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A dual role of prestimulus spontaneous neural activity in visual object recognition.
Podvalny, Ella; Flounders, Matthew W; King, Leana E; Holroyd, Tom; He, Biyu J.
Afiliación
  • Podvalny E; Neuroscience Institute, New York University School of Medicine, New York, NY, 10016, USA. ellapodvalny@gmail.com.
  • Flounders MW; Neuroscience Institute, New York University School of Medicine, New York, NY, 10016, USA.
  • King LE; Neuroscience Institute, New York University School of Medicine, New York, NY, 10016, USA.
  • Holroyd T; Magnetoencephalography Core Facility, National Institute of Mental Health, Bethesda, MD, 20892, USA.
  • He BJ; Neuroscience Institute, New York University School of Medicine, New York, NY, 10016, USA. biyu.jade.he@gmail.com.
Nat Commun ; 10(1): 3910, 2019 09 02.
Article en En | MEDLINE | ID: mdl-31477706
Vision relies on both specific knowledge of visual attributes, such as object categories, and general brain states, such as those reflecting arousal. We hypothesized that these phenomena independently influence recognition of forthcoming stimuli through distinct processes reflected in spontaneous neural activity. Here, we recorded magnetoencephalographic (MEG) activity in participants (N = 24) who viewed images of objects presented at recognition threshold. Using multivariate analysis applied to sensor-level activity patterns recorded before stimulus presentation, we identified two neural processes influencing subsequent subjective recognition: a general process, which disregards stimulus category and correlates with pupil size, and a specific process, which facilitates category-specific recognition. The two processes are doubly-dissociable: the general process correlates with changes in criterion but not in sensitivity, whereas the specific process correlates with changes in sensitivity but not in criterion. Our findings reveal distinct mechanisms of how spontaneous neural activity influences perception and provide a framework to integrate previous findings.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Reconocimiento Visual de Modelos / Visión Ocular / Corteza Visual / Percepción Visual Tipo de estudio: Prognostic_studies Límite: Adult / Female / Humans / Male Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2019 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Reino Unido
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Reconocimiento Visual de Modelos / Visión Ocular / Corteza Visual / Percepción Visual Tipo de estudio: Prognostic_studies Límite: Adult / Female / Humans / Male Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2019 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Reino Unido