Driving fast-spiking cells induces gamma rhythm and controls sensory responses

By Jessica A. Cardin, M. Carlén, K. Meletis, Ulf Knoblich, Feng Zhang, Feng Zhang, Karl Deisseroth, Li-Huei Tsai, C. Moore. Nature, 2009

2,642 citations recorded by the source corpus.

Cortical gamma oscillations (20-80 Hz) predict increases in focused attention, and failure in gamma regulation is a hallmark of neurological and psychiatric disease. Current theory predicts that gamma oscillations are generated by synchronous activity of fast-spiking inhibitory interneurons, with the resulting rhythmic inhibition producing neural ensemble synchrony by generating a narrow window for effective excitation. We causally tested these hypotheses in barrel cortex in vivo by targeting optogenetic manipulation selectively to fast-spiking interneurons. Here we show that light-driven activation of fast-spiking interneurons at varied frequencies (8-200 Hz) selectively amplifies gamma oscillations. In contrast, pyramidal neuron activation amplifies only lower frequency oscillations, a cell-type-specific double dissociation. We found that the timing of a sensory input relative to a gamma cycle determined the amplitude and precision of evoked responses. Our data directly support the fast-spiking-gamma hypothesis and provide the first causal evidence that distinct network activity states can be induced in vivo by cell-type-specific activation.

Subfields: Cellular and Molecular Neuroscience, Cognitive Neuroscience

View Paper: https://www.semanticscholar.org/paper/78b495a6f48863ed5d8445af0a71c05bbe285049

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In Cellular and Molecular Neuroscience

  1. György Buzsáki
  2. Karl Deisseroth
  3. Martin A. Vinck
  4. Xiao-Jing Wang
  5. Ole Jensen
  6. Pascal Fries
  7. Nikos K. Logothetis
  8. Wolf Singer

In Cognitive Neuroscience

  1. Xiao-Jing Wang
  2. György Buzsáki
  3. Martin A. Vinck
  4. Justin Riddle
  5. Ole Jensen
  6. Marcus E. Raichle
  7. Pascal Fries
  8. Karl Deisseroth

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