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Related Experiment Videos

Classic identity negative priming involves accessing semantic representations in the left anterior temporal cortex.

Greig de Zubicaray1, Katie McMahon, Mathew Eastburn

  • 1Centre for Magnetic Resonance, The University of Queensland, QLD, 4072, Australia. greig.dezubicaray@cmr.uq.edu.au

Neuroimage
|August 16, 2006
PubMed
Summary

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Negative priming (NP) occurs when ignored items are responded to slower. This study found the anterior temporal cortex is involved in NP, suggesting semantic processing plays a role in this cognitive phenomenon.

Area of Science:

  • Cognitive Neuroscience
  • Neuroimaging
  • Semantic Cognition

Background:

  • Classic identity negative priming (NP) demonstrates slower responses to previously ignored objects.
  • The role of abstract semantic representations in NP remains unclear.
  • Connectionist models implicate the anterior temporal cortex in abstract semantic knowledge.

Purpose of the Study:

  • To investigate whether abstract semantic representations are involved in the identity negative priming (NP) task.
  • To determine the neural correlates of NP, specifically examining the role of the anterior temporal cortex.

Main Methods:

  • Event-related functional magnetic resonance imaging (fMRI) at high field (4 T) was employed.
  • Participants performed a classic identity negative priming (NP) task.

Related Experiment Videos

  • Blood-oxygen-level-dependent (BOLD) responses were analyzed in relation to the NP effect.

    • Main Results:

    • Increased BOLD responses were observed in the left anterolateral temporal cortex, including the temporal pole.
    • These temporal cortex activations correlated with the magnitude of individual NP effects, supporting a semantic locus.
    • Additional signal increases were noted in the supplementary eye fields (SEF) and left inferior parietal lobule (IPL).

    Conclusions:

    • The findings support a semantic basis for the classic identity negative priming (NP) effect.
    • The left anterolateral temporal cortex, particularly the temporal pole, is implicated in semantic processing during NP.
    • The supplementary eye fields (SEF) and left inferior parietal lobule (IPL) may also contribute to NP mechanisms.