An axon initial segment is required for temporal precision in action potential encoding by neuronal populations.
An axon initial segment is required for temporal precision in action potential encoding by neuronal populations.
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DOI:
10.1126/sciadv.aau8621
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发表时间:
2018-11
期刊:
影响因子:
13.6
通讯作者:
Neef A
中科院分区:
文献类型:
--
作者:
Lazarov E;Dannemeyer M;Feulner B;Enderlein J;Gutnick MJ;Wolf F;Neef A
The key feature of the axon initial segment, clustering of ion channels, facilitates information encoding in neuronal networks. Central neurons initiate action potentials (APs) in the axon initial segment (AIS), a compartment characterized by a high concentration of voltage-dependent ion channels and specialized cytoskeletal anchoring proteins arranged in a regular nanoscale pattern. Although the AIS was a key evolutionary innovation in neurons, the functional benefits it confers are not clear. Using a mutation of the AIS cytoskeletal protein βIV-spectrin, we here establish an in vitro model of neurons with a perturbed AIS architecture that retains nanoscale order but loses the ability to maintain a high NaV density. Combining experiments and simulations, we show that a high NaV density in the AIS is not required for axonal AP initiation; it is, however, crucial for a high bandwidth of information encoding and AP timing precision. Our results provide the first experimental demonstration of axonal AP initiation without high axonal channel density and suggest that increasing the bandwidth of the neuronal code and, hence, the computational efficiency of network function, was a major benefit of the evolution of the AIS.
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影响因子:
3.7
作者:
Huang M;Volgushev M;Wolf F
通讯作者:
Wolf F
影响因子:
4.5
作者:
Jegla T;Nguyen MM;Feng C;Goetschius DJ;Luna E;van Rossum DB;Kamel B;Pisupati A;Milner ES;Rolls MM
通讯作者:
Rolls MM
DOI:
10.1098/rspb.2016.1151
发表时间:
2016-08-17
期刊:
Proceedings. Biological sciences
影响因子:
--
作者:
Gabbott SE;Donoghue PC;Sansom RS;Vinther J;Dolocan A;Purnell MA
通讯作者:
Purnell MA
影响因子:
64.5
作者:
Galiano MR;Jha S;Ho TS;Zhang C;Ogawa Y;Chang KJ;Stankewich MC;Mohler PJ;Rasband MN
通讯作者:
Rasband MN
DOI:
10.1523/jneurosci.4064-11.2011
发表时间:
2011-11-09
期刊:
The Journal of neuroscience : the official journal of the Society for Neuroscience
影响因子:
--
作者:
Grubb MS;Shu Y;Kuba H;Rasband MN;Wimmer VC;Bender KJ
通讯作者:
Bender KJ