Abstract
1. The actions of various sensory stimulation upon the induced wave of the olfactory bulb of a frog were studied.
2. The induced waves were inhibited by the application of pain and warmth on the skin, light to the eye and sound to the ear. They were also inhibited by the application of sodium chloride, cane sugar, acetic acid and quinine solution onto the tongue.
3. On the contrary, the induced waves were generally augmented by the application of touch and cold on the skin as well as distilled water on the tongue.
4. These findings support the view that there are facilitatory and inhibitory fibers in the centrifugal nervous system from the higher brain centers to the olfactory bulb. The biological functions of these two fiber systems were considered.
