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Although the retrosplenial cortex (RSC) is critically involved in spatial learning and memory, it appears to have more selective contributions to learning and memory for discrete cues. For example, damage to the RSC does not impair Pavlovian delay fear conditioning to a discrete auditory cue (e.g., tone), when RSC manipulation occurs just prior to, or shortly after, conditioning. In contrast, when lesions of the RSC occur following a substantial retention interval (e.g., 28 days), the RSC is necessary for retrieval of fear to the tone. Thus, the RSC makes time-dependent contributions to memory retrieval for discrete auditory cues. The purpose of the current experiment was to assess if the time-dependent involvement of the RSC in cue-specific fear memory extended to cues of other sensory modalities. Rats firsts underwent fear conditioning to a visual stimulus, and lesions of the RSC subsequently occurred 1 or 28 days later. Lesions of the RSC impaired fear expression when made 28 days after conditioning, but not when made 1 day following conditioning. Coupled with previous findings, the current results suggest the RSC is necessary for retrieval of remotely acquired cued fear memories across multiple modalities. (PsycINFO Database Record (c) 2018 APA, all rights reserved)





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