OSCILLATION POTENTIAL IN STRYCHNINIZED OLFACTORY BULB

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Abstract
In the strychninized olfactory bulb of curarized rabbits, single shock stimulation of the olfactory epithelium was found to bring about a monophasic negative wave of 20-40 msec. duration (N-potential) followed by a train of 30-50 cps oscillatory wave lasting 200-400 msec. (R-wave). The R-wave and the induced wave readily disappeared after intravenous injection of pentobarbital sodium while the N-potential was more resistant. The R-wave disappeared during anterior commissure stimulation and augmented in the post-stimulation period. By highly frequent stimulation in the mesencephalic reticular formation, the R-wave was markedly suppressed and during asphyxia, it was lost simultaneously with the induced wave. A number of units in the olfactory bulb discharged rhythmically bearing a clear phase relationship with the R-wave, while in some units, suppression of the spontaneous discharge was observed during the excursion of the R-wave.

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