Cortical Processing Related to Intensity of a Modulated Noise Stimulus-a Functional Near-Infrared Study.
Cortical Processing Related to Intensity of a Modulated Noise Stimulus-a Functional Near-Infrared Study.
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DOI：
10.1007/s10162-018-0661-0
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发表时间：
2018-06
期刊：
影响因子：
--
通讯作者：
McKay C
中科院分区：
文献类型：
--
作者：
Weder S;Zhou X;Shoushtarian M;Innes-Brown H;McKay C
声音强度是听觉信号的一个关键特征。因此，对这一特征的皮层处理的深刻理解是非常可取的。本研究探讨是否皮质功能近红外光谱（fNIRS）信号反映声音强度的变化，以及在大脑皮层上的最大强度依赖性激活位于。fNIRS技术特别适用于这种听力研究，因为它运行安静。23名听力正常的受试者被纳入并积极参与了平衡块设计任务。四个强度水平的调制噪声刺激与长期频谱和调制特性类似的语音，均匀间隔15至90分贝SPL。来自听觉处理皮层场的信号来自头部两侧各16个光电点的蒙太奇。结果表明，fNIRS反应起源于听觉处理区是高度依赖于声音强度水平：较高的刺激水平导致较高的浓度变化。尾侧和喙侧通道表现出不同的波形形态，反映了特定的皮层信号处理的刺激。通道覆盖的缘上和尾侧上级颞回引起的相位反应，而在布罗卡区的渠道表现出广泛的紧张模式。该数据集可以作为未来听觉fNIRS研究的基础，以开发该技术作为正常听力和听力受损人群的听力评估工具。
Sound intensity is a key feature of auditory signals. A profound understanding of cortical processing of this feature is therefore highly desirable. This study investigates whether cortical functional near-infrared spectroscopy (fNIRS) signals reflect sound intensity changes and where on the brain cortex maximal intensity-dependent activations are located. The fNIRS technique is particularly suitable for this kind of hearing study, as it runs silently. Twenty-three normal hearing subjects were included and actively participated in a counterbalanced block design task. Four intensity levels of a modulated noise stimulus with long-term spectrum and modulation characteristics similar to speech were applied, evenly spaced from 15 to 90 dB SPL. Signals from auditory processing cortical fields were derived from a montage of 16 optodes on each side of the head. Results showed that fNIRS responses originating from auditory processing areas are highly dependent on sound intensity level: higher stimulation levels led to higher concentration changes. Caudal and rostral channels showed different waveform morphologies, reflecting specific cortical signal processing of the stimulus. Channels overlying the supramarginal and caudal superior temporal gyrus evoked a phasic response, whereas channels over Broca’s area showed a broad tonic pattern. This data set can serve as a foundation for future auditory fNIRS research to develop the technique as a hearing assessment tool in the normal hearing and hearing-impaired populations.
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影响因子：
3
作者：
Gamsby JJ;Gulick D
通讯作者：
Gulick D
影响因子：
5.7
作者：
Langers, Dave R. M.;van Dijk, Pirn;Backes, Walter H.
通讯作者：
Backes, Walter H.
影响因子：
2.4
作者：
Hall, DA;Haggard, MP;Bowtell, RW
通讯作者：
Bowtell, RW
DOI：
10.1249/00005768-198205000-00012
发表时间：
1982-01-01
期刊：
MEDICINE AND SCIENCE IN SPORTS AND EXERCISE
影响因子：
--
作者：
BORG, GAV
通讯作者：
BORG, GAV
影响因子：
5.7
作者：
Huppert, TJ;Hoge, RD;Boas, DA
通讯作者：
Boas, DA