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Activation of a Temporal Memory in Purkinje Cells by the mGluR7 Receptor.

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Author

Summary, in English

Cerebellar Purkinje cells can learn to respond to a conditioned stimulus with an adaptively timed pause in firing. This response was usually ascribed to long-term depression of parallel fiber to Purkinje cell synapses but has recently been shown to be due to a previously unknown form of learning involving an intrinsic cellular timing mechanism. Here, we investigate how these responses are elicited. They are resistant to blockade of GABAergic inhibition, suggesting that they are caused by glutamate release rather than by a changed balance between GABA and glutamate. We show that the responses are abolished by antagonists of the mGlu7 receptor but not significantly affected by other glutamate antagonists. These results support the existence of a distinct learning mechanism, different from changes in synaptic strength. They also demonstrate in vivo post-synaptic inhibition mediated by glutamate and show that the mGlu7 receptor is involved in activating intrinsic temporal memory.

Publishing year

2015

Language

English

Pages

1741-1746

Publication/Series

Cell Reports

Volume

13

Issue

9

Document type

Journal article

Publisher

Cell Press

Topic

  • Neurosciences

Status

Published

Project

  • Thinking in Time: Cognition, Communication and Learning

Research group

  • Associative Learning

ISBN/ISSN/Other

  • ISSN: 2211-1247