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Brief bursts of activity that interrupt theta waves in stage 2 are called:
AAlpha bridges
BBeta clusters
CSleep spindles
DDelta plateaus
Answer & Solution
Correct answer: C. Sleep spindles
1. Stage 2 sleep has two distinctive waveform signatures.
2. Theta waves still dominate the activity of the brain in this stage.
3. They are interrupted by brief bursts of activity known as sleep spindles.
4. K-complexes are the other signature associated with stage 2 sleep.
_Source: OpenStax Psychology 2e (CC BY 4.0), Ch 4 'States of Consciousness', sections 4.1-4.6_
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