The contribution of single synapses to sensory representation in vivo.

The contribution of single synapses to sensory representation in vivo.
复制标题

DOI:
10.1126/science.1158391
复制
发表时间:
2008-08-15
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Margrie TW
Margrie TW
中科院分区:
其他
文献类型:
--
作者:
Arenz A;Silver RA;Schaefer AT;Margrie TW

文献摘要

参考文献

被引文献

相似文献

突触活动可以发出感觉刺激信号的程度限制了神经元可用的信息。我们通过记录小脑颗粒细胞中的兴奋性突触后电流(EPSC)来确定单个突触对感觉表征的贡献,该电流在随时间变化的、可量化的前庭刺激期间。前庭敏感突触通过EPSC频率的双向调制忠实地报告方向和速度,而不是全身运动的位置或加速度。缺乏短期突触动力学确保了速度和电荷转移之间近乎完美的线性关系,并且只有100个突触提供了接近心理物理极限的分辨率。这表明,高度准确的刺激表示可以通过小网络甚至在单个神经元内实现。
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.
DOI: 10.1007/s002210100790
发表时间: 2001-09-01
影响因子: 2
作者:
Diño, MR;Perachio, AA;Mugnaini, E
通讯作者: Mugnaini, E
DOI: 10.1523/jneurosci.23-14-06074.2003
发表时间: 2003-07-09
影响因子: 5.3
作者:
Cathala, L;Brickley, S;Farrant, M
通讯作者: Farrant, M
DOI: 10.1111/j.1749-6632.1981.tb30892.x
发表时间: 1981-01-01
影响因子: 5.2
作者:
NODA, H
通讯作者: NODA, H
DOI: 10.1016/s0896-6273(02)00787-0
发表时间: 2002-08-01
期刊: NEURON
影响因子: 16.2
作者:
DiGregorio, DA;Nusser, Z;Silver, RA
通讯作者: Silver, RA