Trace fear conditioning: a role for context?
Fear conditioning can be rapidly obtained over long trace intervals, but its specificity with respect to both time and stimulus is uncertain. Long-trace fear conditioning often parallels contextual conditioning, and it is sensitive to hippocampal lesions. These properties of trace conditioning are not directly addressed by timing models and multiple-time-scale models of conditioning. It is proposed that during early stages of conditioning, a joint representation of the context and the stimulus trace may underlie conditioned responses, and that discriminative processes allow the emergence of specific responses in a later stage.
Marchand
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Laboratoire de Neurosciences Cognitives, UMR 5106, CNRS/Université de Bordeaux I, Bat. B2, Avenue des Facultes, F-33405 Talence Cedex, France. a.marchand@lnc.u.Bordeaux 1.fr
Luck
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Di Scala
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D000161:Acoustic Stimulation / Q000592:standards; D000818:Animals; D001362:Avoidance Learning / Q000502:physiology*; D002320:Cardiovascular Physiological Phenomena; D003214:Conditioning, Classical / Q000502:physiology*; D003463:Cues; D005239:Fear / Q000502:physiology*; D023421:Models, Animal; D009483:Neuropsychological Tests / Q000592:standards*; D011930:Reaction Time / Q000502:physiology; D013997:Time Factors