Parallel Channels for Motion Feature Extraction in the Pretectum and Tectum of Larval Zebrafish.,Cell Reports

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Parallel Channels for Motion Feature Extraction in the Pretectum and Tectum of Larval Zebrafish.
Cell Reports ( IF 7.5 ) Pub Date : 2020-01-14 , DOI: 10.1016/j.celrep.2019.12.031
Kun Wang ₁ , Julian Hinz ₁ , Yue Zhang ₁ , Tod R Thiele ₂ , Aristides B Arrenberg ₃

Affiliation

Non-cortical visual areas in vertebrate brains extract relevant stimulus features, such as motion, object size, and location, to support diverse behavioral tasks. The optic tectum and pretectum, two primary visual areas in zebrafish, are involved in motion processing, and yet their differential neural representation of behaviorally relevant visual features is unclear. Here, we characterize receptive fields (RFs) of motion-sensitive neurons in the diencephalon and midbrain. We show that RFs of many pretectal neurons are large and sample the lower visual field, whereas RFs of tectal neurons are mostly small-size selective and sample the upper nasal visual field more densely. Furthermore, optomotor swimming can reliably be evoked by presenting forward motion in the lower temporal visual field alone, matching the lower visual field bias of the pretectum. Thus, tectum and pretectum extract different visual features from distinct regions of visual space, which is likely a result of their adaptations to hunting and optomotor behavior, respectively.

中文翻译：

幼虫斑马鱼前盖和直肠中运动特征提取的并行通道。

脊椎动物大脑中的非皮质视觉区域会提取相关的刺激特征，例如运动，物体大小和位置，以支持各种行为任务。斑马鱼的两个主要视觉区域是视皮层和前皮层，它们参与了运动处理，但是它们与行为相关的视觉特征的差异神经表示尚不清楚。在这里，我们表征中脑和中脑的运动敏感神经元的感受野（RFs）。我们显示，许多前盖神经元的RFs大，并采样较低的视野，而顶盖神经元的RFs主要是小尺寸的，并且较密集地采样了上鼻腔的视野。此外，仅在较低的颞部视野中呈现向前运动，就可以可靠地诱发光动力游泳，匹配前盖的较低视野偏差。因此，保护层和前保护层从视觉空间的不同区域提取不同的视觉特征，这可能是它们分别适应于狩猎和光动力行为的结果。

更新日期：2020-01-15

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