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  • Title: Epicenters of dynamic connectivity in the adaptation of the ventral visual system.
    Author: Prčkovska V, Huijbers W, Schultz A, Ortiz-Teran L, Peña-Gomez C, Villoslada P, Johnson K, Sperling R, Sepulcre J.
    Journal: Hum Brain Mapp; 2017 Apr; 38(4):1965-1976. PubMed ID: 28029725.
    Abstract:
    OBJECTIVES AND DESIGN: Neuronal responses adapt to familiar and repeated sensory stimuli. Enhanced synchrony across wide brain systems has been postulated as a potential mechanism for this adaptation phenomenon. Here, we used recently developed graph theory methods to investigate hidden connectivity features of dynamic synchrony changes during a visual repetition paradigm. Particularly, we focused on strength connectivity changes occurring at local and distant brain neighborhoods. PRINCIPAL OBSERVATIONS: We found that connectivity reorganization in visual modal cortex-such as local suppressed connectivity in primary visual areas and distant suppressed connectivity in fusiform areas-is accompanied by enhanced local and distant connectivity in higher cognitive processing areas in multimodal and association cortex. Moreover, we found a shift of the dynamic functional connections from primary-visual-fusiform to primary-multimodal/association cortex. CONCLUSIONS: These findings suggest that repetition-suppression is made possible by reorganization of functional connectivity that enables communication between low- and high-order areas. Hum Brain Mapp 38:1965-1976, 2017. © 2017 Wiley Periodicals, Inc.
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