Amygdala regulates risk of predation in rats foraging in a dynamic fear environment.

ABSTRACT: In a natural environment, foragers constantly face the risk of encountering predators. Fear is a defensive mechanism evolved to protect animals from danger by balancing the animals' needs for primary resources with the risk of predation, and the amygdala is implicated in mediating fear responses. However, the functions of fear and amygdala in foraging behavior are not well characterized because of the technical difficulty in quantifying prey-predator interaction with real (unpredictable) predators. Thus, the present study investigated the rat's foraging behavior in a seminaturalistic environment when confronted with a predator-like robot programmed to surge toward the animal seeking food. Rats initially fled into the nest and froze (demonstrating fear) and then cautiously approached and se

SUBMITTER: Choi JS 

PROVIDER: S-EPMC3003044 | biostudies-literature | 2010 Dec

REPOSITORIES: biostudies-literature