Brain activity during films best predicts your memory
Your brain at rest says less about your memory than previously assumed. Scientists found that brain activity during movie-watching is a much stronger predictor of memory performance.
Researchers compared three conditions: resting state (lying still in a scanner), watching a film, and performing a memory task. Using deep learning, they generated predictions of how well individuals would score on episodic memory (the ability to recall specific events) and working memory (holding information in mind during a task).
Movie-watching outperforms rest and task conditions
The researchers, publishing in eLife, found that the functional connectome during movie-watching best predicted individual cognitive differences across all domains. The resting-state connectome was also predictive, but only for episodic memory.
This has methodological implications. Much large-scale neuroimaging research measures brain activity at rest because it is simple to standardise. If movie-watching produces a richer brain state that yields better information about cognitive capacity, it could shift the standard approach for brain research. Whether this translates into improved clinical diagnostics remains uncertain.
Connection to physical health and aging
The same study (see also the article on dopamine and the brain cognition gap) shows that people whose brains underestimate their performance tend to be less physically active and have higher cardiovascular risk scores. That makes the finding relevant for aging research: the brain’s state during cognitive engagement may capture health risks that resting-state measurement misses.
The study was conducted in a healthy population without cognitive complaints. Whether the findings apply to older adults or people with cognitive decline has not been tested. The method is promising, but broader validation is needed before clinical conclusions can be drawn.
Search terms to explore further: resting-state fMRI cognitive prediction | episodic memory connectome | naturalistic neuroimaging task activation