Effects of lesions to the cerebellar vermis and hemispheres on timing and counting in rats

被引:37
作者
Breukelaar, JWC [1 ]
Dalrymple-Alford, JC [1 ]
机构
[1] Univ Canterbury, Dept Psychol, Christchurch, New Zealand
关键词
D O I
10.1037/0735-7044.113.1.78
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
The effects of lesions to the cerebellum on numerical and temporal discrimination were examined in rats using a psychophysical choice procedure. Lesions to the cerebellar hemispheres but not the cerebellar vermis produced performance deficits in a numerical discrimination task (2-8 events) and a milliseconds temporal discrimination task (0.2-0.8 s). However, temporal discriminations in the seconds range (2-8 s) were unaffected by either type of lesion. Using W. H. Meek and R. M. Church's (1983) mode-control model of timing and counting, these findings suggest that damage to the cerebellar hemispheres influences a source of constant variability (e.g., switch processes) because constant variability is a prominent source of error during both milliseconds timing and counting but is masked by other sources of variability when timing longer durations (>2 s).
引用
收藏
页码:78 / 90
页数:13
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