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Slow brain potentials, imagery and hemispheric differences.

N Birbaumer1, P J Lang, E Cook

  • 1Pennsylvania State University, Department of Psychology, University Park.

The International Journal of Neuroscience
|March 1, 1988
PubMed
Summary
This summary is machine-generated.

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This study explored the link between slow cortical potentials and emotional imagery. While brain self-regulation abilities correlated with imagery vividness, direct links between slow cortical potentials and imagery were not consistently found.

Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Psychophysiology

Background:

  • Lang's (1979) theory of emotional imagery posits a connection between imagery and preparatory cortical activity.
  • A model of slow cortical potentials (SP) function suggests imagery ability relates to the capacity for on-demand cortical network regulation.

Purpose of the Study:

  • To investigate the relationship between slow cortical potentials (SP) and emotional imagery.
  • To test if imagery ability correlates with the capacity to generate and suppress preparatory cortical activity.
  • To examine the influence of SP self-regulation and imagery on physiological and subjective measures.

Main Methods:

  • Experiment I: Instrumental learning paradigm to train subjects in right- vs. left-hemispheric SP-differentiation.

Related Experiment Videos

  • Experiment II: Investigated the effect of imagined movements on SP-self-regulation and EMG differentiation.
  • Experiment III: Assessed the impact of SP-biofeedback training on the vividness of emotional imagery and autonomic responses.

    • Main Results:

    • Success in SP-regulation task correlated significantly with vivid imagery capacity (QMI).
    • Imagery influenced hand EMG differentiation but not cortical SP-differentiation.
    • Emotional imagery affected autonomic variables (HR, SCR), but SP-amplitude/polarity did not influence perceived vividness or arousal.

    Conclusions:

    • Slow cortical potentials may not be the primary neural correlate of imagery's efferent component, or dual-tasking obscured findings.
    • Imagery ability as a trait is positively related to brain self-regulation capabilities.
    • Further research is needed to clarify the precise role of SPs in emotional imagery.