Yale Maps How Stress Strengthens Emotional Memory — SkimNews
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- Elizabeth Goldfarb and Yale colleagues discovered cortisol strengthens emotional memories by changing how emotion and memory brain networks communicate, published in Science Advances.
- The double-blind, crossover study gave participants hydrocortisone or a placebo before viewing pictures during fMRI scanning, with memory tested the following day.
- Researchers analyzed functional connectivity during ~5-second individual trials rather than the usual minutes of data, predicting both emotional intensity and next-day memory separately.
- Cortisol produced more consistent activity and increased engagement in emotion networks while making memory networks more specialized for emotional content.
- The hormone also increased coordination between emotion and memory networks, with Goldfarb noting stress responses are "fundamentally adaptive" for selectively memorable experiences.
- Co-authors Rajita Sinha and Todd Constable contributed to the study, funded by the National Institutes of Health.
Why it matters: Goldfarb's team mapped how cortisol selectively boosts memory for emotionally intense experiences — not all memories, just meaningful ones. The researchers note that connecting new information to strong emotions during stress helps retention, offering a practical angle for students and educators navigating stressful learning periods.
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