Publications by Rodrigo de Campos Perin

Of mice and men: Dendritic architecture differentiates human from mouse neuronal networks

Kathryn Hess Bellwald, Henry Markram, Rodrigo de Campos Perin, Alexis Arnaudon, Julie Meystre, Maurizio Ferdinando Pezzoli, Ying Shi, Lida Kanari, Natali Barros Zulaica

The organizational principles that distinguish the human brain from other species have been a long-standing enigma in neuroscience. Focusing on the uniquely evolved human cortical layers 2 and 3, we computationally reconstruct the cortical architecture for ...

2025

Fear learning induces synaptic potentiation between engram neurons in the rat lateral amygdala

Henry Markram, Rodrigo de Campos Perin

The lateral amygdala (LA) encodes fear memories by potentiating sensory inputs associated with threats and, in the process, recruits 10-30% of its neurons per fear memory engram. However, how the local network within the LA processes this information and w ...

Nature Portfolio2024

Cell density quantification of high resolution Nissl images of the juvenile rat brain

Henry Markram, Olivier Burri, Rodrigo de Campos Perin, Julie Meystre, Daniel Keller, Ying Shi

Copyright © 2024 Meystre, Jacquemier, Burri, Zsolnai, Frank, Vieira, Shi, Perin, Keller and Markram.Nissl histology underpins our understanding of brain anatomy and architecture. Despite its importance, no high-resolution datasets are currently available i ...

2024

Thalamic control of sensory processing and spindles in a biophysical somatosensory thalamoreticular circuit model of wakefulness and sleep

Henry Markram, Rodrigo de Campos Perin, James Gonzalo King, Rajnish Ranjan, Grigori Chevtchenko, Sean Lewis Hill, Jayakrishnan Harikrishnavilas Raveendran Nair, Michael Reimann, Ying Shi, Marwan Muhammad Ahmed Abdellah, Jean-Denis Georges Emile Courcol, Werner Alfons Hilda Van Geit, Adrien Christian Fleury, Michael Emiel Gevaert, Pramod Shivaji Kumbhar, Oren Amsalem, Cyrille Pierre Henri Favreau, Mohameth François Sy, Samuel Claude Kerrien, Elisabetta Iavarone, Christian O'Reilly, Genrich Ivaska, András Ecker, Anna-Kristin Kaufmann, Benoît Jean-Albert Coste, Ioannis Magkanaris, Matthias Wolf, Marine Laure Bertschy, Patrycja Lurie, Mustafa Anil Tuncel, Fabien Petitjean, Nadir Roman Guerrero, Liviu Soltuzu, Alexander Désiré Ulbrich, Polina Litvak, Vignayanandam Ravindernath Muddapu, Joni Henrikki Herttuainen

2023

A calcium-based plasticity model for predicting long-term potentiation and depression in the neocortex

Henry Markram, Vincent Delattre, Rodrigo de Campos Perin, James Gonzalo King, Eilif Benjamin Muller, Marwan Muhammad Ahmed Abdellah, Werner Alfons Hilda Van Geit, Giuseppe Chindemi, Aurélien Tristan Jaquier, Pramod Shivaji Kumbhar, Christian Andreas Rössert, András Ecker, Mustafa Anil Tuncel

Pyramidal cells (PCs) form the backbone of the layered structure of the neocortex, and plasticity of their synapses is thought to underlie learning in the brain. However, such long-term synaptic changes have been experimentally characterized between only a ...

Nature Portfolio2022

Estimating the Readily-Releasable Vesicle Pool Size at Synaptic Connections in the Neocortex

Henry Markram, Rodrigo de Campos Perin, Srikanth Ramaswamy, Eilif Benjamin Muller, Giuseppe Chindemi, Natali Barros Zulaica

Previous studies based on the 'Quantal Model' for synaptic transmission suggest that neurotransmitter release is mediated by a single release site at individual synaptic contacts in the neocortex. However, recent studies seem to contradict this hypothesis ...

2019

Objective Morphological Classification of Neocortical Pyramidal Cells

Kathryn Hess Bellwald, Henry Markram, Rodrigo de Campos Perin, Srikanth Ramaswamy, Julie Meystre, Yun Wang, Ying Shi, Marwan Muhammad Ahmed Abdellah, Lida Kanari

A consensus on the number of morphologically different types of pyramidal cells (PCs) in the neocortex has not yet been reached, despite over a century of anatomical studies, due to the lack of agreement on the subjective classifications of neuron types, w ...

Oxford University Press (OUP)2019

On the Structure of Cortical Microcircuits Inferred from Small Sample Sizes

Rodrigo de Campos Perin

The structure in cortical microcircuits deviates from what would be expected in a purely random network, which has been seen as evidence of clustering. To address this issue, we sought to reproduce the nonrandom features of cortical circuits by considering ...

Soc Neuroscience2017

Cliques of Neurons Bound into Cavities Provide a Missing Link between Structure and Function

Kathryn Hess Bellwald, Henry Markram, Rodrigo de Campos Perin, Michael Reimann, Giuseppe Chindemi, Ran Levi, Max Christian Nolte, Pawel Tadeusz Dlotko, Katharine Felicity Turner, Martina Scolamiero

The lack of a formal link between neural network structure and its emergent function has hampered our understanding of how the brain processes information. We have now come closer to describing such a link by taking the direction of synaptic transmission i ...

Frontiers Media Sa2017

Cell-type- and activity-dependent extracellular correlates of intracellular spiking

Henry Markram, Rodrigo de Campos Perin, Constantinos Anastassiou

Despite decades of extracellular action potential (EAP) recordings monitoring brain activity, the biophysical origin and inherent variability of these signals remains enigmatic. We performed whole-cell patch recordings of excitatory and inhibitory neurons ...

2015

Reconstruction and Simulation of Neocortical Microcircuitry

Nenad Buncic, Jean-Vincent Le Bé, Selim Arsever, Henry Markram, Gilad Silberberg, Sébastien Lasserre, Vincent Delattre, Raphael Dumusc, Rodrigo de Campos Perin, Imad Riachi, Thomas Berger, Felix Schürmann, James Gonzalo King, Rajnish Ranjan, Srikanth Ramaswamy, Michael Lee Hines, Sean Lewis Hill, Juan Bautista Hernando Vieites, Georges Khazen, Shruti Muralidhar, Anastasia Ailamaki, Eilif Benjamin Muller, Farhan Tauheed, Jean Pierre Ghobril, Julie Meystre, Daniel Keller, Idan Segev, Michael Reimann, Thomas Heinis, John Richard Walker, Martin Telefont, Yun Wang, Ying Shi, Joseph William Graham, Marwan Muhammad Ahmed Abdellah, Julian Charles Shillcock, Jean-Denis Georges Emile Courcol, Ahmet Bilgili, Werner Alfons Hilda Van Geit, Athanassia Chalimourda, , , , , , , , , , , , , , , , , , , , , , , , , , , ,

Computing the size and number of neuronal clusters in local circuits

Henry Markram, Rodrigo de Campos Perin, Martin Telefont

The organization of connectivity in neuronal networks is fundamental to understanding the activity and function of neural networks and information processing in the brain. Recent studies show that the neocortex is not only organized in columns and layers b ...

Frontiers Research Foundation2013

A Biophysically Detailed Model of Neocortical Local Field Potentials Predicts the Critical Role of Active Membrane Currents

Henry Markram, Rodrigo de Campos Perin, Sean Lewis Hill, Michael Reimann

Brain activity generates extracellular voltage fluctuations recorded as local field potentials (LFPs). It is known that the relevant microvariables, the ionic currents across membranes, jointly generate the macrovariables, the extracellular voltage, but ne ...

Elsevier2013

A computer-assisted multi-electrode patch-clamp system

Henry Markram, Rodrigo de Campos Perin

The patch-clamp technique is today the most well-established method for recording electrical activity from individual neurons or their subcellular compartments. Nevertheless, achieving stable recordings, even from individual cells, remains a time-consuming ...

Journal of Visualized Experiments2013

A synaptic organizing principle for cortical neuronal groups

Henry Markram, Rodrigo de Campos Perin, Thomas Berger

Neuronal circuitry is often considered a clean slate that can be dynamically and arbitrarily molded by experience. However, when we investigated synaptic connectivity in groups of pyramidal neurons in the neocortex, we found that both connectivity and syna ...

2011

Organizing neural networks

Henry Markram, Rodrigo de Campos Perin, Thomas Berger

Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for organizing trained and untrained neural networks. In one aspect, a neural network device includes a collection of node assemblies interconnected by betwe ...

2011

Ephaptic coupling of cortical neurons

Henry Markram, Rodrigo de Campos Perin, Constantinos Anastassiou

The electrochemical processes that underlie neural function manifest themselves in ceaseless spatiotemporal field fluctuations. However, extracellular fields feed back onto the electric potential across the neuronal membrane via ephaptic coupling, independ ...

2011

Innate neural assemblies for lego memory

Henry Markram, Rodrigo de Campos Perin

2011

Brief Bursts Self-Inhibit and Correlate the Pyramidal Network

Henry Markram, Gilad Silberberg, Rodrigo de Campos Perin, Thomas Berger

Inhibitory pathways are an essential component in the function of the neocortical microcircuitry. Despite the relatively small fraction of inhibitory neurons in the neocortex, these neurons are strongly activated due to their high connectivity rate and the ...

Public Library of Science2010

Emergent Dynamics in Neocortical Microcircuits

Rodrigo de Campos Perin

Interactions among neurons can take place in a wide variety of forms. It is the goal of this thesis to investigate the properties and implications of a number of these interactions that we believe are relevant for information processing in the brain. Neuro ...

EPFL2010