Temporal frequency in tactile roughness perception

触觉粗糙度感知中的时间频率

• 批准号: 6530046
• 负责人: Carissa J Cascio
• 金额: $ 2.39万
• 依托单位: EMORY UNIVERSITY
• 依托单位国家: 美国
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-09-01 至
• 项目状态: 未结题
• 来源: https://reporter.nih.gov/project-details/6530046
• 关键词: Macaca mulatta; behavioral /social science research tag; brain electrical activity; clinical research; dyslexia; form /pattern perception; histology; human subject; microelectrodes; neurons; neuropsychological tests; neuropsychology; psychometrics; psychophysiology; sensory discrimination; sensory mechanism; single cell analysis; somesthetic sensory cortex; surface property; time perception; touch

The tactile perception of roughness depends on lateral movement between the skin and the surface, yet studies of the stimulus variables relevant to roughness perception have failed to find substantial evidence for temporal factors. This project asks whether the temporal frequency of a textured stimulus affects roughness perception. The hypothesis that tactile roughness perception depends partially on temporal factors will be investigated using three approaches. First, normal human volunteers will perform either of two psychophysical tasks as temporal frequency is manipulated as an independent variable. Next, the representation of stimulus frequency in somatosensory cortical neurons will be investigated. Finally, numerous studies have linked dyslexia to a mufti- modal sensory deficit specific for high-frequency information. In light of this evidence, volunteers with dyslexia will perform a psychophysical discrimination task using textured stimuli of varying frequencies. This project will contribute not only to the understanding of tactile coding of texture, but also to the understanding of sensory differences in dyslexia.

粗糙度的触觉感知取决于皮肤和表面之间的横向运动，但是对与粗糙度感知相关的刺激变量的研究未能找到时间因素的大量证据。该项目询问纹理刺激的时间频率是否会影响粗糙度感知。触觉粗糙度感知部分取决于时间因素的假设将使用三种方法研究。首先，正常的人类志愿者将执行两个心理物理任务之一，因为时间频率被操纵为独立变量。接下来，将研究体感皮质神经元中刺激频率的表示。最后，许多研究将阅读障碍与高频信息特有的Mufti-Modal感觉缺陷联系起来。鉴于这一证据，阅读障碍的志愿者将使用不同频率的纹理刺激执行心理物理歧视任务。该项目不仅将有助于理解纹理的触觉编码，还将有助于理解阅读障碍的感觉差异。