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The theoretical small signal impedance of the frog node, Rana pipiens.

Authors
Type
Published Article
Journal
Pflügers Archiv : European journal of physiology
Publication Date
Volume
366
Issue
2-3
Pages
273–276
Identifiers
PMID: 1087004
Source
Medline
License
Unknown

Abstract

The small signal impedance of the frog node is calculated for frequencies from 1 Hz to 10,000 Hz and transmembrane potentials from -80 mV to -30 mV, by linearizing the voltage clamp equations of Dodge [7] and Hille [8]. The modulus of the impedance is presented for the total system, and separately for the potassium and sodium systems as a function of frequency and voltage. There is a broad resonance in the total impedance with a voltage-dependent peak frequency. At 22 degrees C, in the range -75 mV to -45 mV, the peak frequencies occur between 50 and 500 Hz. Removing the potassium system leaves a relatively sharp resonance centered around 200 Hz at -45 mV.

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