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. Author manuscript; available in PMC: 2016 Apr 1.
Published in final edited form as: J Hand Ther. 2014 Nov 15;28(2):185–194. doi: 10.1016/j.jht.2014.11.002

Figure 1.

Figure 1

EMG-based biofeedback device with vibration motor embedded. The device alerts the person of his/her muscle activity with smooth changes in the speed of a silent vibration motor. Proportional tactile feedback is achieved by driving the motor with a signal proportional to the estimated EMG power, and the vibration is provided at the site of the active muscle.