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5		-= A mesoscopic layered cortical network model =
	5	+= **The cortical mesocircuit model** =
	6	+
	7	+A layered network model covering 4x4 mm² of cortical surface area
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16		-= What can I find here? =
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	17	+= Overview =
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18		-* Notice how the table of contents on the right
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	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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22		-= Who has access? =
23		-
24		-Describe the audience of this collab.
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	22	+[[image:mesocircuit_sketch.png||height="333" width="500"]]
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30	30	{{box title="**Contents**"}}
31	31	{{toc/}}
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	34	+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.
	35	+
	36	+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.
	37	+
	38	+The neurons of each population are assigned random positions in two-dimensional layers and they are connected with distance-dependent connection probabilities and conduction delays.
	39	+
	40	+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.
	41	+
	42	+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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	45	+= Status of model development =
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	47	+The mesocircuit is still under development and the neither the code nor a peer-reviewed manuscript have been published, yet.
	48	+
	49	+To date, only a [[preprint>>https://arxiv.org/abs/1805.10235]] with detailed model documentation and preliminary results is available on arXiv.org.
	50	+
	51	+The Drive of this Collab provides access to a [[recent version of the model implementation>>https://wiki.ebrains.eu/bin/view/Collabs/mesocircuit/Drive]].
	52	+
	53	+The development of the mesocircuit model belongs to task "SGA2 T4.2.1 - Spiking mesoscale cortical models with spatial organization" and constitutes the [[component C2418>>https://plus.humanbrainproject.eu/components/2418]].
	54	+
	55	+The main contributors are Johanna Senk, Espen Hagen, Sacha J. van Albada and Markus Diesmann.
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