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Brain mechanisms for mood congruent memory facilitation.
P A Lewis1, H D Critchley, A P Smith
1Functional Imaging Laboratory, 12 Queen Square, WC1N 3AR, London. p.lewis@fil.ion.ucl.ac.uk
Neuroimage
|April 27, 2005
Summary
Matching moods enhance memory recall. This study found that positive or negative moods improve memory for similarly valenced information, supporting an associative memory model.
Area of Science:
- Cognitive Neuroscience
- Psychology
- Neuroimaging
Background:
- Memory recall is influenced by emotional state, with mood-congruent information often better remembered.
- An associative memory model proposes that mood congruence reactivates emotional associations during retrieval.
Purpose of the Study:
- To test the associative memory model's prediction of mood-congruent memory facilitation.
- To investigate the neural mechanisms underlying mood-congruent memory effects using functional imaging.
Main Methods:
- Subjects studied positive and negative words, with mood manipulated during retrieval.
- Functional magnetic resonance imaging (fMRI) monitored brain activity during memory tasks.
- Subjective mood ratings and heart rate variability assessed mood manipulation effectiveness.
Main Results:
- Mood manipulation was effective, showing a trend towards memory facilitation in congruent conditions.
- fMRI data revealed shared neural activity in subgenual cingulate (positive valence) and posteriolateral orbitofrontal cortex (negative valence) during congruent recall.
- Congruence activated episodic memory systems during correct rejections, not correct remembering, suggesting recall-level effects.
Conclusions:
- Findings support the associative memory model by demonstrating mood-congruent memory facilitation linked to specific neural substrates.
- Mood-congruent facilitation appears to operate at the level of attempted recall rather than successful recollection.