analytical processing of binary mixture information by olfactory bulb glomeruli分析处理的二进制混合信息嗅球肾小球.pdfVIP

analytical processing of binary mixture information by olfactory bulb glomeruli分析处理的二进制混合信息嗅球肾小球.pdf

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analytical processing of binary mixture information by olfactory bulb glomeruli分析处理的二进制混合信息嗅球肾小球

Analytical Processing of Binary Mixture Information by Olfactory Bulb Glomeruli Max L. Fletcher*¤ Department of Neurobiology and Anatomy, University of Texas Medical School, Houston, Texas, United States of America Abstract Odors are rarely composed of a single compound, but rather contain a large and complex variety of chemical components. Often, these mixtures are perceived as having unique qualities that can be quite different than the combination of their components. In many cases, a majority of the components of a mixture cannot be individually identified. This synthetic processing of odor information suggests that individual component representations of the mixture must interact somewhere along the olfactory pathway. The anatomical nature of sensory neuron input into segregated glomeruli with the bulb suggests that initial input of odor information into the bulb is analytic. However, a large network of interneurons within the olfactory bulb could allow for mixture interactions via mechanisms such as lateral inhibition. Currently in mammals, it is unclear if postsynaptic mitral/tufted cell glomerular mixture responses reflect the analytical mixture input, or provide the initial basis for synthetic processing with the olfactory system. To address this, olfactory bulb glomerular binary mixture representations were compared to representations of each component using transgenic mice expressing the calcium indicator G-CaMP2 in olfactory bulb mitral/tufted cells. Overall, dorsal surface mixture representations showed little mixture interaction and often appeared as a simple combination of the component representations. Based on this, it is concluded that dorsal surface glomerular mixture representations remain largely analytical with nearly all component information preserved. Citation: Fletcher ML (2011) Analytical Processing of Binary Mixture Informat

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