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Journal Article

Clusters of synaptic inputs on dendrites of layer 5 pyramidal cells in mouse visual cortex

MPS-Authors
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Gökce,  Onur
Department: Synapses-Circuits-Plasticity / Bonhoeffer, MPI of Neurobiology, Max Planck Society;

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Bonhoeffer,  Tobias
Department: Synapses-Circuits-Plasticity / Bonhoeffer, MPI of Neurobiology, Max Planck Society;

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Scheuss,  Volker
Department: Synapses-Circuits-Plasticity / Bonhoeffer, MPI of Neurobiology, Max Planck Society;

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Fulltext (public)

e09222-download.pdf
(Publisher version), 2MB

Supplementary Material (public)

elife09222-figures.pdf
(Supplementary material), 4MB

Citation

Gökce, O., Bonhoeffer, T., & Scheuss, V. (2016). Clusters of synaptic inputs on dendrites of layer 5 pyramidal cells in mouse visual cortex. eLife, 5: e09222. doi:10.7554/eLife.09222.


Cite as: http://hdl.handle.net/11858/00-001M-0000-002B-5367-7
Abstract
The spatial organization of synaptic inputs on the dendritic tree of cortical neurons plays a major role for dendritic integration and neural computations, yet, remarkably little is known about it. We mapped the spatial organization of glutamatergic synapses between layer 5 pyramidal cells by combining optogenetics and 2-photon calcium imaging in mouse neocortical slices. To mathematically characterize the organization of inputs we developed an approach based on combinatorial analysis of the likelihoods of specific synapse arrangements. We found that the synapses of intralaminar inputs form clusters on the basal dendrites of layer 5 pyramidal cells. These clusters contain 4 to 14 synapses within <= 30 mu m of dendrite. According to the spatiotemporal characteristics of synaptic summation, these numbers suggest that there will be non-linear dendritic integration of synaptic inputs during synchronous activation.