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What is stored in the hippocampus during a tactile categorization task?

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Diamond M., Itskov P., Vinnik E.

Acta Neurobiologiae Experimentalis

2009

tom 69

nr 3

To understand how sensory experiences are stored in the brain, we examined neuronal fi ring in hippocampus during tactile behavior. Rats learned to associate stimulus texture with reward location; multiple textures were associated with the same reward location and thus formed a behavioral category. Rapid fi ring rate modulation carried texture identity information (10% of neurons), free from spatial and behavioral confounds; slow fi ring rate modulation carried behavioral category information (63% of neurons). Category information appeared during texture contact, simultaneous with an increase in theta power in the local fi eld potential; it persisted or recurred during reward collection, when theta power was suppressed and “reward neurons” (8%) fi red. Reward-triggered recurrence of category information could be a mechanism to link stimulus, action, and outcome when separated in time.

Ograniczanie wyników

1 Acta Neurobiologiae Experimentalis

1 Diamond M.

1 Itskov P.

1 Vinnik E.

1 2009

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What is stored in the hippocampus during a tactile categorization task?