Species Differences in Taste Responses

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Abstract
Electrical responses recorded from the chorda tympani nerve as different chemical stimuli were applied to the tongue were quantitatively compared in rats, hamsters, guinea pigs, racoons, cats and dogs. The hamster and guinea pig responded well to 0.5 [image] sucrose; the cat only slightly. The greatest response in rabbits was elicited by 20 mM quinine-HCl; 0.01 [image] HCL elicited a large response in hamsters; whereas, the dog gave a low response in both of these qualities. The rodents responded well to NaCl compared to KC1 at all concn.; however, the reverse was true in carnivores. A large response was initiated in both orders by NH4Cl. The spontaneous activity observed during a water rinse was abundant in the rabbit, moderate in the cat, and only slight in the guinea pig, hamster, and dog. This activity was suppressed in the rabbit with low concentration of NaCl.
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