The temporal specificity of the switch from NMDAr-dependent extinction to NMDAr-independent re-extinction.
Recent findings show that the switch from NMDAr-dependent extinction to NMDAr-independent re-extinction is both context and stimulus specific. In this study we examined whether this switch was temporally specific as well. Re-extinction was found to be NMDAr-independent when it occurred 2 days after initial extinction but NMDAr-dependent when it occurred 21 days following initial extinction, thereby illustrating the importance of time as a type of context that modulates the mechanisms involved in extinction.
Langton
Julia M
JM
School of Psychology, University of New South Wales, Sydney, NSW, Australia. jlangton@psy.unsw.edu.au
Richardson
Rick
R
D000704:Analysis of Variance; D000818:Animals; D001522:Behavior, Animal / Q000187:drug effects; D003214:Conditioning, Classical / Q000187:drug effects / Q000502:physiology*; D016291:Dizocilpine Maleate / Q000494:pharmacology; D018691:Excitatory Amino Acid Antagonists / Q000494:pharmacology; D005108:Extinction, Psychological / Q000187:drug effects / Q000502:physiology*; D008297:Male; D051381:Rats; D017207:Rats, Sprague-Dawley; D016194:Receptors, N-Methyl-D-Aspartate / Q000502:physiology*; D013997:Time Factors
D018691:Excitatory Amino Acid Antagonists; D016194:Receptors, N-Methyl-D-Aspartate; D016291:Dizocilpine Maleate