Antfolk Christian, Balkenius Christian, Rosén Birgitta, Lundborg Göran, Sebelius Fredrik
Department of Electrical Measurements, Lund University, Lund, Sweden.
Scand J Plast Reconstr Surg Hand Surg. 2010 Feb;44(1):50-3. doi: 10.3109/02844310903259090.
A major drawback with myoelectric prostheses is that they do not provide the user with sensory feedback. Using a new principle for sensory feedback, we did a series of experiments involving 11 healthy subjects. The skin on the volar aspect of the forearm was used as the target area for sensory input. Experiments included discrimination of site of stimuli and pressure levels at a single stimulation point. A tactile display based on digital servomotors with one actuating element for each of the five fingers was used as a stimulator on the forearm. The results show that the participants were able to discriminate between three fingers with an accuracy of 97%, between five fingers with an accuracy of 82%, and between five levels with an accuracy of 79%. The tactile display may prove a helpful tool in providing amputees with sensory feedback from a prosthetic hand by transferring tactile stimuli from the prosthetic hand to the skin at forearm level.
肌电假肢的一个主要缺点是它们无法为使用者提供感觉反馈。利用一种新的感觉反馈原理，我们对11名健康受试者进行了一系列实验。前臂掌侧的皮肤被用作感觉输入的目标区域。实验包括对单个刺激点处刺激部位和压力水平的辨别。一种基于数字伺服电机的触觉显示器被用作前臂的刺激器，每个手指都有一个驱动元件。结果表明，参与者能够以97%的准确率区分三根手指，以82%的准确率区分五根手指，以79%的准确率区分五个水平。通过将触觉刺激从假手传递到前臂水平的皮肤，这种触觉显示器可能会成为一种有用的工具，为截肢者提供来自假手的感觉反馈。
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