The contribution of single synapses to sensory representation in vivo.
The contribution of single synapses to sensory representation in vivo.
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DOI:
10.1126/science.1158391
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发表时间:
2008-08-15
期刊:
影响因子:
--
通讯作者:
Margrie TW
中科院分区:
文献类型:
--
作者:
Arenz A;Silver RA;Schaefer AT;Margrie TW
The extent to which synaptic activity can signal a sensory stimulus limits the information available to a neuron. We determined the contribution of individual synapses to sensory representation by recording excitatory postsynaptic currents (EPSCs) in cerebellar granule cells during a time-varying, quantifiable vestibular stimulus. Vestibular-sensitive synapses faithfully reported direction and velocity, rather than position or acceleration of whole-body motion, via bidirectional modulation of EPSC frequency. The lack of short-term synaptic dynamics ensured a near perfect linear relationship between velocity and charge transfer, and as few as 100 synapses provided resolution approaching psychophysical limits. This indicates that highly accurate stimulus representation can be achieved by small networks and even within single neurons.
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影响因子:
2
作者:
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通讯作者:
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DOI:
10.1111/j.1749-6632.1981.tb30892.x
发表时间:
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影响因子:
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作者:
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