Slow evoked cortical responses to linear frequency ramps of a continuous pure tone.
Slow evoked cortical responses to linear frequency ramps of a continuous pure tone.
复制标题
缓慢诱发皮层对连续纯音线性频率斜坡的反应。
DOI：
10.1111/j.1748-1716.1976.tb10330.x
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发表时间：
1976
期刊：
影响因子：
--
通讯作者：
E. Holmgren
中科院分区：
文献类型：
--
作者：
S. Arlinger;L. Jerlvall;T. Åhrén;E. Holmgren
10名听力正常的年轻受试者的慢诱发皮层电位被记录为对连续纯音的线性频率斜坡的反应。频率变化范围为10~500 Hz，频率变化率为0.02~50 kHz/S，变化时间为10~500ms。除频率斜波持续时间低于50ms和频率变化低于50赫兹外，频率变化率对响应的影响最大。基频(250-4000 Hz)和声级(20-80dBHL)对诱发反应的影响与它们对行为阈值的影响在性质上是相似的。扫频方向对诱发反应无显著影响。提出了一种函数模型，其中信号频率的时间导数与由频率变化率控制的自适应积分时间积分。
Slow evoked cortical potentials from ten young normal-hearing subjects have been recorded as responses to linear frequency ramps of a continuous pure tone. Frequency changes from 10 to 500 Hz were studied; the rate of frequency change was varied from 0.02 to 50 kHz/s while the duration of the change was varied from 10 to 500 ms. The rate of frequency change was shown to have the greatest bearing on the responses except for frequency ramp durations below 50 ms and frequency changes below 50 Hz. The base frequencies (250-4000 Hz) and sound levels (20-80 dB HL) exerted an influence on the evoked responses that was qualitatively similar to their influence on behavioral thresholds. The direction of the frequency sweep had no significant influence on the evoked responses. A functional model is proposed in which the time derivate of the signal frequency is integrated with an adaptable integration time that is controlled by the rate of the frequency change.