NDLI: Functional specialization of hemispheres in matching current and preceding stimuli

Content Provider	Springer Nature Link
Author	Beteleva, T. G.
Copyright Year	2000
Abstract	Classification of visual patterns, a differentiating sign of which is the position of the longer axis of an oval and the principal part of the image, was studied. Stimuli were presented at random to the left (LVF) or right (RVF) visual fields in two situations:same (preceding imageS 1 was of the same form and presented to the same visual field as the current imageS 2) anddifferent (S 1 differed fromS 2 by both form and location). Classification ofdifferent images was less effective compared with that ofsame images during stimulation of LVF and showed no dependence on the preceding image during stimulation of RVF. The matching of event-related potentials (ERP) in response toS 2 and differential curvesS 2−S 1 revealed the processes related to accessing the information on the preceding stimulus and processing of the current stimulus, which simultaneously occur during the initial 50 ms in both hemispheres and in the 160–180 ms interval in the right hemisphere. Both processes were more expressed during stimulation of the contralateral visual field. In the 190–310 ms interval, discrimination of thesame anddifferent images was determined by processing of information about the current stimulus on the basis of the results of the preceding stage of analysis. This process was more expressed in the occipital, parietal and temporoparietooccipital regions of the right hemisphere independently of the stimulated visual field. The involvement of frontal regions at this stage of information processing was observed only at stimulation of RVF. The dependence of differences of ERP to thesame anddifferent images on the stimulated visual field was revealed for the 320–500-ms interval (N 400 and late positive complex) in the occipital regions.
Starting Page	265
Ending Page	274
Page Count	10
File Format	PDF
ISSN	03621197
Journal	Human Physiology
Volume Number	26
Issue Number	3
e-ISSN	16083164
Language	English
Publisher	Nauka/Interperiodica
Publisher Date	2000-01-01
Publisher Place	Moscow
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Life Sciences Human Physiology Biomedicine general
Content Type	Text
Resource Type	Article
Subject	Physiology Physiology (medical)

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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