Journal
BEHAVIORAL NEUROSCIENCE
Volume 121, Issue 1, Pages 218-223Publisher
AMER PSYCHOLOGICAL ASSOC
DOI: 10.1037/0735-7044.121.1.218
Keywords
episodic; recognition; objects; hippocampus; memory
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Funding
- Medical Research Council [G9724886] Funding Source: researchfish
- MRC [G9724886] Funding Source: UKRI
- Medical Research Council [G9724886] Funding Source: Medline
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Dual-process models of recognition memory in animals propose that recognition memory is supported by two independent processes that reflect the operation of distinct brain structures: a familiarity process that operates independently of the hippocampus and a context-dependent (episodic) memory process that is dependent on the hippocampus. A novel variant of an object recognition procedure was used to examine this proposal. Healthy rats showed a preference for exploring a novel object rather than a familiar object: a familiarity-dependent recognition effect. They also showed a preference for exploring a familiar object that was presented in a different spatiotemporal context rather than a familiar object that was presented either in a different spatial or temporal context: a context-dependent form of recognition that is sensitive to what object has been presented where and when. Rats with excitotoxic hippocampal lesions showed the familiarity-dependent but not the context-dependent form of recognition. The results provide support for dual-process theories of recognition memory.
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