Broekhuijsen M L, van Willigen J D
Department of Neurobiology and Oral Physiology, University of Groningen, The Netherlands.
Arch Oral Biol. 1994 Feb;39(2):117-20. doi: 10.1016/0003-9969(94)90106-6.
In contrast to recent reports, during an isometric short forceful bite, visual feedback had a significant influence on the force tremor spectrum. The value of a 'half-value frequency', being the frequency f1/2 at which, with increasing frequency, the amplitude of the spectrum for the first time drops to half its initial value, was used as an indicator for the spectral behavior. Under visual feedback, the amplitude contribution to the force spectrum in the 3-5 Hz frequency range was much larger than after deprivation of visual feedback. Elevations in the frequency range between 3 and 5 Hz in the force spectrum are interpreted as an expression of a visual feedback loop with a tau between 100 and 200 ms. This is supported by the visual/oral reaction times recorded, which were between 110 and 190 ms.
与最近的报道相反，在等长短暂强力咬合过程中，视觉反馈对力量震颤频谱有显著影响。“半值频率”（即随着频率增加，频谱幅度首次降至其初始值一半时的频率f1/2）的值被用作频谱行为的指标。在视觉反馈下，3 - 5Hz频率范围内对力量频谱的幅度贡献比剥夺视觉反馈后要大得多。力量频谱中3至5Hz频率范围内的升高被解释为tau在100至200毫秒之间的视觉反馈回路的一种表现。记录的视觉/口腔反应时间在110至190毫秒之间，这支持了这一点。
