Single-trial dynamics of hippocampal spatial representations are modulated by reward value

10.1101/2020.10.21.349043 ◽

2020 ◽

Author(s):

Frédéric Michon ◽

Esther Krul ◽

Jyh-Jang Sun ◽

Fabian Kloosterman

Keyword(s):

Large Reward ◽

Cell Activity ◽

Place Cell ◽

Spatial Representations ◽

Memory Retention ◽

Single Trial ◽

Learning Speed ◽

High Reward ◽

Reward Value ◽

Hippocampal Place Cell

AbstractReward value is known to modulate learning speed in spatial memory tasks, but little is known about its influence on the dynamical changes in hippocampal spatial representations. Here, we monitored the trial-to-trial changes in hippocampal place cell activity during the acquisition of place-reward associations with varying reward size. We show a faster reorganization and stabilization of the hippocampal place map when a goal location is associated with a large reward. The reorganization is driven by both rate changes and the appearance and disappearance of place fields. The occurrence of hippocampal replay activity largely followed the dynamics of changes in spatial representations. Replay patterns became more selectively tuned towards behaviorally relevant experiences over the course of learning. These results suggests that high reward value enhances memory retention via accelerating the formation and stabilization of the hippocampal cognitive map and enhancing its reactivation during learning.

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Reward value revealed by auction in rhesus monkeys

10.1101/2019.12.11.872564 ◽

2019 ◽

Cited By ~ 1

Author(s):

Alaa Al-Mohammad ◽

Wolfram Schultz

Keyword(s):

Water Budget ◽

Rhesus Monkeys ◽

Single Trial ◽

Economic Choice ◽

Subjective Value ◽

Reward Value ◽

Binary Choices ◽

Procedural Invariance ◽

Individual Choices

AbstractEconomic choice is thought to involve the elicitation of the private and subjective values of various choice options. Thus far, the estimation of subjective values in animals has relied upon repeated choices and was expressed as an average from dozens of stochastic decisions. However, decisions are made moment-to-moment, and their consequences are usually felt immediately. Here we describe a Becker-DeGroot-Marschak (BDM) auction-like mechanism that encourages animals to truthfully reveal their subjective value in individual choices. The monkeys reliably placed well-ranked BDM bids for up to five juice volumes while paying from a water budget. The bids closely approximated the average subjective values estimated with conventional binary choices, thus demonstrating procedural invariance and aligning with the wealth of knowledge acquired with these less direct estimates. The feasibility of BDM bidding in monkeys encourages single-trial neuronal studies and bridges the gap to the widely used BDM method in human neuroeconomics.

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Enhancing Spatial Ability Through Sport Practice

Journal of Individual Differences ◽

10.1027/1614-0001/a000075 ◽

2012 ◽

Vol 33 (2) ◽

pp. 83-88 ◽

Cited By ~ 58

Author(s):

David Moreau ◽

Jérome Clerc ◽

Annie Mansy-Dannay ◽

Alain Guerrien

Keyword(s):

Mental Rotation ◽

Spatial Representations ◽

Mental Rotation Test ◽

Sport Training ◽

Sport Practice ◽

Undergraduate University Students ◽

Before And After ◽

Cognitive Plasticity ◽

Reported Data ◽

The Relationship

This experiment investigated the relationship between mental rotation and sport training. Undergraduate university students (n = 62) completed the Mental Rotation Test ( Vandenberg & Kuse, 1978 ), before and after a 10-month training in two different sports, which either involved extensive mental rotation ability (wrestling group) or did not (running group). Both groups showed comparable results in the pretest, but the wrestling group outperformed the running group in the posttest. As expected from previous studies, males outperformed women in the pretest and the posttest. Besides, self-reported data gathered after both sessions indicated an increase in adaptive strategies following training in wrestling, but not subsequent to training in running. These findings demonstrate the significant effect of training in particular sports on mental rotation performance, thus showing consistency with the notion of cognitive plasticity induced from motor training involving manipulation of spatial representations. They are discussed within an embodied cognition framework.

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