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The Resting Membrane Potential

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Resting Membrane Potential01:24

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The relative difference in electrical charge, or voltage, between the inside and the outside of a cell membrane, is called the membrane potential. It is generated by differences in permeability of the membrane to various ions and the concentrations of these ions across the membrane.
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Simultaneous Electrophysiological Recording and Micro-injections of Inhibitory Agents in the Rodent Brain
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Neuroelectrophysiology-compatible electrolytic lesioning.

Iliana E Bray1, Stephen E Clarke2, Kerriann M Casey3

  • 1Department of Electrical Engineering, Stanford University, Stanford, United States.

Elife
|September 11, 2024
PubMed
Summary

Researchers developed a new method for creating precise brain lesions using existing electrode probes. This technique allows for simultaneous electrophysiology, enabling causal studies of neural circuits and neuron loss effects.

Keywords:
O. ariesS. domesticuslesionsmicroelectrode arrayneuroelectrophysiologyneurosciencerhesus macaquesingle-unit recording

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Area of Science:

  • Neuroscience
  • Systems Neuroscience
  • Electrophysiology

Background:

  • Lesion studies are crucial for understanding brain-behavior relationships.
  • Integrating lesion techniques with multielectrode recordings can offer deeper insights.
  • Existing methods may be disruptive or lack precision.

Purpose of the Study:

  • To present and validate a novel platform for creating electrolytic brain lesions.
  • To enable simultaneous neuroelectrophysiology and lesioning.
  • To facilitate causal investigations of neural circuits.

Main Methods:

  • Utilized chronically implanted intracortical multielectrode probes.
  • Developed a custom current source for controlled, repeatable electrolytic lesions.
  • Validated the technique using histology, electrical recordings, and electrophysiological data.

Main Results:

  • Achieved millimeter precision in lesion extent and submillimeter precision in location.
  • Demonstrated the ability to record single-unit activity post-lesioning.
  • Validated lesion creation with histology and electrical measurements.

Conclusions:

  • The developed technique allows precise electrolytic lesions without compromising neuroelectrophysiology.
  • This method enables causal investigations of neural populations and local reorganization.
  • The low-cost, adaptable platform can be integrated into existing electrophysiology setups.