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Analysis of involuntary movement and development of a writing assistance system for adults with tension athetosis type cerebral palsy

Activities of daily living, such as handwriting, eating and walking, are necessary activities for everyone. However, some individuals with a disability cannot perform such activities because of involuntary movements. It is particularly difficult to write because writing involves very complex motions. We applied an adaptive involuntary movement attenuation filter to a handwriting support system. We analyzed involuntary movements in patients with cerebral palsy of the adult tension athetosis type. We selected the parameters of the Adaptive Involuntary Behavior Attenuation Filter (AIBAF) by using the characteristics of involuntary movement.