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5		-= **The cortical mesocircuit model** =
6		-
7		-A layered network model covering 4x4 mm² of cortical surface area
	5	+= A mesoscopic layered cortical network model =
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	13	+= [[image:mesocircuit_sketch.png]] =
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17		-= Overview =
	15	+= What can I find here? =
18	18
19		-The cortical mesocircuit model is a lateral extension of the microcircuit model published by [[Potjans & Diesmann (2014)>>https://doi.org/10.1093/cercor/bhs358]].
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21		-[[image:mesocircuit_sketch.png||height="277" width="340"]]
	21	+= Who has access? =
	22	+
	23	+Describe the audience of this collab.
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26	26	{{box title="**Contents**"}}
27	27	{{toc/}}
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33		-Like the microcircuit, the mesocircuit represents four layers of cortex, L2/3, L4, L5, and L6, each consisting of a population of excitatory neurons and a population of inhibitory neurons. External input can be provided by a thalamic population TC.
34		-
35		-The mesocircuit is a spatially structured network model covering 4x4 mm² of cortical surface area which is similar in size to multi-electrode arrays in use today.
36		-
37		-The neurons of each population are assigned random positions in 2-dimensional layers and they are connected with distance-dependent connection probabilities and conduction delays.
38		-
39		-The densities of neurons and local synapses in the network are assumed to be realistic, amounting to ~~1.2 million neurons and ~~5.5 billion synapses.
40		-
41		-The model accounts for both spiking activity simulated with [[NEST>>https://www.nest-simulator.org]] and local-field potentials relying on [[LFPy>>https://LFPy.rtfd.io]].
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44		-= Status of model development =
45		-
46		-The mesocircuit is still under development and the neither the code nor a peer-reviewed manuscript have been published, yet.
47		-
48		-To date, only a [[preprint>>https://arxiv.org/abs/1805.10235]] with detailed model documentation and preliminary results is available on ArXiv.
49		-
50		-The Drive of this Collab provides access to a [[recent version of the model implementation>>https://wiki.ebrains.eu/bin/view/Collabs/mesocircuit/Drive]].
51		-
52		-The development of the mesocircuit model belongs to task "T4.2.1 - Spiking mesoscale cortical models with spatial organization" and constitutes the [[component C2418>>https://plus.humanbrainproject.eu/components/2418]].
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