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Related Concept Videos

Resting Potential Decay01:15

Resting Potential Decay

The resting membrane potential of a neuron (-70mV) is sustained due to the selective ion permeability of the membrane. At the resting potential, the membrane is slightly permeable to ions like sodium (Na+) and chloride (Cl−) and highly permeable to potassium ions (K+). Differences in the ions' concentration inside the cell compared to the outside are maintained by membrane transport proteins like channels and pumps.
At rest, the K+ is the main ion that moves across the membrane through...
Resting Potential Decay01:15

Resting Potential Decay

The resting membrane potential of a neuron (-70mV) is sustained due to the selective ion permeability of the membrane. At the resting potential, the membrane is slightly permeable to ions like sodium (Na+) and chloride (Cl−) and highly permeable to potassium ions (K+). Differences in the ions' concentration inside the cell compared to the outside are maintained by membrane transport proteins like channels and pumps.
At rest, the K+ is the main ion that moves across the membrane through...

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Related Experiment Video

Updated: May 10, 2026

Real-time Electrophysiology: Using Closed-loop Protocols to Probe Neuronal Dynamics and Beyond
08:08

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Published on: June 24, 2015

Single neuron dynamics during experimentally induced anoxic depolarization.

Bas-Jan Zandt1, Tyler Stigen, Bennie Ten Haken

  • 1MIRA-Institute for Biomedical Technology and Technical Medicine, University of Twente, Enschede, The Netherlands;

Journal of Neurophysiology
|July 5, 2013
PubMed
Summary
This summary is machine-generated.

Neuronal energy depletion causes anoxic depolarizations, impacting brain conditions like stroke and epilepsy. Our study reveals these varied voltage dynamics stem from ion concentration changes in neurons with healthy ion channels.

Keywords:
anoxiabifurcationdepolarizationdynamicsion concentration

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Area of Science:

  • Neuroscience
  • Computational Neuroscience
  • Cellular Electrophysiology

Background:

  • Anoxic depolarizations occur during neuronal energy depletion, a factor in pathologies like stroke, epilepsy, and migraine.
  • Understanding these depolarizations is crucial for comprehending neuronal dysfunction in various neurological disorders.

Purpose of the Study:

  • To investigate the diverse single neuron dynamics during anoxic depolarizations.
  • To determine if observed voltage dynamics result from intrinsic cellular properties or altered ion concentrations.
  • To link experimental observations to a theoretical model of neuronal behavior.

Main Methods:

  • Experimental simulation of energy depletion in rat cortical slices by inhibiting sodium-potassium pumps with ouabain.
  • Measurement of pyramidal cell membrane voltage during induced depolarizations.
  • Bifurcation analysis of a single-cell model to interpret voltage dynamics.

Main Results:

  • Observed five distinct types of membrane voltage dynamics during anoxic depolarizations.
  • Demonstrated that these varied dynamics arise from the same neuron model.
  • Showed that different ion concentration profiles (intra- and extracellular sodium and potassium) drive the distinct voltage behaviors.

Conclusions:

  • The diverse dynamical behaviors during anoxic depolarization are not due to different cell types or channel malfunctions.
  • These dynamics are predictable responses of a single neuron model to specific changes in sodium and potassium concentrations.
  • Provides a unifying explanation for varied neuronal responses under conditions of energy depletion.