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首页> 外文期刊>Journal of Neurophysiology >Processing of object motion and self-motion in the lateral subdivision of the medial superior temporal area in macaques
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Processing of object motion and self-motion in the lateral subdivision of the medial superior temporal area in macaques

机译：在猕猴中横向细分中的对象运动和自动的处理

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Multiple areas of macaque cortex are involved in visual motion processing, but their relative functional roles remain unclear. The medial superior temporal (MST) area is typically divided into lateral (MSTl) and dorsal (MSTd) subdivisions that are thought to be involved in processing object motion and self-motion, respectively. Whereas MSTd has been studied extensively with regard to processing visual and nonvisual self-motion cues, little is known about self-motion signals in MSTl, especially nonvisual signals. Moreover, little is known about how self-motion and object motion signals interact in MSTl and how this differs from interactions in MSTd. We compared the visual and vestibular heading tuning of neurons in MSTl and MSTd using identical stimuli. Our findings reveal that both visual and vestibular heading signals are weaker in MSTl than in MSTd, suggesting that MSTl is less well suited to participate in self-motion perception than MSTd. We also tested neurons in both areas with a variety of combinations of object motion and self-motion. Our findings reveal that vestibular signals improve the separability of coding of heading and object direction in both areas, albeit more strongly in MSTd due to the greater strength of vestibular signals. Based on a marginalization technique, population decoding reveals that heading and object direction can be more effectively dissociated from MSTd responses than MSTl responses. Our findings help to clarify the respective contributions that MSTl and MSTd make to processing of object motion and self-motion, although our conclusions may be somewhat specific to the multipart moving objects that we employed.
机译：猕六尾皮质的多个区域参与视觉运动处理，但它们的相对功能角色仍然不清楚。内侧较好的时间（MST）区域通常被分成横向（MSTL）和背部（MSTD）细分，这些细分分别被认为参与处理对象运动和自动运动。而MSTD已经在处理视觉和非审美自动运动提示方面广泛研究，而关于MSTL中的自动运动信号很少，特别是非概视信号。此外，关于自动运动和对象运动信号如何在MSTL中交互以及如何与MSTD中的相互作用不同。我们使用相同的刺激比较了MSTL和MSTD中神经元的视觉和前庭标题调整。我们的调查结果表明，视觉和前庭标题信号在MSTL中较弱，而不是MSTD，这表明MSTL不太适合参加比MSTD的自动运动感知。我们还在两个领域测试了神经元，这些区域具有各种各样的对象运动和自动运动。我们的研究结果表明，前庭信号提高了在两个区域中的标题和物体方向的编码的可分离，这​​是由于前庭信号的强度更大的强度而在MSTD中更强烈。基于边缘化技术，人口解码揭示了比MSTL响应更有效地解离MSTD响应的标题和对象方向。我们的研究结果有助于澄清MSTL和MSTD对对象运动和自动运动来处理的各个贡献，尽管我们的结论可能有些特定于我们所用的多部分移动物体。

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