[Development of short-term habituation in surviving brain slices].

Effects of repeated stimulation with different frequencies (1, 5, 10, 100/sec) of the lateral olfactory tract on the field potentials (FPs) were investigated in the rat olfactory cortex slices. An increase in the frequency of stimulation produced a decline of the FPs. Spontaneous recovery of the FP amplitudes occurred within 5-10 sec following the termination of the stimulation. Polysynaptic FPs revealed a more obvious habituation than monosynaptic potentials. Depression of the inhibitory processes (the population IPSP) was also rapid and profound. The data obtained suggest the habituation phenomenon and are discussed in terms of learning processes.