Document Detail

Rats use hippocampus to recognize positions of objects located in an inaccessible space.
MedLine Citation:
PMID:  23034727     Owner:  NLM     Status:  Publisher    
Rat hippocampus plays a crucial role in many spatial tasks, including recognition of position of objects, which can be approached and explored. Whether hippocampus is also necessary for recognizing positions of objects located in an inaccessible part of the environment remains unclear. To address this question, we conditioned rats to press a lever when an object displayed on a distant computer screen was in a particular position ("reward position") and not to press the lever when the object was in other positions ("nonreward positions"). After the rats had reached an asymptotic performance, the role of the dorsal hippocampus was assessed by blocking its activity with muscimol. The rats without functional dorsal hippocampus did not discriminate the reward position from the nonreward positions. Then the same rats were trained to discriminate light and dark conditions. The hippocampal inactivation did not disrupt the ability to discriminate these two conditions. It indicated that the inactivation itself had no major effect on the operant behavior and its control by visual stimuli. We conclude that rats use dorsal hippocampus for recognizing positions of objects located in an inaccessible part of the environment. © 2012 Wiley Periodicals, Inc.
D Levcik; T Nekovarova; A Stuchlik; D Klement
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-10-4
Journal Detail:
Title:  Hippocampus     Volume:  -     ISSN:  1098-1063     ISO Abbreviation:  Hippocampus     Publication Date:  2012 Oct 
Date Detail:
Created Date:  2012-10-4     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9108167     Medline TA:  Hippocampus     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2012 Wiley Periodicals, Inc.
Department of Neurophysiology of Memory, Institute of Physiology Academy of Sciences of the Czech Republic v.v.i., Prague, Czech Republic.
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