| Dependence of the negative BOLD response on somatosensory stimulus intensity. | |
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MedLine Citation:
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PMID: 20538064 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The primary somatosensory cortex (SI) has been shown to encode the intensity of a stimulus applied to the contralateral side of the body. Recent studies have demonstrated that ipsilateral SI is also involved in the processing of somatosensory information. In this study, we investigated the dependence of the negative BOLD response in ipsilateral SI on the intensity of somatosensory stimulation. Functional MRI was performed in 12 healthy subjects during electrical median nerve stimulation at four different intensities. A monotonic relationship between stimulus intensity and the strength of the negative BOLD response in ipsilateral SI was found. Additionally, a psychophysiological experiment revealed tight coupling between the stimulus intensity applied to one hand and increased perceptual threshold of the other hand. These findings indicate a stimulus intensity-dependent inhibition of ipsilateral SI. |
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Authors:
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Carsten M Klingner; Caroline Hasler; Stefan Brodoehl; Otto W Witte |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2010-06-09 |
Journal Detail:
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Title: NeuroImage Volume: 53 ISSN: 1095-9572 ISO Abbreviation: Neuroimage Publication Date: 2010 Oct |
Date Detail:
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Created Date: 2010-08-02 Completed Date: 2011-01-04 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9215515 Medline TA: Neuroimage Country: United States |
Other Details:
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Languages: eng Pagination: 189-95 Citation Subset: IM |
Copyright Information:
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Copyright 2010 Elsevier Inc. All rights reserved. |
Affiliation:
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Department of Neurology, University of Jena, Jena, Germany; Brain Imaging Center, University of Jena, Jena, Germany. carsten.klingner@med.uni-jena.de |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Evoked Potentials, Somatosensory / physiology* Female Humans Magnetic Resonance Imaging / methods* Male Physical Stimulation / methods* Somatosensory Cortex / physiology* Young Adult |
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