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Communication Dans Un Congrès Année : 2016

Combining EEG source connectivity and network similarity: Application to object categorization in the human brain

Résumé

A major challenge in cognitive neuroscience is to evaluate the ability of the human brain to categorize or group visual stimuli based on common features. This categorization process is very fast and occurs in few hundreds of millisecond time scale. However, an accurate tracking of the spatiotemporal dynamics of largescale brain networks is still an unsolved issue. Here, we show the combination of recently developed method called ‘dense-EEG source connectivity' to identify functional brain networks with excellent temporal and spatial resolutions and an algorithm, called SimNet, to compute brain networks similarity. Two categories of visual stimuli were analysed in this study: immobile and mobile. Networks similarity was assessed within each category (intra-condition) and between categories (inter-condition). Results showed high similarity within each category and low similarity between the two categories. A significant difference between similarities computed in the intra and inter-conditions was observed at the period of 120-190ms supposed to be related to visual recognition and memory access. We speculate that these observations will be very helpful toward understanding the object categorization in the human brain from a network perspective.

Dates et versions

hal-01375775 , version 1 (03-10-2016)

Identifiants

Citer

Ahmad Mheich, Mahmoud Hassan, Olivier Dufor, Mohamad Khalil, Fabrice Wendling. Combining EEG source connectivity and network similarity: Application to object categorization in the human brain. SSP 2016 : IEEE Workshop on Statistical Signal Processing, Jun 2016, Palma De Mallorca, Spain. pp.326 - 330. ⟨hal-01375775⟩
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