[Receptor responses to amino acids recorded from the surface of the olfactory bulb].

Spontaneous activity and evoked responses were studied in different parts of the carp olfactory bulb. Application of 10(-3) GABA to the bulb surface elicited some or no changes in the patterns of activity, according to the site of application. This finding suggests the receptor's axons to be the source of activity recorded on the surface of rostral or middle bulb portions. During stimulation with 10(-2)--10(-9) M amino acids, a rapid increase in the spike activity occurred. The concentration-response relations were revealed for a number of amino acids. Some groups of receptor axons possessed a selective sensitivity to histamine and to water from aquarium with fishes.