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Spike Transmission and Synchrony Detection in Networks of GABAergic Interneurons
Mario Galarreta,1*Shaul Hestrin12
The temporal pattern and relative timing of action potentials among
neocortical neurons may carry important information. However,how
cortical circuits detect or generate coherent activity remainsunclear.
Using paired recordings in rat neocortical slices, wefound that the
firing of fast-spiking cells can reflect the spikingpattern of
single-axon pyramidal inputs. Moreover, this propertyallowed groups of
fast-spiking cells interconnected by electricaland -aminobutyric
acid (GABA)-releasing (GABAergic) synapsesto detect the
relative timing of their excitatory inputs. Theseresults indicate that
networks of fast-spiking cells may playa role in the detection and
promotion of synchronous activitywithin the neocortex.
1 Department of Comparative Medicine,
2 Department of Neurology and Neurological Sciences,
Stanford University School of Medicine, Stanford, CA 94305, USA.
*
To whom correspondence should be addressed. E-mail:
galarreta{at}stanford.edu
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