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. 2014 Aug 8;8:273. doi: 10.3389/fnbeh.2014.00273

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Copyright © 2014 Cominski, Jiao, Catuzzi, Stewart and Pang.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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ITI responding during the first minute of the intertrial interval (ITI). Hippocampal lesion increased ITI responding during the first minute of the ITI during acquisition and extinction (A). Group differences were not present during the second or third minute of the ITI (not shown). WKY rats showed a trend for increased ITI responding during the first minute of the ITI in the avoidance phase, but not extinction (B). Strain differences were not observed during the second or third minute of the ITI (not shown).