Dipole-like neuronal sources of theta rhythm in dorsal hippocampus, dendate gyrus and cingulate cortex of the urethane-anesthetized rat = Sources neuronales, de type dipolaire, du rythme thêta dans l'hippocampe dorsal, le gyrus dentatus et le cortex cingulaire du rat anesthésié à l'uréthane

B.W.A. Feenstra, J. Holsheimer

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Abstract

Spatial distribution of theta activity was investigated in the dorsal hippocampal formation and overlying neocortex of the urethaneanesthetized rat. Laminar phase profiles from semi-microelectrode penetrations showed approximately 180° phase shifts combined with small amplitude values in stratum radiatum of CA1, in stratum moleculare of the dentate gyrus and in layer V/VI of the cingulate cortex at theta peak frequency. Evidence has been presented that layers of neurons in CA1, in the dorsal granular layer and in the cinguate cortex are the sources of dipole-like theta field potentials. A strong linear relationship between the neuronal theta sources in hippocampal CA1, dendate area and cingulate cortex was found.
Original languageEnglish
Pages (from-to)532-538
JournalElectroencephalography and clinical neurophysiology
Volume47
Issue number5
DOIs
Publication statusPublished - 1979

Keywords

  • IR-68469

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