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J Neurophysiol 70: 2192-2196, 1993;
0022-3077/93 $5.00
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Journal of Neurophysiology, Vol 70, Issue 5 2192-2196, Copyright © 1993 by APS

ARTICLES

Possible network interactions indicated by bilaterally coherent fast rhythms in expiratory recurrent laryngeal nerve discharges

W. X. Huang, C. N. Christakos, M. I. Cohen and Q. He
Department of Physiology and Biophysics, Albert Einstein College of Medicine, Bronx, New York 10461.

1. In a search for correlated fast rhythms in recurrent laryngeal (RL) expiratory (E) activities, we performed spectral and coherence analysis on bilateral RL nerve discharges in 54 midcollicular decerebrate, paralyzed cats. 2. Inspiratory (I) RL activities showed in almost all cases high-frequency oscillations (HFO, range 50-100 Hz) that were bilaterally coherent and also coherent to HFOs in phrenic (PHR) activities. In contrast, bilaterally coherent rhythms (range 24-54 Hz) in RLE discharges were found in only a fraction of the cats (6/54); in the other cats (48/54) such coherences were absent even though the auto-spectra showed the presence of similar fast rhythms on the two sides. The bilateral RLE coherences were associated with increased amplitude and prolonged duration of RLE activity, such as occurred following removal of phasic pulmonary stretch receptor inputs by vagotomy or by no-inflation. 3. Thus, although coherent fast rhythms are uncommon in RLE discharges, their occurrence under some conditions indicates the presence of short-time-scale interactions between neurons involved in this activity. This suggests that such rhythms are a general feature of neural networks.


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W.-X. Huang and M. I. Cohen
Population and Unit Synchrony of Fast Rhythms in Expiratory Recurrent Laryngeal Discharges
J Neurophysiol, August 1, 2000; 84(2): 1098 - 1102.
[Abstract] [Full Text] [PDF]

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K. Nakazawa, A. R. Granata, and M. I. Cohen
Synchronized Fast Rhythms in Inspiratory and Expiratory Nerve Discharges During Fictive Vocalization
J Neurophysiol, March 1, 2000; 83(3): 1415 - 1425.
[Abstract] [Full Text] [PDF]


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