Influence of feedback parameters on performance of a vibrotactile balance prosthesis.
Influence of feedback parameters on performance of a vibrotactile balance prosthesis.
复制标题
反馈参数对颤振平衡假体性能的影响。
DOI：
10.1109/tnsre.2009.2023309
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发表时间：
2009-08
期刊：
影响因子：
--
通讯作者：
Peterka RJ
中科院分区：
文献类型：
--
作者：
Goodworth AD;Wall C 3rd;Peterka RJ
We investigated the influence of feedback conditions on the effectiveness of a balance prosthesis. The balance prosthesis used an array of 12 tactile vibrators (tactors) placed on the anterior and posterior surfaces of the torso to provide body orientation feedback related to several different combinations of angular position and velocity of body sway in the sagittal plane. Control tests were performed with no tactor activation. Body sway was evoked in subjects with normal sensory function by rotating the support surface upon which subjects stood with eyes closed. Body sway was analyzed by computing root-mean-square sway measures and by a frequency-response function analysis that characterized the amplitude (gain) and timing (phase) of body sway over a frequency range of 0.017 to 2.2 Hz. Root-mean-square sway measures showed a reduction of surface stimulus evoked body sway for most vibrotactile feedback settings compared to control conditions. However, frequency-response function analysis showed that the sway reduction was due primarily to a reduction in sway below about 0.5 Hz, whereas there was actually an enhancement of sway above 0.6 Hz. Finally, we created a postural model that accounted for the experimental results and gave insight into how vibrotactile information was incorporated into the postural control system.
