Resting-state functional connectivity does not predict individual differences in the effects of emotion on memory

Area of Science:

• Neuroscience
• Cognitive Psychology
• Neuroimaging

Background:

• Emotional events are typically better remembered than neutral ones, often attributed to enhanced brain functional coupling during emotional processing.
• Most research has focused on functional connectivity during or after learning, leaving the role of resting-state functional connectivity in emotional memory unclear.

Purpose of the Study:

• To investigate the association between individual differences in resting-state functional connectivity and emotional memory performance.
• To determine if whole-brain functional connectivity at rest predicts emotional enhancement and positivity bias effects.

Main Methods:

• Analysis of resting-state functional magnetic resonance imaging (fMRI) data and emotional memory scores from 303 participants (aged 18-87 years) from the Cambridge Centre for Ageing and Neuroscience database.
• Application of regularised regression to identify relevant brain connections and assess their predictive power for emotional memory measures.

Main Results:

• Resting-state functional connectivity successfully predicted age and intelligence, replicating previous findings.
• Whole-brain resting-state functional connectivity did not predict the emotional enhancement effect (better memory for emotional vs. neutral events).
• Resting-state functional connectivity did not predict the positivity bias effect (better memory for positive vs. negative events).

Conclusions:

• Individual differences in resting-state functional connectivity show a small or no association with emotional memory.
• These findings challenge the utility of resting-state functional connectivity for predicting individual differences in emotional memory behaviors.