DISTRIBUTION OF CORTICAL POTENTIALS RESULTING FROM INSUFFLATION OF VAPORS INTO THE NOSTRILS AND FROM STIMULATION OF THE OLFACTORY BULBS AND THE PYRIFORM LOBE

Abstract

Action potentials from the pyriform lobe followed single shock stimulation of the olfactory bulbs or insufflations of xylol, cloves, asafetida or laboratory air into the nostrils of dogs in which trigeminal and vagal stimulation had been eliminated. Single shock stimulation of pyriform lobe evoked potentials from the ventro-lateral portion of the prefrontal area and antidromically from the olfactory bulbs, but not from other cortical areas. No spikes were recorded from the prefrontal area following stimulation of the olfactory bulbs or from stimulating the pyriform lobe of one dog after areas 8, 9, and 10 had been under cut from the rear.