Cortical representations of olfactory input by trans-synaptic tracing.
Cortical representations of olfactory input by trans-synaptic tracing.
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DOI:
10.1038/nature09714
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发表时间:
2011-04-14
期刊:
影响因子:
64.8
通讯作者:
Luo, Liqun
中科院分区:
文献类型:
--
作者:
Miyamichi, Kazunari;Amat, Fernando;Moussavi, Farshid;Wang, Chen;Wickersham, Ian;Wall, Nicholas R.;Taniguchi, Hiroki;Tasic, Bosiljka;Huang, Z. Josh;He, Zhigang;Callaway, Edward M.;Horowitz, Mark A.;Luo, Liqun
In the mouse, each class of olfactory receptor neurons expressing a given odorant receptor converges their axons onto two specific glomeruli in the olfactory bulb (OB), thereby creating an odor map. How is this map represented in the olfactory cortex? Here we combine rabies virus-dependent retrograde mono-transsynaptic labeling with genetics to control the location, number and type of ‘starter’ cortical neurons, from which we trace their presynaptic neurons. We find that individual cortical neurons receive input from multiple mitral cells representing broadly distributed glomeruli. Different cortical areas represent the OB input differently. For example, the cortical amygdala preferentially receives dorsal OB input, whereas the piriform cortex samples the whole OB without obvious bias. These differences likely reflect different functions of these cortical areas in mediating innate odor preference or associative memory. The transsynaptic labeling method described here should be widely applicable to mapping connections throughout the mouse nervous system.
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