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. Author manuscript; available in PMC: 2015 Sep 1.
Published in final edited form as: Neurobiol Learn Mem. 2013 Dec 11;113:149–156. doi: 10.1016/j.nlm.2013.12.003

Figure 1.

Figure 1

Experimental paradigm A. Sequence of events during a single trial of the stressor task. Each trial began with an anticipatory period (yellow frame), followed by an avoidance period (magenta frame) during which subjects received shocks every 2s until the ball was moved to the edge of the grid opposite its starting position (cyan frame). Each trial was followed by an intertrial interval. B. Phases of the two-day fear conditioning paradigm that occurred one week following the stressor task.