4.4 Article

Protonic conductor: better understanding neural resting and action potential

期刊

JOURNAL OF NEUROPHYSIOLOGY
卷 124, 期 4, 页码 1029-1044

出版社

AMER PHYSIOLOGICAL SOC
DOI: 10.1152/jn.00281.2020

关键词

action potential; axon myelination; electrophysiology; liquid-membrane interface; localized surface charge density; protonic capacitor; transmembrane electrostatically localized protons

资金

  1. Department of Chemistry & Biochemistry at Old Dominion University
  2. College of Sciences at Old Dominion University
  3. Office of Research at Old Dominion University
  4. Old Dominion University Research Foundation

向作者/读者索取更多资源

With the employment of the transmembrane electrostatic proton localization theory with a new membrane potential equation. neural resting and action potential is now much better understood as the voltage contributed by the localized protons/cations at a neural liquid- membrane interface. Accordingly. the neural resting/action potential is essentially a protonic/cationic membrane capacitor behavior. It is now understood with a newly formulated action potential equation: when action potential is <0 (negative number), the localized protons/cations charge density at the liquid-membrane interface along the periplasmic side is >0 (positive number); when the action potential is >0, the concentration of the localized protons and localized nonproton cations is <0. indicating a depolarization state. The nonlinear curve of the localized protons/cations charge density in the real-time domain of an action potential spike appears as an inverse mirror image to the action potential. The newly formulated action potential equation provides biophysical insights for neuron electrophysiology, which may represent a complementary development to the classic Goldman-Hodgkin-Katz equation. With the use of the action potential equation, the biological significance of axon myelination is now also elucidated as to provide protonic insulation and prevent any ions both inside and outside of the neuron from interfering with the action potential signal, so that the action potential can quickly propagate along the axon with minimal (e.g., 40 times less) energy requirement. NEW & NOTEWORTHY The newly formulated action potential equation provides biophysical insights for neuron electrophysiology, which may represent a complementary development to the classic Goldman-Hodgkin-Katz equation. The nonlinear curve of the localized protons/cations charge density in the real-time domain of an action potential spike appears as an inverse mirror image to the action potential. The biological significance of axon myelination is now elucidated as to provide protonic insulation and prevent any ions from interfering with action potential signal.

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