Minami K, Kay V, Bryden M P, Free T
Shinwa Women's College, Kobe, Japan.
Int J Neurosci. 1994 Jan-Feb;74(1-4):55-69. doi: 10.3109/00207459408987229.
A series of studies was carried out to investigate laterality effects in the discrimination of tactile patterns presented to the fingertips of right-handed subjects. When both hands were stimulated simultaneously, a small right-hand advantage (RHA) was observed for a sequential task and a small left-hand advantage (LHA) was found for a spatial task, but only in women and only when there was a delay or mask between presentation and response. This may indicate different attentional strategies for men and women, or better shielding against interhemispheric interference in women. When only one hand was stimulated at a time (unimanual tasks), no laterality effects were found with sequential tasks, but a substantial RHA for a spatial task was observed. Because the unimanual spatial task involves more possible alternatives than the unimanual sequential ones, this RHA may be a consequence of increased information load rather than a the spatial/sequential distinction. While laterality effects in tactile laterality studies are relatively inconsistent, there are clear differences between bimanual and unimanual presentation. Effects related to hemispheric specialization are much more evident with bilateral presentation.
开展了一系列研究，以调查右利手受试者指尖触觉模式辨别中的偏侧性效应。当双手同时受到刺激时，在序列任务中观察到右手有微小优势（RHA），在空间任务中发现左手有微小优势（LHA），但仅在女性中出现，且仅当呈现与反应之间存在延迟或掩蔽时才会出现。这可能表明男性和女性采用了不同的注意力策略，或者女性对半球间干扰的屏蔽能力更强。当一次仅刺激一只手（单手任务）时，序列任务未发现偏侧性效应，但在空间任务中观察到明显的右手优势。由于单手空间任务比单手序列任务涉及更多可能的选择，这种右手优势可能是信息负荷增加的结果，而非空间/序列差异所致。虽然触觉偏侧性研究中的偏侧性效应相对不一致，但双手呈现和单手呈现之间存在明显差异。与半球特化相关的效应在双侧呈现时更为明显。
