnagogic
hallucinations is seen
in- - ANSWER-
narcolepsy
The sleep disorder that occurs most commonly in the adult
population is? -
ANSWER-sleep
apnea
The purpose of the multiple sleep latency test (MSLT) is
to- - ANSWER-
Quantify the patients sleepiness and identify
REM onset
, Which test would be most beneficial in evaluating
suspected narcolepsy? -
ANSWER-Multiple sleep
latency test
benzodiazepines such as Ativan (lorazepam), at therapeutic
levels can cause- -
ANSWER-front-central
beta
The drug phenytoin aka Dilantin, will have little effect on the
EEG at therapeutic levels, however when approaching toxic
levels the drug can cause what EEG change:
a. an increase in beta
b. a slowing in the background alpha
c. frontal beta
d. Bursts of temporal theta - ANSWER-b. a slowing in the
background alpha
Sodium amytal is used for- - ANSWER-Wada test
Increasing depth of anesthesia causes which of the following
sequences?
a. increased beta then intermixed theta then delta, with burst
suppression if anesthesia is deep enough
b. burst suppression then delta then theta
c. loss of alpha then increased theta then widespread beta