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J Neurophysiol 84: 1098-1102, 2000;
0022-3077/00 $5.00
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The Journal of Neurophysiology Vol. 84 No. 2 August 2000, pp. 1098-1102
Copyright ©2000 by the American Physiological Society

RAPID COMMUNICATION

Population and Unit Synchrony of Fast Rhythms in Expiratory Recurrent Laryngeal Discharges

Wu-Xin Huang and Morton I. Cohen

Department of Physiology and Biophysics, Albert Einstein College of Medicine, Bronx, New York 10461

Huang, Wu-Xin and Morton I. Cohen. Population and Unit Synchrony of Fast Rhythms in Expiratory Recurrent Laryngeal Discharges. J. Neurophysiol. 84: 1098-1102, 2000. In a decerebrate, vagotomized, gallamine-paralyzed cat that had a prominent bilaterally coherent fast rhythm (50 Hz) in expiratory (E) recurrent laryngeal (RL) nerve discharges, recordings were taken of the firing of nine RL E fibers. This rhythm (called E high-frequency oscillation or EHFO) was seen as a sharp peak in all unit autospectra, all unit-nerve coherence spectra (value range 0.39-0.91), and all unit-unit coherence spectra (value range 0.27-0.85). In addition, 8/9 units had a sharp autospectral peak in a lower frequency range (19-35 Hz) called E medium-frequency oscillation (EMFO), but there was no coherence at this frequency between signal pairs (unit-unit, unit-nerve, nerve-nerve). The MFOs are specific for each unit and are considered to arise from asynchronous inputs and membrane properties. The HFOs are considered to arise from widespread network interactions that produce a common (correlated) rhythm in virtually all neurons of the RL E network. These phenomena suggest the use of the RL E network as a model system for analyzing rhythmic neural interactions.






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