SUPPRESSION OF OTTOSON WAVES IN THE ISOLATED OLFACTORY-BULB DURING SLEEP IN THE PONTINE CAT

IN the chronic pontine cat, in which the olfactory bulbs are isolated from the brain stem, the Ottoson and/or Adrian-induced waves are suppr essed during paradoxical sleep. This phenomenon cannot be explained by a central centrifugal control. The suppression of olfactory electrica l activity was found to correlate with vasodilatation of the nasal muc osa. It is likely, therefore that control of the olfactory bulb activi ty might be mediated through the vasomotor innervation of the nasal mu cosa originating from the medulla.