Receptive field characteristics under electrotactile stimulation of the fingertip

IEEE Transactions on Neural Systems and Rehabilitation Engineering : a Publication of the IEEE Engineering in Medicine and Biology Society
Jay P WarrenStephen I Helms Tillery

Abstract

Skin on human fingertips has high concentrations of mechanoreceptors, which are used to provide fine resolution tactile representations of our environment. Here, we explore the ability to discriminate electrotactile stimulation at four sites on the fingertip. Electrical stimulation was delivered to arrays of electrodes centered on the index fingertip (volar aspect). Accuracy of discrimination was tested by examining electrode size, interelectrode spacing, and stimulation frequency as primary factors. Electrical stimulation was delivered at 2 mA with the pulse width modulated to be at (or above) perceptual threshold at 25 and 75 Hz and an average pulse width of 1.03 ms (+/- 0.70 ms standard deviation). Discrimination of the stimulated locations under this stimulation paradigm was significantly above chance level in all cases. Subjects' ability to discriminate stimulus location was not significantly influenced by electrode size or stimulation frequency when considered as separate factors. However, increased electrode spacing significantly increased subjects' ability to discriminate the location of the stimulated electrode. Further analysis revealed that errors were only significantly reduced along the medial-lateral direction wit...Continue Reading

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Citations

Sep 24, 2010·Experimental Brain Research·Jay P WarrenStephen I Helms Tillery
Apr 6, 2011·PloS One·Jay P WarrenStephen I Helms Tillery
Jan 15, 2016·International Journal of Neural Systems·Dingguo ZhangXiangyang Zhu
Sep 4, 2015·IEEE Transactions on Haptics·Dianne T V PawlukRyo Kitada
Oct 11, 2011·IEEE Transactions on Neural Systems and Rehabilitation Engineering : a Publication of the IEEE Engineering in Medicine and Biology Society·Liliana Rincon-GonzalezStephen Helms Tillery
Jun 15, 2012·IEEE Transactions on Neural Systems and Rehabilitation Engineering : a Publication of the IEEE Engineering in Medicine and Biology Society·Erhan AkdoganToshio Tsuji
May 2, 2015·Journal of Neuroengineering and Rehabilitation·Dingguo ZhangXiangyang Zhu
Sep 16, 2015·IEEE Transactions on Neural Systems and Rehabilitation Engineering : a Publication of the IEEE Engineering in Medicine and Biology Society·Heng XuXiangyang Zhu
Jun 21, 2016·IEEE Transactions on Neural Systems and Rehabilitation Engineering : a Publication of the IEEE Engineering in Medicine and Biology Society·Guohong ChaiXiangyang Zhu
Aug 22, 2009·Somatosensory & Motor Research·Cecil A LozanoMarco Santello

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