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Related Experiment Videos

Cable analysis with the whole-cell patch clamp. Theory and experiment.

M B Jackson1

  • 1Department of Physiology, University of Wisconsin Medical School, Madison 53706.

Biophysical Journal
|March 1, 1992
PubMed
Summary
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This study introduces a new cable analysis method for whole-cell patch clamp recordings. The method accurately estimates neuronal electrical parameters, aiding neurophysiologists in studying neuronal cable properties.

Area of Science:

  • Neuroscience
  • Computational Neuroscience
  • Biophysics

Background:

  • Whole-cell patch clamp technique is crucial for neuronal electrophysiology.
  • Cable analysis is essential for understanding neuronal electrical properties.
  • Previous cable analysis methods had limitations with whole-cell patch clamp data.

Purpose of the Study:

  • To develop and validate a theoretical model for cable analysis under voltage clamp conditions with finite access resistance.
  • To derive simple formulas for estimating key electrophysiological parameters of neurons.
  • To assess the applicability of the Rall model to experimental data from different neuronal types.

Main Methods:

  • Theoretical analysis of a Rall motoneuron model under voltage clamp.

Related Experiment Videos

  • Derivation of formulas for electrotonic length, membrane time constant, and soma-dendrite resistance ratio.
  • Application of the derived methods to simulated and experimental transient currents.

    • Main Results:

    • Soma and cable charging currents can be distinguished, with soma charging time dependent on access resistance and somatic capacitance.
    • Simple formulas accurately estimate neuronal electrical parameters from simulated data.
    • The Rall model effectively described hippocampal pyramidal cell transients but not neurohypophysial nerve ending transients.

    Conclusions:

    • The developed cable analysis methods are suitable for whole-cell patch clamp data.
    • These methods provide reliable estimates of neuronal electrical parameters, even with variations in soma and dendrite membrane properties.
    • The approach facilitates the investigation of cable properties in diverse neuronal systems using modern electrophysiological techniques.