کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6040040 | 1188833 | 2008 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Inhibitory impact of subliminal electrical finger stimulation on SI representation and perceptual sensitivity of an adjacent finger
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علم عصب شناسی
علوم اعصاب شناختی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Inhibitory impact of subliminal electrical finger stimulation on SI representation and perceptual sensitivity of an adjacent finger Inhibitory impact of subliminal electrical finger stimulation on SI representation and perceptual sensitivity of an adjacent finger](/preview/png/6040040.png)
چکیده انگلیسی
Simultaneous stimulation of two adjacent fingers above sensory perception threshold (supraliminal stimulation) leads to an inhibitory interaction effect on responses in primary somatosensory cortex (SI). Moreover, during electrical finger stimulation closely below threshold for conscious perception (subliminal stimulation) inhibitory interneurons in cortical layer 4 are assumed to be activated preferentially as compared to excitatory interneurons. Using fMRI in humans, here we show that interspersed subliminal electrical stimulation of an adjacent finger reduces the response to target finger stimulation in contralateral SI. This effect was shown in a complementary study to be associated behaviorally with a diminished detectability of test pulses on the target finger. We propose the mechanism underlying this lateral inhibitory effect to be related to a representational overlap of inhibitory interneurons in SI based on the divergence of thalamocortical feedforward projections, or to intracortical lateral inhibitory projections targeting juxtaposed receptive fields, or both.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: NeuroImage - Volume 39, Issue 3, 1 February 2008, Pages 1307-1313
Journal: NeuroImage - Volume 39, Issue 3, 1 February 2008, Pages 1307-1313
نویسندگان
Birol Taskin, Susanne Holtze, Thomas Krause, Arno Villringer,