RPSGT RPSGT Electroencephalography & Signal Interpretation 4

Question 1

Which EEG frequency band is most prominently associated with active cognitive processing and problem-solving?

Accepted Answer

Beta (13–30 Hz)

Answer

Beta activity predominates during active mental engagement, concentration, and problem-solving tasks.

Question 2

A 60-Hz artifact appearing on EEG channels is most likely caused by:

Accepted Answer

AC electrical interference

Answer

60-Hz artifact results from alternating current (AC) electrical interference from nearby equipment or poor grounding.

Question 3

During N3 sleep, the EEG is characterized by:

Accepted Answer

High-amplitude slow waves occupying ≥20% of the epoch

Answer

N3 is defined by slow-wave activity (0.5–2 Hz, ≥75 µV) comprising at least 20% of the 30-second epoch.

Question 4

Vertex sharp waves (V waves) in a sleep study are most characteristic of which sleep stage?

Accepted Answer

N1 sleep

Answer

Vertex sharp waves are electropositive transients maximal at the vertex and are a hallmark of N1 sleep.

Question 5

A HEOG (horizontal electro-oculogram) montage detects eye movements by placing electrodes:

Accepted Answer

At the outer canthi of each eye

Answer

HEOG electrodes are placed at the outer canthi (lateral edges) of each eye to detect lateral eye movements.

RPSGT Exam Practice Test