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By combining contextual fear conditioning with lesions of the dorsal hippocampus in rats, we discovered that while animals can form long-term contextual fear memories in the absence of the hippocampus, these memories decay with time, lacking the permanence that is a hallmark characteristic of normal fear memories. These findings indicate that while it is initially possible to acquire explicit memories when the hippocampus is compromised, these memories cannot transfer from a recent to remote state. This suggests that memories formed outside the hippocampus may nevertheless require the hippocampus to undergo systems consolidation, which has important clinical implications for the treatment of memory disorders.<\/jats:p>","DOI":"10.1523\/jneurosci.4339-11.2012","type":"journal-article","created":{"date-parts":[[2012,3,7]],"date-time":"2012-03-07T17:33:39Z","timestamp":1331141619000},"page":"3393-3397","source":"Crossref","is-referenced-by-count":70,"title":["Contextual Fear Memories Formed in the Absence of the Dorsal Hippocampus Decay Across Time"],"prefix":"10.1523","volume":"32","author":[{"given":"Moriel","family":"Zelikowsky","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Stephanie","family":"Bissiere","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Michael 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