サーチコイルを使用した水平性, 垂直性および斜向性サッケードの定量的解析 Quantitative Analysis of Horizontal, Vertical, and Oblique Saccades Using a Search Coil

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著者

    • 吉田 信 YOSHIDA Shin
    • 山形大学医学部耳鼻咽喉科学教室 Department of Otolaryngology, Yamagata University School of Medicine

抄録

Saccades occur horizontally, vertically, and obliquely, and in movements including adduction and abduction, up and down, centric and eccentric. Few studies have been on vertical and oblique saccades, and no general consensus has developed on the effect of movement on saccades. We recorded horizontal, vertical, and oblique saccades using a search coil in 9 normal subjects, and quantitatively studied saccades in (1) adduction and abduction, (2) up and down, (3) centric and eccentric, and (4) horizontal, vertical, and oblique.<br>Abducting saccades were faster than adducting at an amplitude of 10deg, while centric saccades were faster than eccentric at amplitudes of 20 and 30deg. Both vertical up and centric saccades were faster than others at all amplitudes. The peak velocity of the horizontal component of oblique saccades decreased with the increase in the angle of the stimulus. The peak velocity of vertical component of oblique saccades tended to be faster with the decrease in the angle of the stimulus.<br>We thus found significant differences in velocities of saccades in different directions. Velocity is affected by the direction of eye movement, eye position, and target amplitude. In clinical studies on saccadic eye movement, we should pay more attention to the effect of these factors on saccades. In oblique saccades, note that horizontal and vertical components are completely independent, but interacted.

収録刊行物

  • 日本耳鼻咽喉科學會會報

    日本耳鼻咽喉科學會會報 105(6), 741-750, 2002-06-20

    The Oto-Rhino-Laryngological Society of Japan, Inc.

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各種コード

  • NII論文ID(NAID)
    10008674952
  • NII書誌ID(NCID)
    AN00191551
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    00306622
  • データ提供元
    CJP書誌  J-STAGE 
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