File:Development-of-grouped-icEEG-for-the-study-of-cognitive-processing-Video1.ogv

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Original file(Ogg multiplexed audio/video file, Theora/Vorbis, length 30 s, 1,799 × 754 pixels, 1.74 Mbps overall, file size: 6.22 MB)

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English: Intracranial recordings provide unparalleled insights into rapidly evolving patterns of cortical activity across distributed neural substrates. Electrocorticographic movies of grouped percent change in high-frequency broadband gamma activity (BGA; 60–120 Hz; n = 27 subject) during a face and place-naming task are visualized on the N27 cortical surface model. Hotter colors denote an increase in mid-gamma band power, while cooler colors denote a decrease (color-scale ranges from −50 to 50% change). The movie begins 100 ms before stimulus onset and continues until 700 ms after stimulus onset, in 5 ms steps (stimulus onset at 0 ms). Notably, for face stimuli (left surface) increases in BGA are localized to the lateral aspect of the mid-fusiform sulcus. In contrast, place stimuli produce more widespread activations in the medial aspects of the fusiform gyrus.
Français : Les enregistrements intracrâniens fournissent des aperçus inégalés des modèles d'activité corticale évoluant rapidement dans les réseaux neuraux distribués. L'image électrocorticographique montre ici les changement d'activité exprimés en pourcentage d'activité gamma à large bande à haute fréquence (BGA, 60-120 Hz) à partir de 27 sujets) pour une tâche consistant à reconnaitre un visage ; Les couleurs chaudes montrent une augmentation d'activité dans la bande gamma moyenne, les couleurs froides traduisent une diminution d'activité (l'échelle des couleurs varie de -50 à + 50%). Le film commence 100 ms avant le début du stimulus et se poursuit jusqu'à 700 ms après le début du stimulus, par pas de 5 ms (début du stimulus à 0 ms). Notamment, pour les stimuli du visage (surface gauche), les augmentations de BGA sont localisées à l'aspect latéral du sulcus mi-fusiforme. En revanche, les stimuli de la photo d'un monument (tour eiffel) produisent des activations plus étendues dans les aspects médiaux du gyrus fusiforme
Date
Source Movie 1 from Kadipasaoglu C, Forseth K, Whaley M, Conner C, Rollo M, Baboyan V, Tandon N (2015). "Development of grouped icEEG for the study of cognitive processing". Frontiers in Psychology. DOI:10.3389/fpsyg.2015.01008. PMID 26257673. PMC: 4508923.
Author Kadipasaoglu C, Forseth K, Whaley M, Conner C, Rollo M, Baboyan V, Tandon N
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21 July 2015

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current22:22, 12 August 201530 s, 1,799 × 754 (6.22 MB)Open Access Media Importer BotAutomatically uploaded media file from Open Access source. Please report problems or suggestions here.
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