A study on laterality in auditory reaction time of patients with cerebrovascular accident.
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概要
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The auditory function of patients with hemispheric damage due to cerebrovascular accident was evaluated by measuring auditory reaction times.The tests were performed on simple reaction, discrimination reaction, binaural discrimination reaction, and tapping.The results of the tests were considered assuming that the tests are able to evaluate the processes of recognition, discrimination, binaural discrimination, and performance reaction to stimulated sounds.Results are. as follows; 1) Tapping time of younger snbjects was significantly faster than that of older onees. The trapping time of hemiplegic groups had no difference between right and left hands and it was the same as that of normal aged group.2) Although simple reaction time of normal group did not show prolonged time among different aged groups, discrimination time was prolonged.3) There was a significant laterality between tight and left ears in hoth simple and discrimina-tion reaction times of hemiplegic groups and the prolonged time was remarkable in affected side.4) Prolonged time of simple reaction of hemiplegic groups was recognized in the ears of both affected and sound sides, compared with that of normal aged group. Prolonged time of dis-crimination reaction was recognized only in the ear of affected side and almost the same reaction time in the car of sound side was recognized in the normal aged group.5) Binaural discrimination time of normal group was prolonged with the age increased. Right hemiplegic groups had almost the same reaction time as the normal group. On the other hand, left hemiplegic group had a remarkable prolonged time, 6) There was a tendency that hemiplegic groups had more errors in binaural discrimination reaction test when they heard the stimulation which should be selected to the ears of sound side.As indicated above, the auditory function of hemiplegic groups tend to listen to sounds dominantly with the ears of sound side and it is possible to infer "lowering of hearing" recognized in hemispheric damage by prolongation of reaction time, lateralitv, and errors of discrimination.
- 一般社団法人 日本耳鼻咽喉科学会の論文