BROWSE

Related Researcher

Author's Photo

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

ITEM VIEW & DOWNLOAD

Adaptation of cortical activity to sustained pressure stimulation on the fingertip

Cited 0 times inthomson ciCited 0 times inthomson ci
Title
Adaptation of cortical activity to sustained pressure stimulation on the fingertip
Author
Kim, Sung-PhilChung, Yoon GiHan, Sang WooKim, Hyung-SikChung, Soon-CheolPark, Jang-YeonWallraven, Christian
Issue Date
2015-10
Publisher
BIOMED CENTRAL LTD
Citation
BMC NEUROSCIENCE, v.16, pp.71
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.
URI
https://scholarworks.unist.ac.kr/handle/201301/17711
URL
http://www.biomedcentral.com/1471-2202/16/71
DOI
10.1186/s12868-015-0207-x
ISSN
1471-2202
Appears in Collections:
BME_Journal Papers
Files in This Item:
s12868-015-0207-x.pdf Download

find_unist can give you direct access to the published full text of this article. (UNISTARs only)

Show full item record

qrcode

  • mendeley

    citeulike

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

MENU