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Sleep Spindles
Brief bursts of brain activity noticeable in EEG recordings during stage 2 of sleep, associated with learning, memory consolidation, and synaptic plasticity.
Stage 2 Sleep
A phase of sleep that is part of the non-REM sleep cycle, characterized by specific brain wave patterns including sleep spindles and K-complexes.
Human Sleep Cycle
The progression through various stages of non-REM and REM sleep that repeats cyclically over a night's sleep.
Deep Sleep
A stage of sleep characterized by slow brain waves, associated with physical and mental restoration.