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Voltage-clamp studies were carried out on single rabbit myelinated nerve fibres at 14 degrees C with the method of Dodge (b) the P(Na) (E) curve for mammal is shifted 10-15 mV in the hyperpolarizing direction. 5. From the kinetics of sodium current, the non-propagating rabbit action potential was reconstructed at 14 degrees C. The transient inward sodium current is responsible for the fast initial depolarization phase of the action potential, while the repolarizing phase is accounted for by leak alone. The computed shape of the action potential was in good agreement with the experimentally obtained action potential. 6. At 14 degrees C, frog and rabbit nodes with similar diameters have similar measured gNa values.
Chiu et al. (Sun,) studied this question.