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Sensory nerve responses to lip stimulation with AA are not significantly different in preparations from control and conditioned snails. (A,B,C) Average change in nerve activity in response to AA (0.54 mM, 30 sec) applied to the lips recorded in the median lip nerve (A), superior lip nerve (B), and tentacle nerve (C) of control and conditioned snails (n = 7 for each nerve; error bars not shown for clarity).
