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Saccade dysmetria in Williams-Beuren syndrome
被引:24
|作者:
van der Geest, JN
Lagers-van Haselen, GC
van Hagen, JM
Govaerts, LCP
de Coo, IFM
de Zeeuw, CI
Frens, MA
机构:
[1] Erasmus Univ, Dept Neurosci, NL-3000 DR Rotterdam, Netherlands
[2] Vrije Univ Amsterdam Med Ctr, Dept Clin Genet & Human Genet, Amsterdam, Netherlands
[3] Erasmus MC, Dept Clin Genet, Sect Postnatal Cytogenet, Rotterdam, Netherlands
[4] Erasmus MC, Dept Neurol, Rotterdam, Netherlands
关键词:
genetic disorder;
oculomotor;
eye movements;
accuracy;
spatial vision;
cerebellum;
D O I:
10.1016/j.neuropsychologia.2003.11.003
中图分类号:
B84 [心理学];
C [社会科学总论];
Q98 [人类学];
学科分类号:
03 ;
0303 ;
030303 ;
04 ;
0402 ;
摘要:
Numerous studies have described the poor visuo-spatial processing capacities of subjects with Williams-Beuren syndrome (WBS), a genetically based developmental disorder. Since visual perception and eye movements are closely related we hypothesized that the poor visuo-spatial processing capacities of subjects with WBS might be related to a poor saccadic control. Thereto, we recorded horizontal and vertical saccadic eye movements to targets using infrared video-oculography in 27 subjects with WBS and eight healthy controls. In the WBS group saccadic gains were highly variable, both between and within individual subjects, and they often needed more than one correction saccade to reach the target. Ten (out of a subgroup of 22) WBS subjects showed a large number of hypometric and/or hypermetric saccades, and, also a left-right asymmetry in saccadic gains was observed in WBS. We conclude that the observed impairments in saccadic control are likely to affect the proper processing of visuo-spatial information. (C) 2003 Elsevier Ltd. All rights reserved.
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页码:569 / 576
页数:8
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