Abstract
The olfactory bulbar responses induced by chemical stimulation of the nares of rainbow trout were computer analyzed into frequency components. The spontaneous activity of the bulb was predominated by low-frequency components (2-6 Hz). Upon stimulation this immediately shifted to high-frequency components (7-11 Hz). The peak frequency pattern was characteristic of each single chemical tested regardless of the stimulus intensity. Multi-peak spectra were obtained on stimulation with compound stimuli such as food extract. The frequency component coding mechanism for olfactory receptive discriminatory function in the olfactory bulb is discussed.
