Sex hormonal modulation of hemispheric asymmetries in the attentional blink
Sex hormonal modulation of hemispheric asymmetries in the attentional blink
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DOI：
10.1017/s1355617705050319
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发表时间：
2005-05-01
影响因子：
2.6
通讯作者：
Corballis, MC
中科院分区：
文献类型：
--
作者：
Holländer, A;Hausmann, M;Corballis, MC
本研究探讨女性月经周期中性腺类固醇激素调节的功能性大脑不对称性的差异。21名月经周期规律的右利手女性在低类固醇月经期和高类固醇黄体中期进行了双流快速串行视觉呈现（RSVP）任务，每个视野中有一个流。他们需要检测一个目标项目，然后是一个探测项目，每个项目都可以出现在任何一个流中。如果探测项出现在目标之后200毫秒，探测的检测就会受到损害--这种现象被称为“注意力瞬脱”。“这种情况发生在黄体中期的两条溪流中，但仅发生在月经期间的右视野中。因此，低水平的类固醇激素似乎限制了左半球的注意瞬脱，而高水平的雌二醇和孕酮在黄体中期出现减少功能不对称的选择性增加注意瞬脱在右半球。这种作用似乎是由雌二醇而不是孕酮介导的。这也与黄体中期右半球功能受到抑制的假设相一致。
The present study examines differences in functional cerebral asymmetries modulated by gonadal steroid hormones during, the menstrual cycle in women. Twenty-one right-handed women with regular menstrual cycles performed a double-stream rapid serial Visual presentation (RSVP) task, with one stream in each visual field, during the low steroid menses and the high steroid midluteal phase. They were required to detect a target item, and then a probe item, each of which could appear in either stream. If the probe item appeared 200 ms after the target, detection of the probe was impaired-a phenomenon known as the "attentional blink." This occurred in both streams in the midluteal phase but only in the right visual field during menses. Thus low steroid levels appeared to restrict the attentional blink to the left hemisphere, while high levels of estradiol and progesterone in the midluteal phase appeared to reduce functional asymmetries by selectively increasing the attentional blink in the right hemisphere. This effect appears to be mediated by estradiol rather than progesterone. and it is compatible with the assumption Of a hormone-related suppression of right hemisphere functions during the midluteal phase.