Perceived frequency of vibrotactile stimuli can be divided into two distinctive cutaneous sensations - flutter (<60 Hz) and vibratory hum (>60 Hz), mediated by two different tactile afferent types (FA1 and FA2, respectively). We recently demonstrated a novel form of neural coding in the human tactile system, where frequency perception of stimulus pulses grouped into periodic bursts in the flutter range depended on the duration of the silent gap between bursts, rather than the periodicity or mean impulse rate. Here, we investigated whether this inter-burst interval could also explain the perceived frequency of electrocutaneous pulse patterns delivered at frequencies above the flutter range. At stimulus rates of 50 to 190 pulses/s, the burst gap model correctly predicted the perceived frequency. This shows that the burst gap code represents a general coding strategy which spans the range of frequencies traditionally attributed to two different tactile channels.

中文翻译：

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触觉频率的突发​​间隙代码预测在归因于两个不同触觉通道的感知频率范围内有效

振动触觉刺激的感知频率可分为两种不同的皮肤感觉 - 颤动 (<60 Hz) 和振动嗡嗡声 (>60 Hz)，由两种不同的触觉传入类型（分别为 FA1 和 FA2）介导。我们最近在人类触觉系统中展示了一种新形式的神经编码，其中刺激脉冲的频率感知在颤动范围内分组为周期性突发，取决于突发之间的无声间隙的持续时间，而不是周期性或平均脉冲率。在这里，我们研究了这种突发间隔是否也可以解释以高于颤动范围的频率传递的皮肤电脉冲模式的感知频率。在 50 到 190 脉冲/秒的刺激速率下，突发间隙模型正确预测了感知频率。