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Fig. 3. The responsiveness of the fast electrosensory pathway decreases with the
intensity of the conditioning stimuli. To assess the effect of activation of
the fast electrosensory pathway on its responsiveness, the amplitude of the
response of the magnocellularis nucleus to an artificial test stimulus of
intensity 2x the threshold was studied as a function of the amplitude of
an artificial conditioning stimulus, and the delay between conditioning and
test stimuli, in a curarized fish. The amplitude of the test response (as a
percentage of its maximal response) is plotted as a function of the delay
between conditioning and test stimuli for eight conditioning stimulus
intensities (0–10x threshold).
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