New research suggests that specific patterns of brain activity during sleep are linked to intelligence, independent of sleep duration. A 2026 study published in Frontiers in Sleep identified two key patterns: the strength and amplitude of fast sleep spindles, and the density of slower sleep spindles. Higher amplitude fast spindles correlated with better reasoning and processing speed across age groups, while a higher density of slower spindles was linked to stronger cognitive performance, particularly in adults. While these patterns are largely stable traits, maintaining good sleep hygiene can support the deeper non-REM sleep stages where these spindles occur. AI
RANK_REASON Research paper published in a scientific journal detailing new findings. [lever_c_demoted from research: ic=1 ai=0.1]
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