Early evoked gamma-band responses and phase synchronization elicited by target categorical visual object discrimination
نویسندگان
چکیده
منابع مشابه
Visual Awareness, Emotion, and Gamma Band Synchronization
What makes us become aware? A popular hypothesis is that if cortical neurons fire in synchrony at a certain frequency band (gamma), we become aware of what they are representing. We tested this hypothesis adopting brain-imaging techniques with good spatiotemporal resolution and frequency-specific information. Specifically, we examined the degree to which increases in event-related synchronizati...
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Explaining the emergence of a coherent conscious percept and an intentional agent from the activity of distributed neurons is key to understanding how the brain produces higher cognitive processes. Gamma-band synchronization has been proposed to be a mechanism for the functional integration of neural populations that together form a transitory, large-scale, task- and/or percept-specific network...
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L. Angelini, 2, 3 M. De Tommaso, 4 M. Guido, K. Hu, 6 P. Ch. Ivanov, 6 D. Marinazzo, G. Nardulli, 2, 3 L. Nitti, 7, 3 M. Pellicoro, 2, 3 C. Pierro, and S. Stramaglia 2, 3 TIRES: Center of Innovative Technologies for Signal Detection and Processing, University of Bari, Italy Physics Department, University of Bari, Italy Istituto Nazionale di Fisica Nucleare, Sezione di Bari Department of Neurolo...
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When a sensory stimulus repeats, neuronal firing rate and functional MRI blood oxygen level-dependent responses typically decline, yet perception and behavioral performance either stay constant or improve. An additional aspect of neuronal activity is neuronal synchronization, which can enhance the impact of neurons onto their postsynaptic targets independent of neuronal firing rates. We show th...
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We investigated the early evoked gamma frequency band activity in alcoholics (n=122) and normal controls (n=72) during a visual oddball task. A time-frequency representation method was applied to EEG data in order to obtain phase-locked gamma band activity (29-45 Hz) and was analyzed within a 0-150 ms time window range. Significant reduction of the gamma band response in the frontal region duri...
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ژورنال
عنوان ژورنال: Frontiers in Human Neuroscience
سال: 2008
ISSN: 1662-5161
DOI: 10.3389/conf.neuro.09.2009.01.113