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Sleep Deprivation Linked to Impulsivity and Cognitive Decline

11/17/2025

Summary

Story summary

Researchers from Harvard University, the University of Arizona, and the University of Pennsylvania introduced the 'Mind After Midnight' hypothesis.
The hypothesis ties late-night impulsivity and emotional instability to altered brain chemistry and reduced prefrontal cortex activity.
A separate Massachusetts Institute of Technology (MIT) study finds sleep deprivation impairs cognition by hindering the brain's ability to clear toxic waste.
Together, the studies emphasize sleep's role in mental clarity and emotional balance.

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Story summary

Researchers from Harvard University, the University of Arizona, and the University of Pennsylvania introduced the 'Mind After Midnight' hypothesis.
The hypothesis ties late-night impulsivity and emotional instability to altered brain chemistry and reduced prefrontal cortex activity.
A separate Massachusetts Institute of Technology (MIT) study finds sleep deprivation impairs cognition by hindering the brain's ability to clear toxic waste.
Together, the studies emphasize sleep's role in mental clarity and emotional balance.