Document Detail

Parvalbumin-Expressing Interneurons Linearly Control Olfactory Bulb Output.
MedLine Citation:
PMID:  24239124     Owner:  NLM     Status:  Publisher    
In the olfactory bulb, odor representations by principal mitral cells are modulated by local inhibitory circuits. While dendrodendritic synapses between mitral and granule cells are typically thought to be a major source of this modulation, the contributions of other inhibitory neurons remain unclear. Here we demonstrate the functional properties of olfactory bulb parvalbumin-expressing interneurons (PV cells) and identify their important role in odor coding. Using paired recordings, we find that PV cells form reciprocal connections with the majority of nearby mitral cells, in contrast to the sparse connectivity between mitral and granule cells. In vivo calcium imaging in awake mice reveals that PV cells are broadly tuned to odors. Furthermore, selective PV cell inactivation enhances mitral cell responses in a linear fashion while maintaining mitral cell odor preferences. Thus, dense connections between mitral and PV cells underlie an inhibitory circuit poised to modulate the gain of olfactory bulb output.
Hiroyuki K Kato; Shea N Gillet; Andrew J Peters; Jeffry S Isaacson; Takaki Komiyama
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-11-12
Journal Detail:
Title:  Neuron     Volume:  -     ISSN:  1097-4199     ISO Abbreviation:  Neuron     Publication Date:  2013 Nov 
Date Detail:
Created Date:  2013-11-18     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8809320     Medline TA:  Neuron     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2013 Elsevier Inc. All rights reserved.
Center for Neural Circuits and Behavior and Department of Neurosciences, University of California, San Diego, La Jolla, CA 92093, USA.
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