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Brain Imaging Investigation of the Neural Correlates of Emotional Autobiographical Recollection
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Emojis influence autobiographical memory retrieval from reading words: An fMRI-based study.

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Emojis significantly impact memory retrieval. Emotional incongruity between words and emojis increases reaction times and activates specific brain regions like Broca's area, as shown by functional Magnetic Resonance Imaging (fMRI).

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Human-Computer Interaction

Background:

  • Social media communication lacks non-verbal cues, hindering emotional understanding.
  • Emojis evolved from emoticons to compensate for this lack of non-verbal stimuli.
  • Emojis are increasingly used to convey emotional content in digital communication.

Purpose of the Study:

  • To investigate the effect of emojis on memory retrieval using functional Magnetic Resonance Imaging (fMRI).
  • To examine how emotional congruity or incongruity between words and emojis influences memory recall.
  • To identify brain regions involved in processing emotional content conveyed by word+emoji combinations.

Main Methods:

  • An fMRI study involving fifteen healthy volunteers.
  • Presentation of stimuli combining emotionally charged words with congruent or incongruent emojis.
  • Participants were asked to recall memories associated with the stimuli.
  • Analysis of reaction times and fMRI data using General Linear Model (GLM) and Blind Source Separation (BSS).

Main Results:

  • Emotional incongruity between words and emojis led to significantly longer memory retrieval reaction times compared to congruent combinations.
  • fMRI data revealed that emotional incongruity activated the Broca's area (BA44 and BA45), Supplementary Motor Area (SMA), and inferior prefrontal cortex (BA47) in both hemispheres.
  • Word+emoji combinations, compared to pseudowords, activated the left Broca's area, amygdala, right temporal pole (BA48), SMA, and inferior prefrontal cortex.

Conclusions:

  • Emojis play a crucial role in modulating emotional content and memory retrieval processes.
  • Emotional incongruity in digital communication involving emojis engages specific neural networks related to language processing and emotional regulation.
  • The findings highlight the neural basis of how emojis influence cognitive functions, particularly memory and emotional processing.