Free EEG Routine Questions and Answers

Question 1

Wave with a single deviation from the baseline, either up or down.

Accepted Answer

Monophasic

Answer

Monophasic waves have only one deflection from the baseline, either up or down. This indicates that there is only one phase or motion direction for the wave. Unlike polyphasic waves, it does not exhibit many phases or deflections. Paroxysmal describes abrupt, intense episodes, transient describes something that is fleeting or short-lived, and epileptiform describes waveforms that resemble those observed in epilepsy.

Question 2

What pattern does opening and closing the eyes affect?

Accepted Answer

Posterior Dominant Rhythm

Answer

The Posterior Dominant Rhythm is impacted by opening and closing the eyes. The electrical brain activity pattern known as the Posterior Dominant Rhythm is mostly present in the brain's posterior regions. It is usually noticeable when someone is awake and their eyes are closed; as they open their eyes, it becomes less noticeable. Therefore, opening and closing the eyes has an impact on the pattern.

Question 3

A wave with two or more components pointing in separate directions.

Accepted Answer

Polyphasic

Answer

A wave with two or more components pointing in distinct directions is said to be polyphasic. This indicates that the wave is made up of various phases or parts that are traveling in various directions. It could consist of waves or phases that are both positive and negative and are traveling in opposing directions. This phrase is frequently used in relation to brain waves or electrical activity, where polyphasic waves may be a sign of diseased or aberrant activity in the brain.

Question 4

Waveforms with pronounced contours that are deemed aberrant.

Accepted Answer

Sharp transient

Answer

The brain's electrical activity suddenly and briefly changes during sharp transient waveforms. People with epilepsy frequently exhibit these waveforms during ictal phases or seizures. Their outlines are clear and sharp, setting them apart from other waveform types like interictal or transient waveforms. These aberrant waveforms, which are often referred to as epileptiform activity, are indicative of aberrant brain activity and can be used to diagnose and track epilepsy.

Question 5

Waves that are regular and resemble sine waves.

Accepted Answer

Sinusoidal

Answer

Regular waves that mimic sine waves are called sinusoidal waves. They repeat in a smooth, regular rhythm with a constant amplitude and frequency. Numerous natural phenomena, including sound, electromagnetic, and water waves, frequently exhibit sinusoidal waves. The best phrase, among those provided, to characterize regular waves that approximate sine waves is sinusoidal.

EEG - Electroencephalography Practice Test

EEG - Electroencephalography Practice Test

Free EEG Routine Questions and Answers