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<p>The contribution of the anterior fusiform gyrus (AntFG) in human face identity recognition (FIR) has been largely neglected, mainly due to a large signal dropout in functional magnetic resonance imaging (fMRI) affecting this region. Here, we report two cases in which direct electrical stimulation of the right face-selective AntFG induced transient FIR impairment. Upon stimulation in this region, patients were unable to select a photograph of a famous face among 3 exemplars, reporting that all the faces looked the same. Most interestingly, they also failed at matching concurrently presented pictures of unfamiliar faces against a distractor face, with all face identities once again perceived as identical. Together with large electrophysiological signals of unfamiliar face identity individuation recorded in the stimulated sites, these observations support a critical role of the right AntFG, together with connected contralateral and posterior face-selective regions, in extracting idiosyncratic facial features independently of long-term familiarity.</p>

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The critical role of the right anterior fusiform gyrus in unfamiliar face identity discrimination

  • 期刊论文

  • 发表日期：

    2026年6月3日

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  • Luna Angelini,
  • Marie-Alphée Laurent,
  • Sophie Colnat-Coulbois,
  • Bruno Rossion,
  • Jacques Jonas

摘要

The contribution of the anterior fusiform gyrus (AntFG) in human face identity recognition (FIR) has been largely neglected, mainly due to a large signal dropout in functional magnetic resonance imaging (fMRI) affecting this region. Here, we report two cases in which direct electrical stimulation of the right face-selective AntFG induced transient FIR impairment. Upon stimulation in this region, patients were unable to select a photograph of a famous face among 3 exemplars, reporting that all the faces looked the same. Most interestingly, they also failed at matching concurrently presented pictures of unfamiliar faces against a distractor face, with all face identities once again perceived as identical. Together with large electrophysiological signals of unfamiliar face identity individuation recorded in the stimulated sites, these observations support a critical role of the right AntFG, together with connected contralateral and posterior face-selective regions, in extracting idiosyncratic facial features independently of long-term familiarity.