Figure 3.

The ability of subjects to learn trace conditioning with a mossy fiber stimulation CS decreases as the trace interval increases. (A) Average response rates, normalized to delay conditioning trials, from the session after criterion was reached (n = 6). (B) Coronal section through the cerebellum shows a representative stimulation site in the middle cerebellar peduncle for the studies in this figure and in Figure 2. All stimulation sites were in the middle cerebellar peduncle. (C) Representative traces from the session after criterion was reached for trace intervals of 200, 300, and 400 msec.