Control of submillisecond synaptic timing in binaural coincidence detectors by Kv1 channels

Abstract

Neurons in the medial superior olive process sound-localization cues via binaural coincidence detection, in which excitatory synaptic inputs from each ear are segregated onto different branches of a bipolar dendritic structure and summed at the soma and axon with submillisecond time resolution. Although synaptic timing and dynamics critically shape this computation, synaptic interactions with intrinsic ion channels have received less attention. Using paired somatic and dendritic patch-clamp recordings in gerbil brainstem slices together with compartmental modeling, we found that activation of Kv1 channels by dendritic excitatory postsynaptic potentials (EPSPs) accelerated membrane repolarization in a voltage-dependent manner and actively improved the time resolution of synaptic integration. We found that a somatically biased gradient of Kv1 channels underlies the degree of compensation for passive cable filtering during propagation of EPSPs in dendrites. Thus, both the spatial distribution and properties of Kv1 channels are important for preserving binaural synaptic timing.

DOI: 10.1038/nn.2530

Extracted Key Phrases

8 Figures and Tables

02040608020102011201220132014201520162017
Citations per Year

254 Citations

Semantic Scholar estimates that this publication has 254 citations based on the available data.

See our FAQ for additional information.

Cite this paper

@article{Mathews2010ControlOS, title={Control of submillisecond synaptic timing in binaural coincidence detectors by Kv1 channels}, author={Paul J. Mathews and Pablo E. Jercog and John Rinzel and Luisa L. Scott and Nace L Golding}, journal={Nature Neuroscience}, year={2010}, volume={13}, pages={601-609} }