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首页> 外文期刊>The Journal of Neuroscience: The Official Journal of the Society for Neuroscience >Function and coding in the blowfly H1 neuron during naturalistic optic flow.
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Function and coding in the blowfly H1 neuron during naturalistic optic flow.

机译：在自然光流中，蝇fly H1神经元的功能和编码。

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摘要

Naturalistic stimuli, reconstructed from measured eye movements of flying blowflies, were replayed on a panoramic stimulus device. The directional movement-sensitive H1 neuron was recorded from blowflies watching these stimuli. The response of the H1 neuron is dominated by the response to fast saccadic turns into one direction. The response between saccades is mostly inhibited by the front-to-back optic flow caused by the forward translation during flight. To unravel the functional significance of the H1 neuron, we replayed, in addition to the original behaviorally generated stimulus, two targeted stimulus modifications: (1) a stimulus in which flow resulting from translation was removed (this stimulus produced strong intersaccadic responses); and (2) a stimulus in which the saccades were removed by assuming that the head follows the smooth flight trajectory (this stimulus produced alternating zero or nearly saturating spike rates). The responses to the two modified stimuli are strongly different from the response to the original stimulus, showing the importance of translation and saccades for the H1 response to natural optic flow. The response to the original stimulus thus suggests a double function for the H1 neuron, assisting two major classes of movement-sensitive output neurons targeted by H1. First, its strong response to saccades may function as a saccadic suppressor (via one of its target neurons) for cells involved in figure-ground discrimination. Second, its intersaccadic response may increase the signal-to-noise ratio (SNR) of wide-field neurons involved in detecting translational optic flow between saccades, in particular when flying speeds are low or when object distances are large.
机译：通过测量蝇蝇的眼动来重建自然刺激，在全景刺激设备上进行回放。观察到这些刺激的苍蝇记录了定向​​运动敏感的H1神经元。 H1神经元的反应主要由快速向一个方向转变的反应所决定。扫视之间的响应主要受飞行过程中前向平移引起的前后光学流动的抑制。为了揭示H1神经元的功能重要性，除了原始的行为产生的刺激之外，我们还回放了两个有针对性的刺激修饰：（1）一种消除了翻译产生的血流的刺激（此刺激产生强烈的声际反应）; （2）通过假定头部遵循平滑的飞行轨迹来消除扫视的刺激（此刺激产生交替的零或接近饱和的尖峰频率）。对这两种修饰刺激的响应与对原始刺激的响应有很大不同，显示了平移和扫视对于H1对自然光学流的响应的重要性。因此，对原始刺激的反应表明H1神经元具有双重功能，可协助H1靶向的两​​大类运动敏感输出神经元。首先，它对扫视的强烈反应可能（通过其目标神经元之一）对涉及图底判别的细胞起到了巡视抑制器的作用。其次，其跨声响应可能会增加参与检测扫视点之间的平移光学流的广域神经元的信噪比（SNR），尤其是在飞行速度较低或物距较大时。

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