THE RELATIONSHIP BETWEEN PSYCHOPHYSICAL AND ELECTROPHYSIOLOGICAL MEASURES OF TEM

该子项目是利用NIH/NCRR资助的中心赠款提供的资源的许多研究子项目之一。子项目和研究者（PI）可能从另一个NIH来源获得了主要资金，因此可以在其他CRISP条目中表示。所列机构为中心，不一定是研究者所在机构。该项目的总体目标是研究心理物理和电生理之间的关系（即，皮质）测量的时间间隙检测的年轻人与正常的听力;儿童和老年人与正常的听力;和个人与已知的中枢神经系统病变和神经系统为基础的学习障碍。快速时间处理在语音和音乐的感知以及声音定位中至关重要。先前的研究表明，婴儿和老年人的心理物理差距阈值比年轻人差，电生理差距检测措施可能会显示年龄特异性差异，而不是心理物理任务。此外，有人提出，使用宽带刺激获得的间隙阈值仅反映高频纤维的神经活动。它已被证明在精神心理学和电生理学，间隙阈值是频率依赖性时，使用特定的频率刺激。两者合计，时间间隙检测能力的神经模式可能会有所不同的寿命和特定频率的时间处理措施可能会照亮特定频率的听觉处理障碍。本研究旨在汇集这些研究的交叉点，以探讨时间听觉处理的心理物理和电生理测量之间的关系。

This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. The subproject and investigator (PI) may have received primary funding from another NIH source, and thus could be represented in other CRISP entries. The institution listed is for the Center, which is not necessarily the institution for the investigator. The overall aim of this project is to examine the relationship between psychophysical and electrophysiological (i.e., cortical) measures of temporal gap detection in young adults with normal hearing; in children and elderly adults with normal hearing; and in individuals with known CNS lesions and auditory-based learning disorders. Rapid temporal processing is critically important in perception of speech and music, as well as in sound localization. Previous research has demonstrated that psychophysical gap thresholds in infants and elderly adults are poorer than in young adults, and that electrophysiological gap detection measures may show age-specific differences not illuminated with psychophysical tasks. Furthermore, it has been suggested that gap thresholds obtained using broadband stimuli reflects only neural activity of high frequency fibers. It has been demonstrated both psychophysically and electrophysiologically that gap thresholds are frequency-dependent when using frequency-specific stimuli. Taken together, the neural patterns for temporal gap detection abilities may differ across the lifespan and that frequency-specific measures of temporal processing may illuminate frequency-specific auditory processing disorders. This study is proposed to bring together these converging lines of research to examine the relationship between psychophysical and electrophysiological measures of temporal auditory processing.