Zelikowsky 2014~~~~~~

Question 1

Describe the design, DV, and population of Zelikowsky et al 2014, Neuronal ensembles in amygdala, hippocampus, and prefrontal cortex track differential components of contextual fear.

Answer 1

Used catfish to quantify time course of neural activation in rats that were either delay fear-conditioned (contextual) or shocked immediately (no contextual conditioning control group)
DV: freezing upon re-exposure to context
Population: Long-Evans Rats

Question 2

Zelikowsky 2014; Dorsal Hippocampus findings

Answer 2

Dorsal Hippocampus: activated upon re-exposure to context for both groups

Question 3

Zelikowsky 2014;Basolateral amygdala findings

Answer 3

Bla: activated for delay-fear conditioned group, same neurons involved in encoding initial contextual fear memory were also involved in later expression of that fear memory.

Question 4

Zelikowsky 2014; mPFC findings for Perilimbic and Infralimbic regions:

Answer 4

PL mPFC: some context representing neurons, another population encoding shock-ccontext association; combine info from amygdala and hippocampus to guide behavior.

IL mPFC: small population of neurons activated after delay/immediate shock, consistent with idea that IL region responds to changing contingencies (e.g. Extinction).