微音学
声学
医学
神经科学
声音(地理)
物理
刺激(心理学)
耳蜗
测听
电生理学
作者
Frederic G. Worden,James T. Marsh
出处
期刊:Electroencephalography and Clinical Neurophysiology
[Elsevier]
日期:1968-07-01
卷期号:25 (1): 42-52
被引量:165
标识
DOI:10.1016/0013-4694(68)90085-0
摘要
Abstract 1. 1. An acoustically evoked response is described which reproduces the frequency and wave form of the stimulus. This frequency-following response (FFR) is recordable from gross electrodes in the central auditory pathway. 2. 2. The FFR differs from an acoustic stimulus of graded onset, and the cochlear microphonic response (CM), in that it has a sharp onset, a latency appropriate to the locus from which it is recorded, an amplitude burst at the onset and a decrement of amplitude over time. 3. 3. The frequency range of FFR increases with stimulus intensity. At 80 dB sound pressure level the range is approximately 500–5000 c/sec. For recordings from the cochlear nucleus these frequency limits are not influenced by Nembutal anesthesia. 4. 4. The wave form and amplitude of FFR vary with stimulus frequency and with laterality of stimulus input. 5. 5. In contrast to the auditory evoked potential, which can be recorded widely in the brain, FFR is recordable only within, or close to, the auditory pathway. We have observed it only at, and below the level of the inferior colliculus. 6. 6. FFR has implications for the neurophysiology of hearing which are different from those of the auditory evoked potential. Some of these are discussed.
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