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Non-Linear Effects of Acute Sleep Deprivation on Spatial Working Memory: Cognitive Depletion and Neural Compensation
Yongcong Shao1,2, Lin Xu1, Ziyi Peng1
1School of Psychology, Beijing Sport University, Beijing 100084, China.
Brain Sciences
|January 24, 2025
Summary
Acute sleep deprivation impairs spatial working memory, with performance declining after 24 hours. Neural mechanisms show a compensatory recovery trend between 24 and 36 hours of sleep deprivation.
Area of Science:
- Cognitive Neuroscience
- Sleep Research
Background:
- Spatial working memory is vital for cognitive functions.
- The effects of prolonged sleep deprivation on spatial working memory are not fully understood.
Purpose of the Study:
- Investigate spatial working memory changes during 36 hours of sleep deprivation.
- Explore the neural mechanisms behind these alterations.
Main Methods:
- 20 participants underwent 36 hours of sleep deprivation.
- Spatial 2-back task and event-related potentials (ERPs) were used.
- Assessments were made at 0, 12, 24, and 36 hours.
Main Results:
- Spatial working memory performance and ERP amplitudes significantly decreased after 24 hours.
- A recovery trend in P2, N2, and P3 ERP components was observed from 24 to 36 hours.
- These changes suggest temporal dependence and neural compensation.
Conclusions:
- 36-hour sleep deprivation has time-dependent effects on spatial working memory.
- Cognitive depletion is followed by a compensatory phase.
- Findings reveal non-linear cognitive impairment and adaptive mechanisms.
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