EEG Activation Procedures 5

Question 1

During sleep activation, which sleep stage is most important to capture for evaluating interictal epileptiform discharges in temporal lobe epilepsy?

Accepted Answer

Stage N2 (NREM 2)

Answer

Stage N2 sleep is the most important stage for activating interictal epileptiform discharges in temporal lobe epilepsy, as spikes are significantly enhanced during NREM sleep.

Question 2

A photic driving response seen on EEG during IPS is considered normal when it occurs at:

Accepted Answer

Harmonic or subharmonic frequencies of the flash rate over the occipital region

Answer

Normal photic driving is a rhythmic occipital response at the flash frequency or its harmonics/subharmonics and represents normal visual cortex activation.

Question 3

Which of the following would prompt the technologist to STOP hyperventilation immediately?

Accepted Answer

The patient develops a tonic-clonic seizure

Answer

A tonic-clonic seizure requires immediate cessation of HV and initiation of seizure safety protocols and notification of supervising physician.

Question 4

For a patient who cannot perform volitional hyperventilation (e.g., young child), an alternative activation method may include:

Accepted Answer

Having the child blow on a pinwheel or blow bubbles

Answer

Having young children blow on a pinwheel or blow bubbles is a standard pediatric technique to elicit sustained hyperventilation without requiring volitional cooperation.

Question 5

Eye closure during photic stimulation testing serves what purpose?

Accepted Answer

It enhances the photoparoxysmal response by removing fixation suppression

Answer

Eye closure removes fixation suppression, making it easier to elicit photoparoxysmal responses in susceptible individuals during IPS.

EEG - Electroencephalography Practice Test

EEG - Electroencephalography Practice Test

EEG Activation Procedures 5