RPSGT Core Concepts & Fundamentals 3

Question 1

K-complexes are characteristic of which sleep stage?

Accepted Answer

Stage N2

Answer

K-complexes are the defining EEG feature of Stage N2, appearing as sharp negative deflection followed by a positive component.

Question 2

What is the standard low-frequency filter (LFF) setting typically used for EEG channels in PSG?

Accepted Answer

0.3 Hz

Answer

A low-frequency filter of 0.3 Hz is the standard for EEG to preserve slow-wave components while removing DC drift.

Question 3

The international 10-20 electrode placement system gets its name from what?

Accepted Answer

The 10% and 20% intervals measured between skull landmarks

Answer

Electrode positions are placed at 10% and 20% intervals between four skull landmarks (nasion, inion, and preauricular points).

Question 4

During REM sleep, which of the following is NOT typically observed?

Accepted Answer

Sleep spindles

Answer

Sleep spindles are a feature of NREM sleep (N2) and do not occur during REM sleep.

Question 5

What is the typical duration of a sleep spindle?

Accepted Answer

0.5–3 seconds

Answer

Sleep spindles last 0.5–3 seconds and appear as waxing-and-waning oscillations at 11–16 Hz.

RPSGT Exam Practice Test