PSYCHOLOGY OF EMOTIONS

Detailed explanation-1: -Sleep spindles may be present in all stages of NREM, but they are most prevalent in stage 2 sleep. View Source, which we tend to enter for the first time shortly after falling asleep. Sleep spindles do not occur during REM sleep.

Detailed explanation-2: -This drowsy period, called stage I sleep, eventually gives way to light or stage II sleep, which is characterized by a further decrease in the frequency of the EEG waves and an increase in their amplitude, together with intermittent high-frequency spike clusters called sleep spindles.

Detailed explanation-3: -Stage 2 NREM sleep sees a continued slowing of heartbeat, breathing, muscle activity, and eye movements. During this stage, you also experience a reduction in body temperature. Throughout the course of the night, you spend about half the time in stage 2 sleep.

Detailed explanation-4: -Spindles occur during both light NREM sleep and deep slow-wave sleep, but not during REM sleep. Sleep spindles preferentially coincide with the up-states of high-amplitude slow waves, yet can likewise be observed on their own, as is often the case during light NREM sleep. How are sleep spindles generated?

Detailed explanation-5: -Stage 2 Sleep Brain activity on an EEG shows relatively low-voltage, mixed-frequency activity characterized by the presence of sleep spindles and K-complexes (Figure 2-2). It is hypothesized that sleep spindles are important for memory consolidation.