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Sleep deprivation profoundly impairs our cognitive faculties, particularly the brain's ability to form, consolidate, and retrieve memories. When we lack adequate rest, the hippocampus, a region essential for learning and memory, experiences significantly reduced neural activity. This deficit prevents the brain from effectively transferring short term information into long term storage, a critical process that primarily occurs during deep sleep. Consequently, individuals who are sleep deprived struggle to retain new facts, learn complex new skil…

Sleep deprivation harms memory at several stages. When people do not get enough sleep, attention becomes less stable, so new information is encoded less accurately in the first place. Lack of sleep also disrupts consolidation, the process by which recently learned material is strengthened and integrated with existing knowledge. As a result, facts, skills, and experiences may be recalled less reliably the next day. Working memory is also affected: sleep-deprived people often struggle to hold and manipulate information, follow multistep instructi…