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Updated: May 3, 2026

Surgical Training for the Implantation of Neocortical Microelectrode Arrays Using a Formaldehyde-fixed Human Cadaver Model

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Reconstruction and Simulation of Neocortical Microcircuitry.

Henry Markram¹, Eilif Muller², Srikanth Ramaswamy²

¹Blue Brain Project, École polytechnique fédérale de Lausanne (EPFL) Biotech Campus, 1202 Geneva, Switzerland; Laboratory of Neural Microcircuitry, Brain Mind Institute, EPFL, 1015 Lausanne, Switzerland.

|October 10, 2015

Summary

This summary is machine-generated.

Researchers digitally reconstructed a juvenile rat

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Area of Science:

Neuroscience
Computational Biology
Systems Neuroscience

Background:

Understanding the brain's microcircuitry is crucial for deciphering neural computation.
Previous reconstructions were limited in scale and biological detail.

Purpose of the Study:

To create a detailed digital reconstruction of the rat somatosensory cortex microcircuitry.
To simulate network dynamics and explore information processing strategies.

Main Methods:

Algorithmic reconstruction based on cellular and synaptic principles.
Integration of anatomical data and patch-clamp electrophysiology.
Large-scale network simulations of ~31,000 neurons and ~37 million synapses.

Main Results:

A first-draft digital reconstruction of 0.29 mm(3) of rat somatosensory cortex.
Identification of 55 layer-specific morphological and 207 morpho-electrical neuron subtypes.
Simulations accurately reproduced experimental findings and revealed a spectrum of network states.

Conclusions:

The digital reconstruction provides a framework for studying neural circuits.
Dynamic network states support diverse information processing strategies.
This approach enables in silico experimentation to understand brain function.