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Neurophysiological evidence for crossmodal (face-name) person-identity representation in the human left ventral temporal cortex.
Volfart, Angélique; Jonas, Jacques; Maillard, Louis; Colnat-Coulbois, Sophie; Rossion, Bruno.
Afiliação
  • Volfart A; Université de Lorraine, CNRS, CRAN, Nancy, France.
  • Jonas J; Université Catholique de Louvain, Institute of Research in Psychological Science, Institute of Neuroscience, Louvain-La-Neuve, Belgium.
  • Maillard L; Université de Lorraine, CNRS, CRAN, Nancy, France.
  • Colnat-Coulbois S; Université de Lorraine, CHRU-Nancy, Service de Neurologie, Nancy, France.
  • Rossion B; Université de Lorraine, CNRS, CRAN, Nancy, France.
PLoS Biol ; 18(4): e3000659, 2020 04.
Article em En | MEDLINE | ID: mdl-32243450
Putting a name to a face is a highly common activity in our daily life that greatly enriches social interactions. Although this specific person-identity association becomes automatic with learning, it remains difficult and can easily be disrupted in normal circumstances or neurological conditions. To shed light on the neural basis of this important and yet poorly understood association between different input modalities in the human brain, we designed a crossmodal frequency-tagging paradigm coupled to brain activity recording via scalp and intracerebral electroencephalography. In Experiment 1, 12 participants were presented with variable pictures of faces and written names of a single famous identity at a 4-Hz frequency rate while performing an orthogonal task. Every 7 items, another famous identity appeared, either as a face or a name. Robust electrophysiological responses were found exactly at the frequency of identity change (i.e., 4 Hz / 7 = 0.571 Hz), suggesting a crossmodal neural response to person identity. In Experiment 2 with twenty participants, two control conditions with periodic changes of identity for faces or names only were added to estimate the contribution of unimodal neural activity to the putative crossmodal face-name responses. About 30% of the response occurring at the frequency of crossmodal identity change over the left occipito-temporal cortex could not be accounted for by the linear sum of unimodal responses. Finally, intracerebral recordings in the left ventral anterior temporal lobe (ATL) in 7 epileptic patients tested with this paradigm revealed a small number of "pure" crossmodal responses, i.e., with no response to changes of identity for faces or names only. Altogether, these observations provide evidence for integration of verbal and nonverbal person identity-specific information in the human brain, highlighting the contribution of the left ventral ATL in the automatic retrieval of face-name identity associations.
Assuntos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Reconhecimento Visual de Modelos / Lobo Temporal Tipo de estudo: Prognostic_studies Limite: Adult / Female / Humans / Male Idioma: En Ano de publicação: 2020 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Reconhecimento Visual de Modelos / Lobo Temporal Tipo de estudo: Prognostic_studies Limite: Adult / Female / Humans / Male Idioma: En Ano de publicação: 2020 Tipo de documento: Article