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Am J Physiol Cell Physiol 249: C160-C165, 1985;
0363-6143/85 $5.00
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AJP - Cell Physiology, Vol 249, Issue 1 160-C165, Copyright © 1985 by American Physiological Society

ARTICLES

Spectral characterization of ciliary beating: variations of frequency with time

D. Eshel, Y. Grossman and Z. Priel

Ciliary beating frequency in tissue culture from frog palate and isolated lung was optically examined using instrumentation that was adjusted to measure a fraction of the surface area of a single ciliary cell. Consecutive 1-s segments of the analogue signal were fast Fourier transformed (FFT) to obtain a power spectrum. At room temperature, these power spectra changed over time from 1 s to the next. Each spectrum contained several dominant frequencies of similar intensities. Cooling the preparation resulted in a single-peak spectrum that was constant over time. A mathematical model is proposed to simulate these findings. The results and the mathematical model support the hypothesis that ciliary beating frequency fluctuates over short periods of time.


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