The abstract is read at the publisher; the summary is JClub's.
Flatter dorsolateral prefrontal aperiodic spectral slopes in 69 epilepsy patients (19–61) performing virtual navigation are linked to preserved spatial memory despite age-related hippocampal theta and gamma power loss.
- Why it matters: Age-related changes in periodic and aperiodic brain activity are not well mapped across regions, and their relationship to memory decline is unclear.
- What they did: Direct intracranial recordings were used to separate oscillatory power from aperiodic components during virtual navigation, and hippocampal theta/gamma power and spectral slopes were analyzed with age and memory; hippocampal spectral changes were also tested in an independent resting-state dataset.
- The result: Hippocampal theta and gamma power decreased with age and correlated with impaired spatial memory, while aperiodic slopes flattened in prefrontal cortex and steepened in hippocampus, implying region-specific excitation-inhibition balance and a compensatory prefrontal mechanism.
The findingWhy it mattersWhat they didThe result
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