[Facilitation phenomenon in the accessory and main olfactory bulbs of the frog Rana temporaria]. / Iavlenie oblegcheniiia v dopolnitel'noi i osnovnoi oboniatel'nykh lukovitsakh liagushki Rana temporaria.

It has been demonstrated that facilitation of orthodromic EP by paired electrical stimuli (which was observed earlier in the accessory olfactory bulb of the frog) is also realized in the main olfactory bulb. Facilitation phenomenon in both bulbs is revealed provided the conditioned EP is present before paired stimulation. The accessory olfactory bulb differs from the main one by a longer duration of facilitation. Possible nature of facilitation phenomenon is discussed. It is suggested that differentiation of the olfactory system into the main and accessory ones may be based on differences in the velocity of their activity.

[Measurement of the propagation rate of the summation action potential in the vomeronasal and olfactory nerves of Rana temporaria frogs]. / Dannye izmerenii skorosti rasprostraneniia summarnogo potentisiala deístviia po vomeronazal'nomu i oboniatel'nomu nervam liagushki Rana temporaria.

It was shown that summation action potential (AP) in various points of the nerve result from summation AP in various bundles of fibres. The rate of propagation of AP in various bundles may differ rather significantly. Propagation of AP from the site of stimulation takes place with acceleration, which is presumably due to the inhibitory effect of the stimulus at the site of its application (together with the excitatory effect as well). Both nerves exhibit also supernormal phenomenon which reveals itself in the increase of the propagation rate of the second AP during stimulation by paired stimuli.