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<p>Repeatedly processing an object leads to subsequent behavioral improvements in its identification and reductions in associated neural activity, a form of neural processing efficiency that multiple theoretical models have attempted to explain. Using simultaneous EEG/fMRI in humans during object naming, we find that stimulus-driven oscillatory power from high (gamma) to low frequencies (theta) increases and resolves earlier with repetition in task-engaged frontal and occipitotemporal brain regions identified as showing repetition suppression in fMRI. Repetition-related increases and decreases in gamma oscillatory power in these regions were correlated with behavioral priming across subjects (|<i>r</i>s| ≥ 0.39) and additionally with fMRI repetition suppression in left frontal cortex (<i>r</i> = -0.37). Similar correlations were observed between behavioral priming and oscillatory power changes when effects were examined within subjects (|<i>r</i>s| ≥ 0.34). Collectively, these data provide multimodal support for a novel mixture of the previously proposed Synchrony and Facilitation models.</p>

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Repetition-related reductions in neural activity support improved behavior through increases in oscillatory power

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年7月21日

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  • Adrian W. Gilmore,
  • Leonardo Claudino,
  • Cassandra M. Levesque,
  • Anna M. Agron,
  • Peter J. Molfese,
  • Vinai Roopchansingh,
  • Michael D. Rugg,
  • Stephen J. Gotts,
  • Alex Martin

摘要

Repeatedly processing an object leads to subsequent behavioral improvements in its identification and reductions in associated neural activity, a form of neural processing efficiency that multiple theoretical models have attempted to explain. Using simultaneous EEG/fMRI in humans during object naming, we find that stimulus-driven oscillatory power from high (gamma) to low frequencies (theta) increases and resolves earlier with repetition in task-engaged frontal and occipitotemporal brain regions identified as showing repetition suppression in fMRI. Repetition-related increases and decreases in gamma oscillatory power in these regions were correlated with behavioral priming across subjects (|rs| ≥ 0.39) and additionally with fMRI repetition suppression in left frontal cortex (r = -0.37). Similar correlations were observed between behavioral priming and oscillatory power changes when effects were examined within subjects (|rs| ≥ 0.34). Collectively, these data provide multimodal support for a novel mixture of the previously proposed Synchrony and Facilitation models.