Contextual Fear Extinction and Re-Extinction in Carioca High- and Low-Conditioned Freezing Rats

Autor:	Laura A. León, Vitor de Castro Gomes, Daniel C. Mograbi, Fernando P. Cardenas, Jesus Landeira-Fernandez
Rok vydání:	2014
Předmět:	Genetic selection social sciences Extinction (psychology) Contextual fear Conditioned freezing Selective breeding Psychology Neuroscience humanities Developmental psychology
Zdroj:	World Journal of Neuroscience. :247-252
ISSN:	2162-2019 2162-2000
DOI:	10.4236/wjns.2014.43028
Popis:	We recently reported two novel breeding lines of rats known as Carioca High- and Low-conditioned Freezing (CHF and CLF), based on defensive freezing responses to contextual cues previously associated with electric footshock. The present study used animals of the 8th generation of our selective breeding program to investigate both contextual fear extinction and re-extinction. The results consistently showed that CHF animals froze more than CLF animals. Long extinction training was able to extinguish phenotypic differences between lines, but the divergence was restored after just one fear reacquisition training session. These differences disappeared again during re-extinction training. The possible neural mechanisms involved in these two types of learning are discussed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::f49fe3223a204a88e286523dad461bcb https://doi.org/10.4236/wjns.2014.43028 Zobrazit plný text záznamu