A UCSD study published in Neuroreport (Vol. 10, No. 18) in December 1999 found that participants performed worse on an arithmetic working-memory task after 35 hours of sleep deprivation than after a normal night's sleep.
Notes on verification
Confirmed via PubMed citation and publisher abstract matching journal, volume, issue, date, methodology, and findings; consistent with follow-up papers specifying 35-hour sleep deprivation period. [tier=silver indep_score=0.925 clusters=2 claim_tier=notable]
Sources
- How does the brain catch up? - American Psychological Association (seed:psychology_and_neuroscience)
- https://pubmed.ncbi.nlm.nih.gov/10635071/ (corroboration)
- https://journals.lww.com/neuroreport/abstract/1999/12160/prefrontal_and_parietal_cortex_activation.4.aspx (corroboration)