The organization of submodality-specific touch afferent inputs in the vibrissa column.

The organization of submodality-specific touch afferent inputs in the vibrissa column.
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DOI:
10.1016/j.celrep.2013.08.051
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发表时间:
2013-10-17
期刊:
影响因子:
8.8
通讯作者:
Wang F
Wang F
中科院分区:
生物学1区
文献类型:
--
作者:
Sakurai K;Akiyama M;Cai B;Scott A;Han BX;Takatoh J;Sigrist M;Arber S;Wang F

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The rodent tactile vibrissae are innervated by several different types of touch sensory neurons. The central afferents of all touch neurons from one vibrissa collectively project to a columnar structure called barrelette in brainstem. Delineating how distinct types of sensors connect to second-order neurons within each barrelette is critical for understanding tactile information coding and processing. Using genetic and viral techniques, we selectively labeled slowly-adapting (SA) mechanosensory neurons, rapidly-adapting (RA) mechanosensory neurons, afferent synapses, and second-order projection neurons with different “colors”, respectively, to examine the connectivity. We discovered that within each vibrissa column, individual sensory neurons project collaterals to multiple distributed locations; inputs from SA and RA afferents are spatially intermixed without any discernible stereotypy or topography; second-order projection neurons receive convergent SA and RA inputs. Our findings reveal a “one-to-many and many-to-one” connectivity scheme and the circuit architecture for tactile information processing at the first-order synapses.
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