EEG Activation Procedures 2

Question 1

During hyperventilation activation in EEG, what is the expected normal response in an adult?

Accepted Answer

Generalized slowing that resolves within 1-2 minutes after cessation

Answer

Focal beta activity increase

Answer

Persistent asymmetric delta activity

Answer

Appearance of sleep spindles

Question 2

Photic stimulation at what flash frequency range is most likely to provoke a photoparoxysmal response in susceptible individuals?

Accepted Answer

15-20 Hz

Answer

1-3 Hz

Answer

30-40 Hz

Answer

50-60 Hz

Question 3

Which of the following is a contraindication for performing hyperventilation during an EEG?

Accepted Answer

Recent cerebrovascular accident

Answer

History of febrile seizures

Answer

Age over 40 years

Answer

History of generalized tonic-clonic seizures

Question 4

What is the recommended duration for hyperventilation during a routine EEG recording?

Accepted Answer

3 minutes

Answer

30 seconds

Answer

1 minute

Answer

10 minutes

Question 5

What EEG finding during photic stimulation represents a normal physiological response?

Accepted Answer

Photic driving response in occipital regions

Answer

Generalized spike-and-wave complexes

Answer

Photoparoxysmal response

Answer

Frontal intermittent rhythmic delta activity

Question 6

Sleep deprivation before an EEG is primarily used to:

Accepted Answer

Increase the likelihood of recording epileptiform discharges

Answer

Reduce muscle artifact throughout the recording

Answer

Improve electrode impedance

Answer

Shorten the overall recording time