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Emotion-Attention Interaction in the Right Hemisphere.

Kaisa M Hartikainen1,2

  • 1Behavioral Neurology Research Unit, Tampere University Hospital, 33521 Tampere, Finland.

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The right hemisphere plays a dominant role in processing emotions and attention. Unpleasant emotional stimuli can capture attention, especially in right-hemisphere tasks, impacting cognitive performance and offering potential biomarkers for brain health.

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ERPFAAattentionbiomarkeremotionfrontal alpha asymmetryglobal processinginhibitory controlright hemispherethreat

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Neurology

Background:

  • Hemispheric asymmetries in affective and cognitive functions are well-documented.
  • The right hemisphere shows dominance in emotion, attention, and arousal processing.
  • Emotional stimuli, particularly threats, gain prioritized access to attentional resources.

Purpose of the Study:

  • To review the literature on the right hemisphere's role in emotion and attention.
  • To explore the interaction between affective and attentional processes.
  • To discuss clinical and technological implications of this interaction.

Main Methods:

  • Review of neuroscientific literature and neuropsychological evidence.
  • Examination of focal right hemisphere lesions and neurological syndromes (aprosodia, anosognosia, neglect).
  • Analysis of electrophysiological evidence and experimental studies in healthy subjects.

Main Results:

  • Right hemisphere dominance for emotion, attention, and arousal is supported by lesion and syndrome data.
  • Unpleasant emotional stimuli capture attention, especially in right-hemisphere-dependent tasks, leading to performance interference.
  • Evidence from neglect patients and healthy subjects highlights attention capture by emotional stimuli in the right hemisphere.

Conclusions:

  • Right hemispheric emotion-attention interactions are crucial for understanding brain function and dysfunction.
  • Measuring these interactions may yield novel biomarkers for brain health, aiding diagnostics and treatment optimization.
  • Future technologies could leverage right hemisphere engagement in affective-attentional processes for brain health assessment.