Real-time Electrophysiology: Using Closed-loop Protocols to Probe Neuronal Dynamics and Beyond

Daniele Linaro; Jo&#227;o Couto; Michele Giugliano

doi:10.3791/52320

En tiempo real Electrofisiología: Usando protocolos de bucle cerrado para sondear neuronales Diná...

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JoVE Journal Neuroscience

Real-time Electrophysiology: Using Closed-loop Protocols to Probe Neuronal Dynamics and Beyond

En tiempo real Electrofisiología: Usando protocolos de bucle cerrado para sondear neuronales Dinámica y allá

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08:08 min

June 24, 2015

DOI: 10.3791/52320-v

Daniele Linaro¹, João Couto¹, Michele Giugliano¹

¹Department of Biomedical Sciences,University of Antwerp

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Overview

This study presents a method for performing in vitro dynamic clamp in cortical neurons using the LCG software toolbox. The approach allows for the application of automated electrophysiological protocols to characterize cortical neurons effectively.

Key Study Components

Area of Science

Electrophysiology
Neuroscience
Cortical neuron dynamics

Background

Closed-loop protocols are increasingly used in electrophysiology.
Dynamic clamp techniques allow for simulation of synaptic events.
Characterization of cortical neurons is essential for understanding their function.
Existing methods lack the flexibility for complex experimental workflows.

Purpose of Study

To demonstrate a versatile method for dynamic clamp in cortical neurons.
To automate electrophysiological protocols for standard characterization.
To simulate excitatory and inhibitory synaptic events in vitro.

Methods Used

Preparation of rat somatosensory cortex slices.
Patch clamp recordings from parametal cells.
Application of automated electrophysiological protocols.
Injection of simulated synaptic events to modulate neuronal gain.

Main Results

The method allows embedding of experimental recordings into complex workflows.
Background synaptic injection effectively modulates cortical cell gain.
Standard characterization aids in comparisons across different cell types.
The approach is simple, versatile, and cost-effective.

Conclusions

This technique enhances the study of cortical neuron dynamics.
It provides a framework for integrating various electrophysiological protocols.
The findings contribute to a better understanding of neuronal behavior in vitro.

Frequently Asked Questions

What is dynamic clamp?

Dynamic clamp is a technique that allows for the real-time simulation of synaptic inputs in neurons.

How does this method improve electrophysiological studies?

It allows for the integration of multiple experimental protocols, enhancing the flexibility and depth of analysis.

What are the advantages of using LCG software?

LCG software is freely available and supports complex electrophysiological workflows.

What type of neurons were studied?

Cortical pyramidal neurons from rat somatosensory cortex were the focus of this study.

Can this method be applied to other types of neurons?

Yes, the approach can be adapted for various neuronal types for comparative studies.

What is the significance of background synaptic injection?

It modulates the gain of cortical cells, mimicking in vivo conditions and enhancing experimental relevance.

Los protocolos de bucle cerrado están cada vez más extendidos en la electrofisiología moderna. Presentamos una forma sencilla, versátil y económica de realizar protocolos electrofisiológicos complejos en neuronas piramidales corticales in vitro, utilizando un ordenador de sobremesa y una placa de adquisición digital.

El objetivo general del siguiente experimento es realizar un pinzamiento dinámico in vitro en neuronas corticales utilizando la caja de herramientas de software disponible gratuitamente, LCG. Esto se logra mediante la preparación de cortezas de la corteza somatosensorial de rata para las grabaciones de la pinza del parche de las células parametálicas. Como segundo paso, se aplica una serie de protocolos electrofisiológicos automatizados a la célula registrada, que proporciona una caracterización estándar de la célula que será útil para posteriores análisis y comparaciones entre tipos de células.

A continuación, se simula la inyección de eventos sinápticos excitatorios e inhibidores. Con el fin de recrear el estado de alta conductividad experimentado por las neuronas neocorticales in vivo, los resultados muestran cómo la inyección sináptica de fondo modula la ganancia de las células corticales. La principal ventaja de esta técnica sobre los métodos existentes es la posibilidad de incrustar grabaciones experimentales en flujos de trabajo más complicados utilizando, por ejemplo, el resultado de un protocolo experimental como entrada a otro protocolo.

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