Fig. 10: Summary of shifting processes in the amygdala and hippocampus.
From: Reward recalibrates rule representations in human amygdala and hippocampus intracranial recordings
A Our results suggest HFG win-stay-lose-shift signals occur at transitions between bouts of shifting and staying trials and are controlled by attention. This may have the advantage of being more economical than responding on every trial thereby conserving cognitive and neural resources as the rule needs to be updated less often. Additionally, within bouts of stay trials, delta-theta oscillations in the amygdala and hippocampus are involved in maintaining a signal that the current rule is rewarded and can be used to guide decisions and hippocampus HFG is inhibited to prevent interference in rule representation. B Participants are proposed to adopt two different strategies and attentional sets at different phases of the task as shown by patterns of HFG activity. In the search phase of the task, the amygdala is tuned to attend more to reward feedback (red), at least relative to the staying phase of the task. If reward feedback is received, the correct rule is updated in the hippocampus and patients move to the second strategy of choosing the same stimulus while the amygdala attends more to punishment (blue) relative to reward. Once punishment is received patients change back to the first strategy. Rew Reward, Pun Punishment, WS Win-Stay, LS Lose-Shift.
