Document Detail

Reinstatement in honeybees is context-dependent.
MedLine Citation:
PMID:  23077335     Owner:  NLM     Status:  In-Data-Review    
During extinction animals experience that the previously learned association between a conditioned stimulus (CS) and an unconditioned stimulus (US) no longer holds true. Accordingly, the conditioned response (CR) to the CS decreases. This decrease of the CR can be reversed by presentation of the US alone following extinction, a phenomenon termed reinstatement. Reinstatement and two additional phenomena, spontaneous recovery and renewal, indicate that the original CS-US association is not lost through extinction but can be reactivated through different processes. In honeybees (Apis mellifera), spontaneous recovery, i.e., the time-dependent return of the CR, has been demonstrated, suggesting that also in these insects the original CS-US association is not lost during extinction. To support this notion, we ask whether honeybees show reinstatement after extinction. In vertebrates reinstatement is context-dependent, so we examined whether the same holds true for honeybees. We demonstrate reinstatement in restrained honeybees and show that reinstatement is context-dependent. Furthermore, we show that an alteration of the color of light illuminating the experimental setup suffices to indicate a contextual change. We conclude that in honeybees the initially formed CS-US memory is not lost after extinction. Rather, honeybees might learn about the context during extinction. This enables them to adequately retrieve one of the two opposing memories about the CS that have been formed after extinction.
Jenny Aino Plath; Johannes Felsenberg; Dorothea Eisenhardt
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Publication Detail:
Type:  Journal Article     Date:  2012-10-17
Journal Detail:
Title:  Learning & memory (Cold Spring Harbor, N.Y.)     Volume:  19     ISSN:  1549-5485     ISO Abbreviation:  Learn. Mem.     Publication Date:  2012  
Date Detail:
Created Date:  2012-10-18     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9435678     Medline TA:  Learn Mem     Country:  United States    
Other Details:
Languages:  eng     Pagination:  543-9     Citation Subset:  IM    
Freie Universität Berlin, FB Biologie, Pharmazie, Chemie, Institut für Biologie, Neurobiologie, Königin-Luise-Strasse 28/30, 14195 Berlin, Germany.
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