Extending possible applications of an episodic-like memory task in rats.
Recently, an object recognition episodic-like memory task was proposed in rodents. However, the short retention delay of the task narrows its applications. This study verifies whether this task can be evoked after 24h. Additionally, the effect of a classical amnestic agent (scopolamine) on episodic-like memory consolidation was investigated. Rats showed increased exploration of old over recent objects and spent more time exploring displaced over stationary object. Both old over recent and displaced over stationary objects preferences were abolished by pos-training scopolamine administration (1mg/kg i.p.), indicating impaired spatiotemporal retrieval. In conclusion, the object recognition task that accomplishes the what, where and when components of episodic-like memory in rats can persist for 24h.
Barbosa
Flávio Freitas
FF
Memory Studies Laboratory, Physiology Department, Federal University of Rio Grande do Norte, Natal, Brazil.
Pontes
Isabella Maria de Oliveira
IM
Ribeiro
Alessandra Mussi
AM
Silva
Regina Helena
RH
D000818:Animals; D005106:Exploratory Behavior / Q000187:drug effects; D008297:Male; D011939:Mental Recall / Q000187:drug effects*; D051381:Rats; D017208:Rats, Wistar; D012601:Scopolamine / Q000494:pharmacology*; D013997:Time Factors
D012601:Scopolamine