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R. EEG T. > EEG Boards II > Flashcards

EEG Boards II Flashcards

1
Q

Sphenoidal electrodes are used to record activity from the

A

anterior temporal lobes

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2
Q

If a patient starts to have a seizure during photic stimulation, the technologist should

A

turn off photic stimulator

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3
Q

The interictal EEG of children with a history of untreated febrile seizures usually is

A

Normal

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4
Q

Asychrony of sleep spindles is abnormal after

A

2 years old

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5
Q

Calculate the duration of the waveform in the box

A

150 msec

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6
Q

What type of response to photic stimulation is characterized by generalized spike-and-wave discharges continuing after the last flash?

A

Photoparoxysmal

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7
Q

Which of the following is one of the 10 ACNS Guidelines for ECI recordings?

A

Use of double distance montages

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8
Q

Which of the following medications would be expected to increase beta fequency activity?

A

Xanax (alprazolam)

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9
Q

Difference between epileptic seizures vs. non-epileptic events.

A

Prolonged duration LOC

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10
Q

Photic Driving is most common at what fequencies?

A

9-13 Hz

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11
Q

Referential recording is most appropriate for measuring

A

Voltage

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12
Q

What differentiates Lambda and POSTS:

A

Occurs with eyes open

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13
Q

What do Mittens, midline rhythmic theta, and trace alternans have in common?

A

They are all normal waveforms

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14
Q

A posterior dominant rhythm reactive to eye closure first appears around

A

3-6 months

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15
Q

Which of the following patterns is characteristically eliminated by movement of a limb?

A

Mu rhythm

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16
Q

During an ECI recording, what is the highest sensitivity that must be included in the recording?

A

2uv/mm

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17
Q

LPDs

A

Lateralized periodic discharges

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18
Q

Which of the following represents a poor prognosis?

A

Alpha Coma

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19
Q

Of the following, which is NOT an ACNS guideline for ECI recording?

A

Record at the standard sensitivity setting of 7AuV/mm for at least 30 minutes of the recording

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20
Q

A 9 mm deflection at a setting of 20 microvolts/mm will have an input signal of

A

180 microvolts

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21
Q

Mu rhythm and alpha rhythm differ from each other in all of the follwoing respects EXCEPT:

A

frequency

22
Q

A patient has generalized tonic-clonic seizure during EEG recording. If one electrode is pulled off, which of the following is the primary responsibility of the EEG technologist?

A

Protect the patient from injury andkeep EEG running

23
Q

When the posterior background rhythm does not attenuate with eye opening it is referred to as:

A

Bancaud Phenomenon

24
Q

The EEG of a patient with Lennox-Gastaut Syndrome is most likely to show:

A

1.5 Hz spike and wave discharges

25
Q

No difference in voltage between input 1 and input 2

A

Equipotential

26
Q

Low amplitutde 11-14 Hz, 1-2 sec duration, maximal in central regions.

A

Sleep spindles

27
Q

What is most useful when determining localization and polarity?

A

montage

28
Q

Which of the following is important for the technologist to document in order to aid in interpretation?

A

The patient was awake and alert during the recording.

29
Q

Trace Alternant

A

35 weeks conceptual age

30
Q

While recording using a bipolar montage, you notice that the channel c4-p4 is unusually flat compared to the other channels. What is a possible cause?

A

The electrodes are too close together.

31
Q

An EEG technologist observes what appears to be both Mu Rhythm andposterior dominant rhythm at the same time during the live EEG. What can they do to prove that the rhythm is MU?

A

Ask the patient to move their hand that is contralateral to the suspected Mu Rhythm

32
Q

Electrocerebral inactivity is defined as no EEG activity over

A

2 microvolts

33
Q

If 60 Hz artifact is present in two channels of an EEG tracing, the first step in troubleshooting should be to

A

check electrode impedance

34
Q

What is the duration of a 10 Hz wave at a display of 15 mm/second?

A

100 msec

35
Q

At what conceptional age is a delta brush pattern primarily seen?

A

32 to 34 weeks

36
Q

At therapeutic levels, phenytoin causes what kind of EEG findings?

A

No change

37
Q

Very high voltage, generalized, but anterior-dominant fast activity appearing as continuous sleep spindles sometimes found in mental retardation has been referred to as:

A

extreme spindles

38
Q

Which combination of settings will help enhance a low voltage slow wave that is being masked by muscle activity?

A

Sens 5; LF .3; Hf 35

39
Q

Which normal waveform is NOT typically seen in the posterior leads?

A

Wickets

40
Q

What type of seizure is associated with Lennox-Gastaut Syndrome?

A

All are correct

41
Q

What is the name of artifact that appears as a prominent R wave with positivity over the left posterior quadrant of the head and can resemble spikes?

A

ECG artifact

42
Q

Brain Abcess

A

Focal polymorphic delta activity

43
Q

What is the likely focus and the polarity of the sharply contoured wave in the box?

A

FP1 Negative

44
Q

An EEG shows eye blink and muscle artifact. What is the likely state of the patient?

A

Awake

45
Q

NREM Stage 1 (N1) sleep is characterized by all of the following EXCEPT:

A

Sleep spindles

46
Q

What type of monitoring would be useful in an EEG patient experiencing syncope?

A

ECG (EKG)

47
Q

Which neurologic syndrome may be associated with focal epilepsy?

A

Tuberous Sclerosis Complex

48
Q

High data sampling rates in a digital EEG machine create

A

Smooth, connected lines

49
Q

Signals common to both inputs of a differential amplifier with like frequency, amplitude and phase are:

A

canceled

50
Q

Broken lead wire during a recording:

A

requires replacement

R. EEG T. (2 decks)

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