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Figure 6


Fig. 6. Once the negative image is fully developed, it can be long lasting. (A) The negative image appears after five 30 s coupling tests, and then another five 30 s couplings are given to reinforce the negative image. The negative image is still apparent after a 2 h rest period without parallel fiber or electrosensory stimulation, but then fades over 20 min after parallel fiber stimulus trains alone are resumed. (B) Histograms as in previous figures.