Visual processing in the central bee brain.
Visual processing in the central bee brain.
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DOI：
10.1523/jneurosci.1325-09.2009
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发表时间：
2009-08-12
期刊：
影响因子：
--
通讯作者：
Gronenberg W
中科院分区：
文献类型：
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作者：
Paulk AC;Dacks AM;Phillips-Portillo J;Fellous JM;Gronenberg W
视觉场景包含大量信息，神经系统从中提取与行为相关的线索。在大多数模型系统中，很少有人知道的视觉信息的转换，因为它发生沿着视觉路径。我们研究了视觉信息是如何在生理上转化的，因为它是从眼睛传达到高阶大脑中心使用大黄蜂，这是众所周知的视觉能力。我们记录了大黄蜂大脑中央（外侧前脑）30个神经元的细胞内活体，并将这些神经元与沿着视觉通路的更远侧区域（即髓质和小叶）的132个神经元进行了比较。在这三个大脑区域（髓质、小叶和中央脑）中，我们研究了神经元的分支模式与它们主要对颜色的反应之间的相关性，但也研究了它们对运动刺激的反应。投射到前中枢的视觉神经元一般是颜色敏感的，而投射到后中枢的神经元主要是运动敏感的。这些领域之间的时间响应特性显着不同，随着视觉信息处理从外周到中枢的进展，在整个试验中尖峰时间精度的增加和平均可靠尖峰的减少。这些数据表明，神经元沿着视觉通路到中央大脑不仅是隔离的物理特征的刺激（如颜色和运动），但也不同的方式，他们编码的刺激，可能允许有效的并行处理发生。
Visual scenes comprise enormous amounts of information from which nervous systems extract behaviorally relevant cues. In most model systems, little is known about the transformation of visual information as it occurs along visual pathways. We examined how visual information is transformed physiologically as it is communicated from the eye to higher order brain centers using bumblebees, which are known for their visual capabilities. We recorded intracellularly in vivo from thirty neurons in the central bumblebee brain (the lateral protocerebrum) and compared these neurons to 132 neurons from more distal areas along the visual pathway, namely the medulla and the lobula. In these three brain regions (medulla, lobula and central brain), we examined correlations between the neurons’ branching patterns and their responses primarily to color, but also to motion stimuli. Visual neurons projecting to the anterior central brain were generally color sensitive, while neurons projecting to the posterior central brain were predominantly motion sensitive. The temporal response properties differed significantly between these areas, with an increase in spike time precision across trials and a decrease in average reliable spiking as visual information processing progressed from the periphery to the central brain. These data suggest that neurons along the visual pathway to the central brain are not only segregated with regard to the physical features of the stimuli (e.g. color and motion), but also differ in the way they encode stimuli, possibly to allow for efficient parallel processing to occur.