Gülbetekin Evrim, Güntürkün Onur, Dural Seda, Cetinkaya Hakan
Abteilung Biopsychologie, Fakultät für Psychologie, Ruhr-Universität Bochum, Bochum, Federal Republic of Germany.
Behav Neurosci. 2009 Aug;123(4):815-21. doi: 10.1037/a0016406.
Adult Japanese quail display left-eye/right-hemisphere dominance in visually guided sexual tracking. In 2 experiments, the authors set out to answer if this functional cerebral asymmetry is modifiable by posthatch monocular deprivation. In Experiment 1, the left or the right eye of 2-day old quail were closed for 70 days. Quail were run in a left- or a right-turning runway to obtain access to a conspecific of the opposite sex. The performance of both left and right eye systems was equal. In Experiment 2, the deprived eyes of the quail were opened and the previously open eyes were closed. They were tested with the same runways. Overall, running speed was very low, but the quail showed a left-eye/right-hemisphere superiority. Altogether, these experiments evince 3 insights into cerebral asymmetries in quail. First, posthatch asymmetries of visual input can alter lateralized behavior to an important extent. Second, cerebral asymmetries could involve an interhemispheric inhibition that can be modified by epigenetic factors. Third, even long-term visual deprivation does not abolish a previously established cerebral asymmetry.
成年日本鹌鹑在视觉引导的性追踪中表现出左眼/右半球优势。在两项实验中，作者着手探究这种功能性脑不对称是否可通过孵化后单眼剥夺来改变。在实验1中，将2日龄鹌鹑的左眼或右眼闭合70天。鹌鹑在左转或右转跑道上奔跑，以接近异性同种个体。左眼和右眼系统的表现相当。在实验2中，将鹌鹑被剥夺的眼睛睁开，而之前睁开的眼睛则闭合。它们在相同的跑道上接受测试。总体而言，奔跑速度非常低，但鹌鹑表现出左眼/右半球优势。总之，这些实验揭示了关于鹌鹑脑不对称的三点见解。第一，孵化后的视觉输入不对称可在很大程度上改变偏侧化行为。第二，脑不对称可能涉及一种可被表观遗传因素改变的半球间抑制。第三，即使长期视觉剥夺也不会消除先前建立的脑不对称。
