P300, handedness, and corpus callosal size: gender, modality, and task
P300, handedness, and corpus callosal size: gender, modality, and task
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DOI：
10.1016/s0167-8760(98)00050-6
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发表时间：
1999-01-01
影响因子：
3
通讯作者：
Polich, J
中科院分区：
文献类型：
--
作者：
Hoffman, LD;Polich, J
P300事件相关电位（ERP）是在左利手和右利手的年轻成年男性和女性受试者（n = 20/组）中诱发的，采用来自单次刺激和奇怪任务的听觉和视觉刺激方式。与右利手受试者相比，在所有条件下，左利手受试者的前部和中央电极部位的 P300 振幅都更大。与右撇子相比，左撇子在所有条件下的 P300 潜伏期都较短。任务类型不影响 ERP 惯用手差异。男性和女性受试者表现出类似的 ERP 偏手效应，尽管与女性相比，男性获得的 P300 成分较小。当考虑到先前报道的左撇子与右撇子以及男性与女性参与者的胼胝体大小差异时，研究结果表明 P300 反映了胼胝体大小和半球间传输效率。 (C) 1999 Elsevier Science B.V. 保留所有权利。
The P300 event-related potential (ERP) was elicited in left- and right-handed young adult male and female subjects (n = 20/group), with auditory and visual stimulus modalities from single-stimulus and oddball tasks. P300 amplitude was larger across all conditions for left- compared to right-handed subjects at anterior and central electrode sites. P300 latency was shorter across all conditions for left- compared to right-handers. Task type did not affect the ERP handedness differences. Male and female subjects demonstrated comparable ERP handedness effects, although smaller P300 components were obtained for males compared to females. When considered in the context of previously reported corpus callosal size differences for left- vs. right-handed and male vs. female participants, the findings suggest that the P300 reflects callosal size and inter-hemispheric transmission efficacy. (C) 1999 Elsevier Science B.V. All rights reserved.