Abstract
Amyotrophic Lateral Sclerosis (ALS) patients are unable to successfully communicate their desires, although their mentality is normal, and so, the necessity of Communication Aids (CA) is realized. Therefore, the author is focused on Event-Related Potential (ERP) which is elicited for the target by visual and auditory stimuli. P200, N200 and P300 are components of ERP. These are potentials that are elicited when the subject focuses attention on stimuli that appears infrequently. ALS patient participated in Target Stimulus-Specific Experiment. The category of stimuli are “Word”, “Picture”, “Illustration”, “Character”, “Voice” and “Character & Voice”. Each category of stimulus has 5 stimuli. By detecting ERP, a target stimulus was specified. The author described the number of correct judgment, feature of ERP to each stimulus, and discussed how to improve the number of correct judgment.
