...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Experimental Brain Research >The saltation illusion demonstrates integrative processing of spatiotemporal information in thermoceptive and nociceptive networks
【24h】

The saltation illusion demonstrates integrative processing of spatiotemporal information in thermoceptive and nociceptive networks

机译：盐化错觉表明在热感受和伤害感受网络中时空信息的整合处理

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In sensory saltation, first reported by Geldard and Sherrick (Science 178:178–179, 1972), a stimulus is displaced towards a second one following closely in time and space as a function of the delay between the stimuli. The distance between stimulus locations is restricted by the extension of sensory fields in the primary somatosensory cortex. Saltation is assumed to reflect dynamic changes in these cortical representations. The present study demonstrates for the first time saltation in thermoceptive and nociceptive pathways with CO2 laser stimulation. Stimuli were presented to the dorsal forearms of 18 healthy subjects at two intensities. Saltation patterns consisted of a reference stimulus S0 near the wrist, the first test stimulus S1 at the reference location after a fixed onset delay of 1,000 ms, and a second test stimulus S2 at a location 105 mm distant from reference after a variable onset delay of 60–516 ms. Perceived positions were indicated by the subjects without skin contact with a 3D tracker. As expected, subjects mislocalized S1 towards S2. Mean S1 displacement was 51±36 mm. Decreasing delays between S1 and S2 resulted in increasing displacements, independent of intensity. However, since no clear-cut discrimination of thermal versus nociceptive activation could be achieved definite conclusions about differences between the two modalities cannot be drawn. In addition, effects of body site on the saltation characteristics were observed. The saltation paradigm constitutes a promising approach to the functional analysis of spatiotemporal dynamics in thermoceptive and nociceptive networks to supplement brain-mapping approaches to cortical sensory fields.
机译：在感官盐化中，首先由Geldard和Sherrick报道（科学178：178–179，1972），刺激随时间和空间的变化而紧随刺激之间的延迟而向第二刺激转移。刺激位置之间的距离受到主要体感皮层中感官区域的扩展的限制。盐化被认为反映了这些皮层表现的动态变化。本研究首次证明了CO2 激光刺激在热感受和伤害感受途径中的盐化作用。在两个强度下对18位健康受试者的前臂进行刺激。盐化模式包括手腕附近的参考刺激S0，在1000 ms的固定起始延迟后在参考位置的第一测试刺激S1和在可变起始延迟为1000ms后与参考相距105 mm的第二测试刺激S2。 60–516毫秒。受试者在没有皮肤接触3D跟踪器的情况下指示了感知位置。如预期的那样，受试者将S1误定位为S2。 S1平均位移为51±36 mm。 S1和S2之间的延迟减少导致位移增加，而与强度无关。但是，由于无法实现对热激活和伤害感受激活的明确区分，因此无法得出关于两种方式之间差异的明确结论。另外，观察到身体部位对盐分特性的影响。盐化范式构成了一种在热感受和伤害感受网络中时空动力学功能分析的有前途的方法，以补充皮层感觉区域的脑映射方法。

著录项

  • 来源
    《Experimental Brain Research》 |2006年第1期|88-96|共9页
  • 作者

    Jörg Trojan; Annette M. Stolle; Dieter Kleinböhl; Carsten D. Mørch; Lars Arendt-Nielsen; Rupert Hölzl;

  • 作者单位

    Laboratory for Clinical Psychophysiology Otto Selz Institute for Psychology and Educational Science University of MannheimCenter for Sensory-Motor Interaction (SMI) Aalborg University;

    Laboratory for Clinical Psychophysiology Otto Selz Institute for Psychology and Educational Science University of MannheimDepartment Neuropsychology Central Institute for Mental Health;

    Laboratory for Clinical Psychophysiology Otto Selz Institute for Psychology and Educational Science University of Mannheim;

    Center for Sensory-Motor Interaction (SMI) Aalborg University;

    Center for Sensory-Motor Interaction (SMI) Aalborg University;

    Laboratory for Clinical Psychophysiology Otto Selz Institute for Psychology and Educational Science University of Mannheim;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Psychophysics; Perception; Illusion; Lasers; Human;

    机译：心理物理学;知觉;幻觉;激光;人类;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号