RECEPTIVE FIELDS OF CAT TASTE FIBERS

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Abstract
The receptive fields of 25 cat chorda tympani taste fibers were mapped by the application of taste solutions to individual fungiform papillae on the tongue. Chemical stimulation of other sites on the tongue was ineffective. The receptive fields were in general small and discrete, but could extend for distances of more than 5 mm with one or more unresponsive papillae interposed between responsive papillae. Since most fibers branched and innervated at least 2 fungiform papillae (mean 2.7), it was possible to stimulate 2 papillae within a fiber's receptive field independently. The two sets of taste receptors innervated by a given fiber had similar relative chemical sensitivity. Therefore, branches of a taste fiber are not connected at random to the various kinds of taste receptor cells.

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