Contractures are generally assessed by a physician or physical therapist through palpation. However, contracture palpation requires skill and experience. The frictional vibration, which has a pulse-like vibration due to sliding disturbances around the affected area during palpation, is important in assessing the degree of contracture progression. This paper aims to enhance the perceptual sensitivity of frictional vibration for contracture palpation using a vibrotactile feedback system. We previously proposed an evaluation system for palpation with a wearable skin vibration sensor that detects skin-propagated vibration, allowing touch with a bare fingertip. In this paper, we propose the vibrotactile feedback system that presents the tactile information of the fingertip detected by the wearable tactile sensor to the temples with a vibrotactile display. A stimulator that gives vibrations similar to those during the palpation, which include pulse-like vibration and small vibration, was assembled. Then, psychophysical experiments on the vibrotactile feedback system were conducted using this stimulator. The results showed that the detection sensitivity of the pulse-like vibration was significantly enhanced with the feedback.

中文翻译：

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从指尖到太阳穴的振动触觉反馈系统用于增强挛缩触诊的感知

挛缩通常由医生或物理治疗师通过触诊进行评估。然而，挛缩触诊需要技巧和经验。由于触诊期间受影响区域周围的滑动干扰，摩擦振动具有脉冲状振动，对于评估挛缩进展程度很重要。本文旨在使用振动触觉反馈系统提高摩擦振动对挛缩触诊的感知灵敏度。我们之前提出了一种带有可穿戴皮肤振动传感器的触诊评估系统，该传感器检测皮肤传播的振动，允许用裸指尖进行触摸。在本文中，我们提出了振动触觉反馈系统，该系统通过振动触觉显示器将可穿戴触觉传感器检测到的指尖的触觉信息呈现给太阳穴。组装了一个刺激器，它产生类似于触诊期间的振动，包括脉冲状振动和小振动。然后，使用该刺激器对振动触觉反馈系统进行了心理物理实验。结果表明，脉冲式振动的检测灵敏度随着反馈而显着提高。