Caffeine reversed social memory deficits from sleep deprivation in study
The Story
Researchers at the National University of Singapore found that caffeine restored communication between neurons in a brain region responsible for social memory after sleep deprivation. The study, published in Neuropsychopharmacology, showed that caffeine reversed memory deficits caused by lost sleep in laboratory animals. The effects were targeted to the impaired circuit without overstimulating normal brain function.
Key Facts
- The study was led by Associate Professor Sreedharan Sajikumar and Dr. Lik-Wei Wong from the Yong Loo Lin School of Medicine at NUS Medicine.
- The research focused on the hippocampal CA2 region, which is critical for forming social memories.
- Laboratory animals were subjected to five hours of sleep deprivation, then received caffeine in drinking water for seven days.
- Electrophysiological recordings showed that sleep deprivation disrupted synaptic plasticity in the CA2 region, weakening neuron communication and causing deficits in social recognition memory.
- Caffeine administered before sleep deprivation restored synaptic communication and plasticity to normal levels.
- Caffeine’s effects were selective: it restored the disrupted pathway without overstimulating control animals that had not experienced sleep deprivation.
- The findings were published in Neuropsychopharmacology (DOI: 10.1038/s41386-026-02362-w).
Conflicting Reports
No conflicting reports identified in the source article.
Still Unclear
- Whether these findings apply to humans, as the study was conducted on laboratory animals.
- How caffeine influences memory consolidation and retrieval, which the researchers plan to investigate further.
Misconceptions
No widespread misconceptions addressed in the source article.
Key Figures
- Associate Professor Sreedharan Sajikumar – Department of Physiology, NUS Medicine; co-author
- Dr. Lik-Wei Wong – first author and researcher at NUS Medicine
Sources: ScienceDaily
