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Cooperation of different neuronal systems during hand sign recognition

Cooperation of different neuronal systems during hand sign recognition

Authors: 
A. Nakamura, B. Maess, T.R. Knoesche, T.C. Gunter, P. Bach & A.D. Friederici
Year: 
2004
Journal: 
Neuroimage
Abstract: 

Handsigns with symbolic meaning can often be utilized more successfully than words to communicate an intention; however, the underlying brain mechanisms are undefined. The present study using magnetoencephalography (MEG) demonstrates that the primary visual, mirror neuron, social recognition and object recognitionsystems are involved in handsignrecognition. MEG detected well-orchestrated multiple brain regional electrical activity among these neuronalsystems. During the assessment of the meaning ofhandsigns, the inferior parietal, superior temporal sulcus (STS) and inferior occipitotemporal regions were simultaneously activated. These three regions showed similar time courses in their electrical activity, suggesting that they work together duringhandsignrecognition by integrating information in the ventral and dorsal pathways through the STS. The results also demonstrated marked right hemispheric predominance, suggesting that hand expression is processed in a manner similar to that in which social signs, such as facial expressions, are processed.

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