RPSGT RPSGT Electroencephalography & Signal Interpretation

Question 1

According to AASM scoring rules, which EEG electrode derivations are used for adult sleep staging?

Accepted Answer

F4-M1, C4-M2, and O2-M1

Answer

F4-M1 only

Answer

C4-M2 only

Answer

O2-M1 only

Question 2

K-complexes are most prominently identified in which EEG derivation?

Accepted Answer

Frontal (F3/F4)

Answer

Occipital (O1/O2)

Answer

Central (C3/C4)

Answer

Temporal (T3/T4)

Question 3

Alpha rhythm is defined as EEG activity in the frequency range of:

Accepted Answer

8–13 Hz

Answer

0.5–2 Hz

Answer

4–8 Hz

Answer

13–30 Hz

Question 4

Sleep spindles are generated primarily by which brain structure?

Accepted Answer

Thalamus

Answer

Hippocampus

Answer

Amygdala

Answer

Basal ganglia

Question 5

Which EEG waveform, when occupying ≥20% of a 30-second epoch, defines N3 (slow-wave) sleep?

Accepted Answer

Delta waves (0.5–2 Hz, >75 µV amplitude)

Answer

Theta waves (4–7 Hz)

Answer

Sleep spindles (12–15 Hz)

Answer

Alpha waves (8–13 Hz)

Question 6

Saw-tooth waves on EEG during PSG are characteristic of which sleep stage?

Accepted Answer

REM

Answer

N1

Answer

N2

Answer

N3