Title |
Intra- and inter-hemispheric effective connectivity in the human somatosensory cortex during pressure stimulation
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Published in |
BMC Neuroscience, March 2014
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DOI | 10.1186/1471-2202-15-43 |
Pubmed ID | |
Authors |
Yoon Gi Chung, Sang Woo Han, Hyung-Sik Kim, Soon-Cheol Chung, Jang-Yeon Park, Christian Wallraven, Sung-Phil Kim |
Abstract |
Slow-adapting type I (SA-I) afferents deliver sensory signals to the somatosensory cortex during low-frequency (or static) mechanical stimulation. It has been reported that the somatosensory projection from SA-I afferents is effective and reliable for object grasping and manipulation. Despite a large number of neuroimaging studies on cortical activation responding to tactile stimuli mediated by SA-I afferents, how sensory information of such tactile stimuli flows over the somatosensory cortex remains poorly understood. In this study, we investigated tactile information processing of pressure stimuli between the primary (SI) and secondary (SII) somatosensory cortices by measuring effective connectivity using dynamic causal modeling (DCM). We applied pressure stimuli for 3 s to the right index fingertip of healthy participants and acquired functional magnetic resonance imaging (fMRI) data using a 3T MRI system. |
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