RPSGT Data Analysis & Reporting 4

Question 1

Which of the following leg movement events should NOT be included in the PLM index calculation?

Accepted Answer

Movements occurring within 0.5 seconds of an apnea termination

Answer

AASM rules exclude leg movements occurring within 0.5 seconds before or after a respiratory event from the PLM count.

Question 2

On a PSG report, WASO stands for:

Accepted Answer

Wake after sleep onset

Answer

WASO (Wake After Sleep Onset) is the total wake time occurring between sleep onset and the final awakening.

Question 3

An EEG epoch shows a burst of 12–15 Hz activity lasting 0.5 seconds over central derivations. This should be scored as:

Accepted Answer

Sleep spindle

Answer

Sleep spindles are 12–15 Hz (sigma) bursts lasting ≥0.5 seconds, typically maximal over central derivations.

Question 4

Which artifact most commonly mimics slow eye movements (SEMs) in EOG channels during drowsiness?

Accepted Answer

Sweat artifact

Answer

Sweat artifacts produce slow, broad deflections in EOG channels that can resemble slow eye movements and must be distinguished by context.

Question 5

A patient has 45 minutes of REM sleep in 6.5 hours of TST. What is the REM sleep percentage?

Accepted Answer

13.8%

Answer

REM % = (45 min ÷ 390 min) × 100 = 11.5%; however 45/390 = 0.1154, rounding to 11.5% — wait, 45/390=0.1154=11.5%. Select 11.5%.

RPSGT Exam Practice Test