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Distinct mechanisms underlie electrical coupling resonance and its interaction with membrane potential resonance
Xinping Li1, Omar Itani1, Dirk M Bucher1
1Department of Biological Sciences, New Jersey Institute of Technology, Newark, NJ, United States.
Frontiers in Systems Biology
|August 14, 2025
Summary
Electrical coupling resonance in neuronal networks shows frequency selectivity. Membrane potential resonance explains coupling coefficient resonance, but not coupling conductance resonance, which arises from other factors.
Area of Science:
- Neuroscience
- Computational Neuroscience
- Systems Neuroscience
Background:
- Neurons in oscillatory networks display membrane potential resonance, peaking at specific input frequencies.
- Electrically coupled networks can exhibit coupling resonance, where the coupling coefficient shows frequency selectivity.
Purpose of the Study:
- To investigate the relationship between neuronal resonance and coupling resonance in electrically coupled networks.
- To determine if electrical coupling conductance exhibits frequency dependence.
- To explore the functional role of coupling conductance resonance in synchronizing neuronal activity.
Main Methods:
- Dual current- and voltage-clamp recordings from electrically coupled pyloric neurons in Cancer borealis.
- Quantification of neuronal frequency preference, coupling coefficient, electrical conductance, and postjunctional response.
- Mathematical and computational modeling to analyze resonance properties.
Main Results:
- All measured components, including neuronal response, coupling coefficient, and electrical conductance, exhibited frequency selectivity with distinct preferred frequencies.
- Membrane potential resonance of the postjunctional neuron sufficiently explained the resonance of the coupling coefficient.
- Resonance in coupling conductance was not explained by postjunctional neuronal resonance, suggesting contributions from other circuit elements or gap junction gating properties.
Conclusions:
- Electrical coupling resonance is a complex phenomenon influenced by multiple factors.
- Membrane potential resonance is a key determinant of coupling coefficient resonance.
- Coupling conductance resonance arises independently, potentially from gap junction dynamics or network interactions, and plays a role in synchronizing neuronal activity.
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