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Please use this identifier to cite or link to this item:
http://hdl.handle.net/2241/113941
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| Title: | 弱視者の衝動性眼球運動の特性 |
| Other Titles: | The Characteristics of Saccadic Eye Movements in the Partially Sighted |
| Authors: | 柿沢, 敏文
中田, 英雄
谷村, 裕
Kakizawa, Toshibumi
Nakata, Hideo
カキザワ, トシブミ
ナカタ, ヒデオ |
| Issue Date: | Dec-1987 |
| Publisher: | 日本特殊教育学会 |
| Journal Title: | 特殊教育学研究 |
| Volume: | 25 |
| Issue: | 3 |
| Start Page: | 31 |
| End Page: | 39 |
| Abstract: | 弱視者6名と晴眼者6名の衝動性眼球運動をEOG法(DC記録)を用いて測定した。被検者の左右5°と10°の位置(眼前100cm)に視標を配置し、ランダムに点灯させた。視標の注視によって生じる衝動性眼球運動のEOGをコンピュータを用いて分析し、最大速度と振幅を求めた。さらに、用手法を用いて潜時を計測した。その結果、晴眼者の衝動性眼球運動は平均潜時が約200msであった。また、固視点から視標までの偏位角度が5°の場合、平均最大速度は160°/s、平均振幅は約5.4°であった。10°の場合は平均最大速度は約250°/sとなり平均振幅は約10.8°であった。弱視者の潜時は晴眼者と比較すると有意に長く、その平均値は約220msであった。また、平均最大速度と平均振幅は偏位角度が5°の場合に約160°/sと約5.0°であり、10°の場合に約250°/sと約10.2°であった。弱視者の衝動性眼球運動の最大速度と振幅は晴眼者とほぼ等しいが、潜時は有意に長い傾向が認められた。
Saccadic eye movements in horizontal plane were binocularly recorded with DC-electrooculography (EOG) in 6 sighted and 6 partially sighted subjects. A stimulus, LED, located 1. 0 m from the subject showed a step displacement to the right or left. The direction as well as stimulus step size was determined randomly. Step displacements of the stimulus were either 5° or 10°. Subjects prevented from any head movements with headrest and dental bite board were asked to track the stimulus step displacement as correctly as possible. Each subject made 40 responses, 10 to each stimulus position. As a result of computer analysis of EOG, we obtained the peak velocity and amplitude of saccadic eye movements. Since the correct latency of saccadic eye movements could not be obtained by computer analysis, the latency fitted by eye was employed. Increased latency was observed in the partially sighted. Mean latency of the sighted and the partially sighted showed 200ms and 220ms respectively. It was found that the peak velocity increased as the amplitude increased in the sighted and the partially sighted, and there was no significant difference in the peak velocity between the two groups. The sighted and the partially sighted showed accurate amplitude of the saccadic eye movements. In conclusion, the partially sighted had difficulty controlling the timing of their saccadic eye movements. Since there was the amplitude-peak velocity relationship in the partially sighted, their oculomotor systems seemed to be intact neurologically. The difficulty the partially sighted have might be attributed to their eye disease, low visual acuity, narrowed visual field, and lack of oculomotor skills. |
| URI: | http://hdl.handle.net/2241/113941 |
| Rights: | 日本特殊教育学会
本文データは学協会の許諾に基づきCiNiiから複製したものである |
| Text Version: | publisher |
| Appears in Collections: | 柿澤 敏文 (Kakizawa Toshibumi)
中田 英雄 (Nakata Hideo)
特殊教育学研究
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