Purkinje cell activity during classical conditioning with different conditional stimulus explains central tenet of Rescorla-Wagner model.
Författare
Summary, in English
A central tenet of Rescorla and Wagner's model of associative learning is that the reinforcement value of a paired trial diminishes as the associative strength between the presented stimuli increases. Despite its fundamental importance to behavioral sciences, the neural mechanisms underlying the model have not been fully explored. Here, we present findings that, taken together, can explain why a stronger association leads to a reduced reinforcement value, within the context of eyeblink conditioning. Specifically, we show that learned pause responses in Purkinje cells, which trigger adaptively timed conditioned eyeblinks, suppress the unconditional stimulus (US) signal in a graded manner. Furthermore, by examining how Purkinje cells respond to two distinct conditional stimuli and to a compound stimulus, we provide evidence that could potentially help explain the somewhat counterintuitive overexpectation phenomenon, which was derived from the Rescorla-Wagner model.
Avdelning/ar
Publiceringsår
2015
Språk
Engelska
Sidor
14060-14065
Publikation/Tidskrift/Serie
Proceedings of the National Academy of Sciences
Volym
112
Issue
45
Länkar
Dokumenttyp
Artikel i tidskrift
Förlag
National Academy of Sciences
Ämne
- Behavioral Sciences Biology
- Neurosciences
Status
Published
Projekt
- Thinking in Time: Cognition, Communication and Learning
Forskningsgrupp
- Associative Learning
ISBN/ISSN/Övrigt
- ISSN: 1091-6490