注意偏侧化研究

Laterality of attentional networks

目的探讨正常参试者双侧大脑半球间三个注意网络效率是否具有偏侧化。方法运用偏侧化注意网络实验范式,分析48个正常参试者的双侧视野的定向、警觉、执行控制网络效率。结果在定向网络功能上,右侧视野的平均反应时间比左侧的长(t=-2.861,P<0.05),反应错误率也比左侧高(t=-2.408,P<0.05),差异均有统计学意义;在执行控制网络功能上,左右侧视野的平均反应时间和反应错误率比较,差异无统计学意义;在警觉网络功能上,左右侧视野的平均反应时间和反应错误率差异无统计学意义。结论正常被试左侧大脑半球在定向功能上占优势,而执行控制和警觉功能在双侧大脑半球无差异。

Objective To explore whether there were hemispheric asymmetries in the efficiency of attentional networks （ alerting, orienting, executive control）. Methods Normal subjects （ n = 48 ） were selected and LANT（ Lateralized Attention Network Test） was used to investigate the efficiency of the networks in both visual fields. Results Reaction time（RT） of right visual field were significantly longer （ t = - 2. 861, P 〈 0.05 ）, error rate （ERR） of right visual field were significantly higher（ t = - 2. 408, P 〈 0. 05 ） when compared to those of left visual field in orienting. No significant alerting and conflict effects of visual fields were observed either for the RT or the ERR. Conclusion Attentional networks are distributed asymmetrically across hemispheres and spatial orientation is controlled by the left hemisphere. However, Alerting and executive conflict are distributed symmetrically across hemispheres.