Fig. 9

This figure shows the effect of miraculin on average responses of the combined S, Q and H fibers in the CT and NG nerves. The asterisks show that the only significant difference between the responses before and after miraculin was a larger response in the S fibers to the acids. This increased S fiber response is almost of the same magnitude as the response to sweet stimuli. Neither the Q nor the H fibers responses changed after miraculin. The plot shows an increased S fiber response that adds after miraculin, and effect on the H fiber activity, confirming the effect of miraculin is exclusively on the S fibers. This data clearly supports the labelled-line hypothesis [60]