A functional-magnetic-resonance-imaging investigation of cortical activation from moving vibrotactile stimuli on the fingertip
A functional-magnetic-resonance-imaging investigation of cortical activation from moving vibrotactile stimuli on the fingertip
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DOI：
10.1121/1.3056399
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发表时间：
2009-02-01
影响因子：
2.4
通讯作者：
Clemence, Matthew
中科院分区：
文献类型：
--
作者：
Summers, Ian R.;Francis, Susan T.;Clemence, Matthew
在功能磁共振成像过程中，使用指尖上的100元件触觉刺激器，识别出被移动的振动触觉刺激（在指尖上拖动移动线的感觉）选择性激活的大脑区域。激活模式引起的触觉运动，对比一个相当的固定的刺激，在六个人类受试者与移动的视觉刺激所产生的，对比一个相当的固定的刺激。结果提供了进一步的证据，在人类的神经解剖学收敛的运动处理和视觉运动处理。这种收敛的网站被发现躺在中颞叶复合体（hMT+/V5），一个区域与已知的专业化视觉运动处理，并在顶内区的后顶叶皮层。在以前的研究的进步，本研究包括单独划定的激活移动触觉刺激和激活移动视觉刺激。结果表明，这两套激活不完全并置。与视觉运动激活相比，视觉运动激活更靠近大脑中线，并进一步位于上级。(C)2009年，美国声学学会。[DOI：10.1121/1.3056399]
Using a 100-element tactile stimulator on the fingertip during functional-magnetic-resonance imaging, brain areas were identified that were selectively activated by a moving vibrotactile stimulus (the sensation of a moving line being dragged over the fingertip). Activation patterns elicited by tactile motion, contrasted to an equivalent stationary stimulus, were compared in six human subjects with those generated by a moving visual stimulus, contrasted to an equivalent stationary stimulus. Results provide further evidence for a neuroanatomical convergence of tactile-motion processing and visual-motion processing in humans. The sites of this convergence are found to lie in the middle temporal complex (hMT+/V5), an area with known specialization for visual-motion processing, and in the intraparietal area of the posterior parietal cortex. In an advance on previous studies, the present study includes separate delineation of activations for moving tactile stimuli and activations for moving visual stimuli. Results suggest that the two sets of activations are not entirely collocated. Compared to the visual-motion activations, the tactile-motion activations are found to lie nearer the midline of the brain and further superior. (C) 2009 Acoustical Society of America. [DOI: 10.1121/1.3056399]