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. Author manuscript; available in PMC: 2011 Sep 1.
Published in final edited form as: Neuroimage. 2010 Jan 25;52(3):833–847. doi: 10.1016/j.neuroimage.2010.01.047

Figure 2.

Figure 2

Simulated activity of the AN during two trials of the trace conditioning task of Paton et al. (2006). During the first trial CS A is presented, followed by a reward. The AN network is initially in the neutral state ‘0’ in which all populations are inactive (the activity is color coded: blue means inactive, red means active). The presentation of CS A initiates a competition between the positive coding AN population ‘+’ and the negative coding population ‘−’ which, in this simulation, ends with the activation of population ‘+’. The delivery of reward resets the AN to the ‘0’ state. In the second trial CS B activates population ‘−’ and punishment resets it.