Parallel Processing via a Dual Olfactory Pathway in the Honeybee
Parallel Processing via a Dual Olfactory Pathway in the Honeybee
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DOI：
10.1523/jneurosci.4268-12.2013
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发表时间：
2013-02-06
影响因子：
5.3
通讯作者：
Roessler, Wolfgang
中科院分区：
文献类型：
--
作者：
Brill, Martin F.;Rosenbaum, Tobias;Roessler, Wolfgang
在自然环境中，动物面临着复杂且高度动态的嗅觉输入。因此，脊椎动物和无脊椎动物都需要快速可靠的嗅觉信息处理。并行处理已被证明可以提高其他感觉系统的处理速度和能力，其特征在于沿着沿着感觉信息流提取不同的刺激参数。蜜蜂具有复杂的嗅觉系统，具有独特的神经元结构：双嗅觉通路包括内侧投射神经元（PN）触角叶（AL）前脑输出道（m-APT）和外侧PNAL输出道（l-APT），连接嗅觉叶与高级脑中心。我们问这种神经元结构是否为并行处理，并采用了一种新的技术，同时从两个道多单元记录。结果显示，响应配置文件从大量的PN的两个大片的花卉，信息素，和生物相关的气味混合物测试多个试验。来自两个道的PN响应于所有测试的气味，但具有不同的特征，表明类似的气味的平行处理。两个PN束被广泛重叠的响应曲线激活，这是并行处理的要求。的l-APT PNs有广泛的响应曲线，建议广义的编码特性，而m-APTPNs的响应相对较弱，频率较低，表明更高的气味特异性。比较内和跨道的反应lavenance揭示气味依赖lavenance。我们建议，通过蜜蜂双嗅觉通路的并行处理提供了增强的气味处理能力，服务复杂的气味感知和嗅觉需求与复杂的嗅觉世界，这种社会昆虫。
In their natural environment, animals face complex and highly dynamic olfactory input. Thus vertebrates as well as invertebrates require fast and reliable processing of olfactory information. Parallel processing has been shown to improve processing speed and power in other sensory systems and is characterized by extraction of different stimulus parameters along parallel sensory information streams. Honeybees possess an elaborate olfactory system with unique neuronal architecture: a dual olfactory pathway comprising a medial projection-neuron (PN) antennal lobe (AL) protocerebral output tract (m-APT) and a lateral PN AL output tract (l-APT) connecting the olfactory lobes with higher-order brain centers. We asked whether this neuronal architecture serves parallel processing and employed a novel technique for simultaneous multiunit recordings from both tracts. The results revealed response profiles from a high number of PNs of both tracts to floral, pheromonal, and biologically relevant odor mixtures tested over multiple trials. PNs from both tracts responded to all tested odors, but with different characteristics indicating parallel processing of similar odors. Both PN tracts were activated by widely overlapping response profiles, which is a requirement for parallel processing. The l-APT PNs had broad response profiles suggesting generalized coding properties, whereas the responses of m-APTPNs were comparatively weaker and less frequent, indicating higher odor specificity. Comparison of response latencies within and across tracts revealed odor-dependent latencies. We suggest that parallel processing via the honeybee dual olfactory pathway provides enhanced odor processing capabilities serving sophisticated odor perception and olfactory demands associated with a complex olfactory world of this social insect.