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Core Concepts & Fundamentals Flashcards

7 cards from real RPSGT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  1. According to AASM scoring rules, what is the minimum duration of a sleep epoch?

    Answer: 30 seconds

    The AASM standard epoch length for sleep scoring is 30 seconds.

  2. Which EEG frequency band is characterized by 8–13 Hz activity and is most prominent in quiet wakefulness with eyes closed?

    Answer: Alpha

    Alpha waves (8–13 Hz) are the hallmark of relaxed wakefulness with eyes closed.

  3. In polysomnography, what does the term 'montage' refer to?

    Answer: The specific combination and arrangement of recording channels

    A montage is the defined set of channels and their derivations used during a PSG recording.

  4. Stage N3 sleep is defined by what minimum percentage of slow-wave activity (SWA) per epoch?

    Answer: 20%

    AASM criteria require at least 20% of the epoch to consist of slow-wave (delta) activity to score N3.

  5. Which neurotransmitter is most responsible for the muscle atonia seen during REM sleep?

    Answer: Glycine and GABA

    Glycine and GABA act on spinal motor neurons to produce the hyperpolarization that causes REM atonia.

  6. What is the primary purpose of applying electrode paste or gel during PSG electrode placement?

    Answer: To reduce impedance and improve electrical contact

    Electrode paste/gel lowers skin impedance, allowing cleaner electrical signal acquisition.

  7. Which of the following best describes 'sleep efficiency'?

    Answer: The percentage of time in bed actually spent asleep

    Sleep efficiency = (total sleep time / time in bed) × 100, expressed as a percentage.

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