Han Sang Woo, Chung Yoon Gi, Kim Hyung-Sik, Chung Soon-Cheol, Park Jang-Yeon, Kim Sung-Phil
Annu Int Conf IEEE Eng Med Biol Soc. 2013;2013:4402-5. doi: 10.1109/EMBC.2013.6610522.
In parallel with advances in haptic-based mobile computing systems, understanding of the neural processing of vibrotactile information becomes of great importance. In the human nervous system, two types of vibrotactile information, flutter and vibration, are delivered from mechanoreceptors to the somatosensory cortex through segregated neural afferents. To investigate how the somatosensory cortex differentiates flutter and vibration, we analyzed the cortical responses to vibrotactile stimuli with a wide range of frequencies. Specifically, we examined whether cortical activity changed most around 50 Hz, which is known as a boundary between flutter and vibration. We explored various measures to evaluate separability of cortical activity across frequency and found that the hypothesis margin method resulted in the greatest separability between flutter and vibration. This result suggests that flutter and vibration information may be processed by different neural processes in the somatosensory cortex.
随着基于触觉的移动计算系统的发展，对振动触觉信息的神经处理的理解变得至关重要。在人类神经系统中，两种类型的振动触觉信息，即颤动和振动，通过分离的神经传入从机械感受器传递到体感皮层。为了研究体感皮层如何区分颤动和振动，我们分析了对广泛频率的振动触觉刺激的皮层反应。具体而言，我们检查了皮层活动是否在50Hz左右变化最大，50Hz被认为是颤动和振动的界限。我们探索了各种方法来评估跨频率的皮层活动的可分离性，发现假设边际法在颤动和振动之间产生了最大的可分离性。这一结果表明，颤动和振动信息可能在体感皮层中由不同的神经过程进行处理。
