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Biomed Sci Instrum. 2013;49:62-7.

An electronic communication system for amyotrophic lateral sclerosis patients - biomed 2013.

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Hiroshima Institute of Technology.


Amyotrophic lateral sclerosis is a progressive degeneration of motor neurons. Patients with the disease lose their ability to speak and to use their hands as the disease progresses. We have developed a new electronic communication system that enables communication by blinking of the eyes. The system consists of a light emitting diode (LED), two silicone rubber electrodes, an electrooculogram (EOG) recorder, a microcontroller, a sound reproduction board, a pillow speaker and a low power mobile phone. The two silicone rubber electrodes record the EOG induced by blinking the eyes synchronized with LED flashing. The EOG is amplified by the EOG recorder. The microcontroller detects the blinking from the amplified EOG, and then their meanings are confirmed by voice. After that, the patientÂ’s intention is transmitted to the nurse by a low power mobile phone so the care giver is kept in the loop.

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