Effect of adaptation to telescopic spectacles on the initial human horizontal vestibuloocular reflex.
Effect of adaptation to telescopic spectacles on the initial human horizontal vestibuloocular reflex.
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适应望远镜眼镜对人类初始水平前庭眼反射的影响。
DOI：
10.1152/jn.2000.83.1.38
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发表时间：
2000
期刊：
影响因子：
--
通讯作者：
Demer,JL
中科院分区：
文献类型：
--
作者：
Crane,BT;Demer,JL
Gain of the vestibuloocular reflex (VOR) not only varies with target distance and rotational axis, but can be chronically modified in response to prolonged wearing of head-mounted magnifiers. This study examined the effect of adaptation to telescopic spectacles on the variation of the VOR with changes in target distance and yaw rotational axis for head velocity transients having peak accelerations of 2,800 and 1,000°/s2. Eye and head movements were recorded with search coils in 10 subjects who underwent whole body rotations around vertical axes that were 10 cm anterior to the eyes, centered between the eyes, between the otoliths, or 20 cm posterior to the eyes. Immediately before each rotation, subjects viewed a target 15 or 500 cm distant. Lighting was extinguished immediately before and was restored after completion of each rotation. After initial rotations, subjects wore 1.9× magnification binocular telescopic spectacles during their daily activities for at least 6 h. Test spectacles were removed and measurement rotations were repeated. Of the eight subjects tolerant of adaptation to the telescopes, six demonstrated VOR gain enhancement after adaptation, while gain in two subjects was not increased. For all subjects, the earliest VOR began 7–10 ms after onset of head rotation regardless of axis eccentricity or target distance. Regardless of adaptation, VOR gain for the proximate target exceeded that for the distant target beginning at 20 ms after onset of head rotation. Adaptation increased VOR gain as measured 90–100 ms after head rotation onset by an average of 0.12 ± 0.02 (SE) for the higher head acceleration and 0.19 ± 0.02 for the lower head acceleration. After adaptation, four subjects exhibited significant increases in the canal VOR gain only, whereas two subjects exhibited significant increases in both angular and linear VOR gains. The latencies of linear and early angular target distance effects on VOR gain were unaffected by adaptation. The earliest significant change in angular VOR gain in response to adaptation occurred 50 and 68 ms after onset of the 2,800 and 1,000°/s2peak head accelerations, respectively. The latency of the adaptive increase in linear VOR gain was ∼50 ms for the peak head acceleration of 2,800°/s2, and 100 ms for the peak head acceleration of 1,000°/s2. Thus VOR gain changes and latency were consistent with modification in the angular VOR in most subjects, and additionally in the linear VOR in a minority of subjects.
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影响因子：
2.5
作者：
Lisberger,SG
通讯作者：
Lisberger,SG
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DOI：
10.1126/science.3142040
发表时间：
1988
期刊：
Science (New York, N.Y.)
影响因子：
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作者：
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通讯作者：
Pavelko,TA
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DOI：
10.3109/00016489109131406
发表时间：
1991
期刊：
Acta oto-laryngologica. Supplementum
影响因子：
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作者：
Paige,GD
通讯作者：
Paige,GD
影响因子：
2.5
作者：
LISBERGER, SG
通讯作者：
LISBERGER, SG
影响因子：
2.3
作者：
M. Shelhamer;L. Young
通讯作者：
L. Young