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Am J Physiol Regul Integr Comp Physiol 265: R1404-R1409, 1993;
0363-6119/93 $5.00
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AJP - Regulatory, Integrative and Comparative Physiology, Vol 265, Issue 6 1404-R1409, Copyright © 1993 by American Physiological Society

ARTICLES

Role of olfaction in starch and oil preference

I. Ramirez
Monell Chemical Senses Center, Philadelphia, Pennsylvania 19104-3308.

Two different techniques were used to assess the role of olfaction in the preference rats show for dilute nutrient suspensions and solutions. Removal of the olfactory bulbs reduced but did not abolish preference for 1% starch and oil emulsions. Removal of the olfactory bulbs also reduced preference for sucrose, Polycose, and saccharin. In another experiment, rats were rendered anosmic with intranasal zinc sulfate. The degree of anosmia was evaluated by measuring preference for an aqueous solution of citral and vanillin. Rats whose avoidance of citral plus vanillin had been abolished by zinc sulfate continued to prefer a 1% starch suspension over vehicle, although starch preference was significantly reduced. It is concluded that starch and oil preference is mediated by both olfactory and nonolfactory cues.


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