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Kim, Sung-Phil
Brain-Computer Interface (BCI) Lab
Research Interests
  • Brain-computer interface, Statistical Signal Processing, Neural Code, Neuromarketing


Adaptation of cortical activity to sustained pressure stimulation on the fingertip

DC Field Value Language Kim, Sung-Phil ko Chung, Yoon Gi ko Han, Sang Woo ko Kim, Hyung-Sik ko Chung, Soon-Cheol ko Park, Jang-Yeon ko Wallraven, Christian ko 2015-11-06T00:33:48Z - 2015-10-22 ko 2015-10 ko
dc.identifier.citation BMC NEUROSCIENCE, v.16, pp.71 ko
dc.identifier.issn 1471-2202 ko
dc.identifier.uri -
dc.description.abstract Background Tactile adaptation is a phenomenon of the sensory system that results in temporal desensitization after an exposure to sustained or repetitive tactile stimuli. Previous studies reported psychophysical and physiological adaptation where perceived intensity and mechanoreceptive afferent signals exponentially decreased during tactile adaptation. Along with these studies, we hypothesized that somatosensory cortical activity in the human brain also exponentially decreased during tactile adaptation. The present neuroimaging study specifically investigated temporal changes in the human cortical responses to sustained pressure stimuli mediated by slow-adapting type I afferents. Methods We applied pressure stimulation for up to 15 s to the right index fingertip in 21 healthy participants and acquired functional magnetic resonance imaging (fMRI) data using a 3T MRI system. We analyzed cortical responses in terms of the degrees of cortical activation and inter-regional connectivity during sustained pressure stimulation. Results Our results revealed that the degrees of activation in the contralateral primary and secondary somatosensory cortices exponentially decreased over time and that intra- and inter-hemispheric inter-regional functional connectivity over the regions associated with tactile perception also linearly decreased or increased over time, during pressure stimulation. Conclusion These results indicate that cortical activity dynamically adapts to sustained pressure stimulation mediated by SA-I afferents, involving changes in the degrees of activation on the cortical regions for tactile perception as well as in inter-regional functional connectivity among them. We speculate that these adaptive cortical activity may represent an efficient cortical processing of tactile information. ko
dc.description.statementofresponsibility open -
dc.language 영어 ko
dc.publisher BIOMED CENTRAL LTD ko
dc.title Adaptation of cortical activity to sustained pressure stimulation on the fingertip ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-84947036575 ko
dc.identifier.wosid 000363624300001 ko
dc.type.rims ART ko
dc.description.wostc 0 * 2015-12-28 *
dc.identifier.doi 10.1186/s12868-015-0207-x ko
dc.identifier.url ko
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