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The commissura anterior compensates asymmetries of visual representation in pigeons
Laterality ( IF 2.167 ) Pub Date : 2021-02-23 , DOI: 10.1080/1357650x.2021.1889577
Qian Xiao 1, 2 , Onur Güntürkün 1
Affiliation  

ABSTRACT

This study was undertaken to understand what is transferred between hemispheres through the commissura anterior during a colour discrimination task in pigeons. We transiently blocked neuronal activity of the arcopallium of one hemisphere to interrupt interhemispheric communication. Before and during this intervention, we recorded from arcopallial neurons of the non-anaesthetized side while the animals discriminated stimuli ipsilateral to the recorded neurons. Due to the complete crossover of optic nerves in birds, we assumed that these neurons were at least in part requiring information from the other hemisphere to properly run the task. While lidocaine injections in both hemispheres caused some performance reductions, deficits of right arcopallial neurons were much larger when blocking interhemispheric transfer. Our results make it likely that visual information is exchanged through the commissura anterior in an asymmetrical manner with the left hemisphere providing the other side more information about the right visual half-field than vice versa.



中文翻译:

连合前壁可补偿鸽子视觉表现的不对称性

摘要

进行这项研究的目的是为了了解鸽子在进行颜色辨别任务时,通过半合前叶在半球之间传递的信息。我们短暂地阻断了一个半球arcopallium的神经元活动,以中断半球之间的交流。在此干预之前和之中,我们从未麻醉侧的足弓神经元记录下来,而动物则对记录的神经元同侧的刺激进行了区分。由于鸟类的视神经完全交叉,我们认为这些神经元至少部分需要其他半球的信息才能正常运行任务。虽然在两个半球注射利多卡因会导致某些性能下降,但是当阻止半球间转移时,右弓腹神经元的缺损会更大。

更新日期:2021-04-09
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