Human behavioral asymmetries are commonly studied in the context of structural cortical and connectional asymmetries. Within this framework, Sreenivasan and Sridharan (1) provide intriguing evidence of a relationship between visual asymmetries and the lateralization of superior colliculi connections—a phylogenetically older mesencephalic structure. Specifically, response facilitation for cued locations (i.e., choice bias) in the contralateral hemifield was associated with differences in the connectivity of the superior colliculus. Given that the superior colliculus has a structural homolog—the optic tectum—which can be traced across all Vertebrata, these results may have meaningful evolutionary ramifications.

中文翻译：

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用于视觉引导行为的祖先解剖和空间偏向。

人类行为不对称通常是在结构性皮层和连接不对称的背景下研究的。在此框架内，Sreenivasan和Sridharan（1）提供了有趣的证据，说明视觉不对称与上丘骨连接的侧向化（系统发育较老的中脑结构）之间的关系。具体而言，对侧半场提示位置（即选择偏向）的响应促进与上丘连接性的差异有关。鉴于上丘大学具有可以追溯到所有椎骨的结构同系物-光学顶盖，这些结果可能会有有意义的进化影响。