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Optogenetic Entrainment of Hippocampal Theta Oscillations in Behaving Mice
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Gamma oscillations in the midbrain spatial attention network: linking circuits to function.

Devarajan Sridharan1, Eric I Knudsen1

  • 1Department of Neurobiology, Stanford University School of Medicine, Stanford, CA 94305, United States.

Current Opinion in Neurobiology
|December 9, 2014
PubMed
Summary
This summary is machine-generated.

This review details avian optic tectum (OT) neural circuits generating gamma oscillations, crucial for spatial attention. Similarities to mammalian brain gamma rhythms offer insights into neural coding.

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Area of Science:

  • Neuroscience
  • Comparative neurobiology
  • Neural oscillations

Background:

  • Gamma-band oscillations (25-140Hz) are vital for mammalian brain functions like attention and memory.
  • The optic tectum (OT) is a key midbrain structure for spatial attention control.

Purpose of the Study:

  • To review recent advances in understanding avian OT neural circuits.
  • To characterize the generation and regulation of gamma oscillations in the avian OT.

Main Methods:

  • In vivo and in vitro electrophysiological recordings in avian OT.
  • Analysis of physiological and pharmacological mechanisms.

Main Results:

  • Identification of neural circuits producing large amplitude, space-specific gamma oscillations in the avian OT.
  • Characterization of mechanisms regulating these oscillations.

Conclusions:

  • Avian OT gamma oscillations share similarities with mammalian neocortical and hippocampal rhythms.
  • These similarities provide insights into the functional significance of midbrain gamma oscillatory codes.