Interhemispheric Stroop effects in partial and complete agenesis of the corpus callosum

被引:28
作者
Brown, WS
Thrasher, ED
Paul, LK
机构
[1] Fuller Grad Sch Psychol, Travis Inst Biopsychosocial Res, Pasadena, CA 91101 USA
[2] Univ Calif Los Angeles, Brain Res Inst, Los Angeles, CA 90024 USA
[3] Univ Calif Los Angeles, Dept Psychiat & Biobehav Sci, Los Angeles, CA 90024 USA
关键词
Stroop interference; agenesis of the corpus callosum; interhemispheric interactions; anterior commissure;
D O I
10.1017/S1355617701733048
中图分类号
R74 [神经病学与精神病学];
学科分类号
摘要
Previous research had demonstrated diminished interhemispheric Stroop effects in individuals with agenesis of the corpus callosum (ACC), suggesting an important role for the callosum in interhemispheric color-word and color-patch interactions. However. this outcome rested on the results of only 1 ACC participant, who had normal intelligence and a minimum of other neuropathology. In the research reported herein, the role of the corpus callosum in interhemispheric Stroop interference and facilitation was investigated in 9 individuals with complete or partial ACC and normal intelligence, and in non-ACC controls. Congruent, incongruent, or neutral stimulus pairs were presented either unilaterally (color-patch and color-word in the same visual field) or bilaterally (color-patch and color-word in different visual fields). Both unilateral and bilateral (interhemispheric) Stroop interference were found for both ACC and non-ACC groups, with no significant difference in magnitude, indicating that extracallosal pathways are sufficient for mediating this phenomenon. It is suggested that the anterior commissure is a more likely candidate for the interhemispheric transmission of the semantic information resulting in Stroop interference.
引用
收藏
页码:302 / 311
页数:10
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