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首页> 外文期刊>The European Journal of Neuroscience >Cortical representation of acoustic motion in the rufous horseshoe bat, Rhinolophus rouxi.
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Cortical representation of acoustic motion in the rufous horseshoe bat, Rhinolophus rouxi.

机译：在红褐色的马蹄蝙蝠（Rhinolophus rouxi）中声学运动的皮质表示。

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摘要

Responses of neurons to apparent auditory motion in the azimuth were recorded in three different fields of auditory cortex of the rufous horseshoe bat. Motion was simulated using successive stimuli with dynamically changing interaural intensity differences presented via earphones. Seventy-one percent of sampled neurons were motion-direction-sensitive. Two types of responses could be distinguished. Thirty-four percent of neurons showed a directional preference exhibiting stronger responses to one direction of motion. Fifty-seven percent of neurons responded with a shift of spatial receptive field position depending on direction of motion. Both effects could occur in the same neuron depending on the parameters of apparent motion. Most neurons with contralateral receptive fields exhibited directional preference only with motion entering the receptive field from the opposite direction. Receptive field shifts were opposite to the direction of motion. Specific combinations of spatiotemporal parameters determined the motion-direction-sensitive responses. Velocity was not encoded as a specific parameter. Temporal parameters of motion and azimuth position of the moving sound source were differentially encoded by neurons in different fields of auditory cortex. Neurons with a directional preference in the dorsal fields can encode motion with short interpulse intervals, whereas direction-preferring neurons in the primary field can best encode motion with medium interpulse intervals. Furthermore, neurons with a directional preference in the dorsal fields are specialized for encoding motion in the midfield of azimuth, whereas direction-preferring neurons in the primary field can encode motion in lateral positions. The results suggest that motion information is differentially processed in different fields of the auditory cortex of the rufous horseshoe bat.
机译：在红褐色马蹄蝙蝠的听觉皮层的三个不同区域中记录了神经元对方位上明显听觉运动的反应。使用连续刺激模拟运动，并通过耳机呈现动态变化的耳间强度差异。 71％的采样神经元对运动方向敏感。可以区分两种类型的响应。 34％的神经元表现出方向性偏好，表现出对一个运动方向的更强响应。根据运动方向，百分之五十七的神经元响应于空间感受野位置的变化。根据视在运动的参数，两种作用都可能在同一神经元中发生。具有对侧感受野的大多数神经元仅在运动从相反方向进入感受野时才表现出方向性优先。感受性场移与运动方向相反。时空参数的特定组合确定了运动方向敏感的响应。速度未编码为特定参数。运动的时间参数和移动声源的方位角位置由听觉皮层不同区域中的神经元进行差分编码。在背场中具有方向性偏好的神经元可以对短脉冲间隔的运动进行编码，而在主场中优先于方向的神经元可以对中脉冲间隔的运动进行最佳编码。此外，在背场中具有方向性优先的神经元专门用于编码方位中场中的运动，而在主场中优先于方向的神经元可以对横向位置中的运动进行编码。结果表明，在红褐色马蹄蝠的听觉皮层的不同区域中，运动信息得到了不同的处理。

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