Visual Motion Processing in Macaque V2.

Visual Motion Processing in Macaque V2.
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DOI:
10.1016/j.celrep.2018.09.014
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发表时间:
2016-12
期刊:
影响因子:
8.8
通讯作者:
Jiaming Hu;Heng Ma;Shude Zhu;Peichao Li;Haoran Xu;Yang Fang;Ming Chen;Chao Han;Chen Fang;Xingya Cai;Kun Yan;Haidong D. Lu
Jiaming Hu;Heng Ma;Shude Zhu;Peichao Li;Haoran Xu;Yang Fang;Ming Chen;Chao Han;Chen Fang;Xingya Cai;Kun Yan;Haidong D. Lu
中科院分区:
生物学1区
文献类型:
--
作者:
Jiaming Hu;Heng Ma;Shude Zhu;Peichao Li;Haoran Xu;Yang Fang;Ming Chen;Chao Han;Chen Fang;Xingya Cai;Kun Yan;Haidong D. Lu

文献摘要

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在灵长类视觉系统中,方向选择(DS)神经元对视觉运动感知至关重要。虽然背侧视觉通路中的DS神经元已经得到很好的表征,但其他主要视觉区域中的DS神经元的反应特性在很大程度上尚未探索。最近的光学成像研究显示,在猴子的视觉皮层2区(V2)的DS神经元集群。这种成像方法有助于从这些神经元进行靶向记录。使用光学成像和单细胞记录,我们的特点是详细的反应特性的DS神经元在猕猴V2。与背侧区的DS神经元(例如,中颞区(MT),V2DS神经元感受野较小,拮抗性较强。他们不编码速度或格子运动,但对运动对比敏感。我们的研究结果表明,V2 DS神经元在图形-背景分离中起着重要作用。V2 DS神经元簇可能是用于检测运动对比度的专门功能系统。
In the primate visual system, direction-selective (DS) neurons are critical for visual motion perception. While DS neurons in the dorsal visual pathway have been well characterized, the response properties of DS neurons in other major visual areas are largely unexplored. Recent optical imaging studies in monkey visual cortex area 2 (V2) revealed clusters of DS neurons. This imaging method facilitates targeted recordings from these neurons. Using optical imaging and single-cell recording, we characterized detailed response properties of DS neurons in macaque V2. Compared with DS neurons in the dorsal areas (e.g., middle temporal area [MT]), V2 DS neurons have a smaller receptive field and a stronger antagonistic surround. They do not code speed or plaid motion but are sensitive to motion contrast. Our results suggest that V2 DS neurons play an important role in figure-ground segregation. The clusters of V2 DS neurons are likely specialized functional systems for detecting motion contrast.