Figure 4.

Effects of interhemispheric lesions on the ability to discriminate between falling and rising continuous FM tones (CS+: 1–2 kHz, CS–: 2–1 kHz), when the lesion was induced after training (retrieval paradigm, experiment 2). A, top, Learning curves show the mean (±1 SEM) of behavioral performance (CR rate difference) of lesioned and control animals in daily sessions. Middle, Mean ± 1 SEM values of the parametric detectability index d-prime. Bottom, Mean ± 1 SEM H (solid lines) and FA (dashed lines) rates. There are no significant differences between experimental groups; thus, lesioning interhemispheric connections after successful acquisition did not change task performance. N_sham = 5; N_{Les R->L} = 5; N_{Les L->R} = 6. For other conventions see Figure 3A. B, Scatter plot of retrieval discrimination performance (median of the 5 test sessions) versus discrimination performance during the last four training days before laser illumination (final DP; see Fig. 3C). Given are median values and quartiles. Mann–Whitney U statistics did not reveal any significant between-group differences.