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The persistence of memory: prior memory responses modulate behavior and brain state engagement
Biorxiv : the Preprint Server for Biology
|April 22, 2024
Summary
Lingering memory states influence brain activity. Prior judgments unexpectedly alter current memory states, suggesting a shift to internal attention during dynamic cognitive tasks.
Area of Science:
- Cognitive Neuroscience
- Neuroscience
Background:
- Memory encoding and retrieval involve distinct brain states.
- These memory states may persist, influencing subsequent cognitive processes.
- Previous behavioral studies suggested lingering memory states, but neural evidence was lacking.
Approach:
- Used scalp electroencephalography (EEG) during a recognition memory task.
- Employed a validated multivariate mnemonic state classifier to analyze brain states.
- Investigated if memory brain states are modulated by memory judgments and persist over time.
Key Points:
- Neural findings contradicted predictions based on prior behavioral data.
- Prior responses significantly modulated current memory state engagement based on response congruency.
- Strong retrieval state engagement was observed on incongruent trials.
Conclusions:
- Cortical brain states are influenced by preceding judgments.
- A non-mnemonic internal attention state may be recruited in dynamic environments with changing cognitive demands.
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