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Brain Imaging Investigation of the Impairing Effect of Emotion on Cognition
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Negative emotion modulates prefrontal cortex activity during a working memory task: a NIRS study.

Sachiyo Ozawa1, Goh Matsuda1, Kazuo Hiraki1

  • 1Graduate School of Arts and Science, The University of Tokyo, JST, CREST Tokyo, Japan.

Frontiers in Human Neuroscience
|February 28, 2014
PubMed
Summary
This summary is machine-generated.

Cognitive control of emotion involves prefrontal brain regions. Near-infrared spectroscopy (NIRS) revealed greater hemodynamic responses in the medial prefrontal cortex when participants performed working memory tasks after viewing negative emotional pictures.

Keywords:
DLPFCIAPSNIRScognitive controlemotion regulationn-back taskprefrontal activityworking memory

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Brain Imaging

Background:

  • Cognitive control of emotions is crucial for daily functioning.
  • Prefrontal cortex regions are implicated in emotional regulation.
  • Understanding neural mechanisms of emotional control is an active research area.

Purpose of the Study:

  • To investigate the neural processing of cognitive control of emotions.
  • To examine hemodynamic responses in the prefrontal cortex during a working memory task preceded by emotional stimuli.
  • To assess the utility of near-infrared spectroscopy (NIRS) in studying emotional control.

Main Methods:

  • Used a 16-channel near-infrared spectroscopy (NIRS) system to measure hemodynamic responses.
  • Participants viewed negative or neutral pictures from the International Affective Picture System (IAPS).
  • Assessed changes in oxygenated hemoglobin (oxyHb) during a 1-back or 3-back working memory task.

Main Results:

  • Emotional valence of pictures affected oxyHb changes in the medial prefrontal cortex (MPFC) and left inferior frontal gyrus during the n-back task.
  • Significantly greater oxyHb changes were observed following negative versus neutral picture stimulation.
  • No significant effects of emotion were found on oxyHb changes during picture presentation or on n-back task performance.

Conclusions:

  • Findings suggest NIRS can effectively investigate neural processing during emotional control.
  • Observed prefrontal activation may reflect cognitive control of emotion, though emotional responses cannot be ruled out.
  • Further research is needed to confirm the interpretation of neural activity.