Fig. 4.

Behavioral performance session. Given light cues (rectangular), the rats pulled the lever to get stimulation reward (circle). Lever-pulls during the break period (error-pulls, x-mark) increase the duration of the break period, indicating a longer inter-trial interval. All event occurrences and their performance (reward/cue) are depicted for each rat at the top and bottom, respectively. While the rat RS007 and RS008 shows an improvement within the session, the rat RS009 shows no improvement.