Image-based object recognition in man, monkey and machine
Object recognition in man, monkey, and machine
Neuronal Synchronization and Selective Color Processing in the Human Brain
Journal of Cognitive Neuroscience
A Cortical Mechanism for Triggering Top-Down Facilitation in Visual Object Recognition
Journal of Cognitive Neuroscience
Time Course of Processes and Representations Supporting Visual Object Identification and Memory
Journal of Cognitive Neuroscience
Induced gamma-band activity elicited by visual representation of unattended objects
Journal of Cognitive Neuroscience
Classification of primitive shapes using brain-computer interfaces
Computer-Aided Design
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Neural mechanisms of object recognition seem to rely on activity of distributed neural assemblies coordinated by synchronous firing in the gamma-band range (20 Hz). In the present electroencephalogram (EEG) study, we investigated induced gamma band activity during the naming of line drawings of upright objects and objects rotated in the image plane. Such plane-rotation paradigms elicit view-dependent processing, leading to delays in recognition of disoriented objects. Our behavioral results showed reaction time delays for rotated, as opposed to upright, images. These delays were accompanied by delays in the peak latency of induced gamma band responses (GBRs), in the absence of any effects on other measures of EEG activity. The latency of the induced GBRs has thus, for the first time, been selectively modulated by an experimental manipulation that delayed recognition. This finding indicates that induced GBRs have a genuine role as neural markers of late representational processes during object recognition. In concordance with the view that object recognition is achieved through dynamic learning processes, we propose that induced gamma band activity could be one of the possible cortical markers of such dynamic object coding.