頭頂部中間反応 (Middle Latency Response) について

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  • Middle Latency Response in Adults and Children

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The middle latency response of averaged electroencephalic response to click stimuli were investigated on 8 adults and 8 young children aged from 8 months to 4 years 2 months. The hearing of all subjects were proved to be normal. The results obtained from this studies were as follows:<br>(1) In adults, the great stability was found in the configulations of the response waves and the latency during both awake and asleep, as many authors reported previously. But, there were some inter-subjective variability of the appearance of the response.<br>(2) The response pattern of the young children was unstable during sleep. Especially, Na- and Pa-peak were not consistently detected. It seemed that the appearance of the response tended to depend upon the sleep stage in children. Therefore, the clinical usefulness of the middle latency response, as an objective audiometry for children, may be diminished.<br>(3) It was highly suspected that the origin of Po-peak would be different from that of Na- and Pa-peak.

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