TITLE

DISPLAYING SEMANTIC CATEGORIES IN BRAIN ELECTRICAL ACTIVITY

AUTHOR(S)
DANILOVA, N. N.; USHAKOVA, T. N.; VOLKOV, G. V.; PLIGINA, A. M.; STRABYKINA, E. A.
PUB. DATE
October 2013
SOURCE
Experimental Psychology;2013, Issue 4, p5
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The interaction of the cortex and subcortical brain structures is the key to understanding the brain mechanisms of semantic categorization. However, the role of oscillatory brain activity providing this communication is understood poorly. Here, we investigated the interaction of human brain structures during tasks imposed on the categorization of visual presented words belonging to two domains: «animals» and «objects». For this aim the author's method - «Microstructural analysis of oscillatory brain activity» was used. This method localizes dipole sources of activated frequency-selective generators in brain structures. We show the difference in the processes of categorization for domains «animals» and «objects». The recognition of the animals category was performed more effectively with shorter latency for motor response, and caused the greater activity of frequency-selective theta generators in the temporal lobe (Fusiform G.), in extraoccipital cortex (Lingual G., Broadman area 19) and in the thalamus anterior nucleus (AN) in the comparison with the identification of the objects category. The anticipation of the semantic category was found for visually presented words. Enhancing the theta generators activity and decreased activity of alpha generators appeared before word presentations - the names of the objects indicating additional activation of memory and attention processes.
ACCESSION #
94739657

 

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