PMID: 14417719Mar 1, 1960Paper

Electrical impedance changes of the cat's foot pad in relation to sweat secretion and reabsorption

The Journal of General Physiology
D P Lloyd

Abstract

Impedance across the cat's foot pad, the glands being at rest, has a high quite constant value in a given preparation. Stimulation of the sudomotor nerves causes a decrease to a low constant value. After cessation of stimulation impedance returns slowly over a course that is linear with respect to the logarithm of time. The resistive and capacitative components vary with each other. Sweat reabsorption during recovery progresses linearly with respect to time. Hence impedance varies as the logarithm of reabsorption, and therefore as the mean level of sweat columns in the ducts. This relation can be accommodated by supposing that the sweat duct epithelium resembles a core conductor. An electrical model constructed on this principle is shown to behave as does the foot pad. During stimulation at a fixed frequency impedance change varies as the logarithm of duration showing that the amount of sweat produced per impulse at a given frequency is a constant. With frequency of a fixed number of stimuli varied the impedance change varies with it in a manner consistent with the view that the amount of sweat produced per impulse is a constant regardless of frequency.

References

Mar 1, 1959·Proceedings of the National Academy of Sciences of the United States of America·D P Lloyd

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Citations

Jan 1, 1983·European Journal of Applied Physiology and Occupational Physiology·R Grucza
Jul 21, 2012·Medical & Biological Engineering & Computing·Ki Hwan HongKwang Suk Park
Feb 1, 1986·Biological Psychology·S Ba-M'hamedA H Sequeira-Martinho
Mar 15, 1961·Proceedings of the National Academy of Sciences of the United States of America·D P LLOYD
Mar 15, 1961·Proceedings of the National Academy of Sciences of the United States of America·D P LLOYD
Mar 1, 1961·Proceedings of the National Academy of Sciences of the United States of America·G Backus, F Gilbert
Apr 1, 1963·Proceedings of the National Academy of Sciences of the United States of America·D P LLOYD
Aug 1, 1970·Proceedings of the National Academy of Sciences of the United States of America·D P Lloyd

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