On the formation of gamma-coherent cell assemblies by oriens lacunosum-moleculare interneurons in the hippocampus.

On the formation of gamma-coherent cell assemblies by oriens lacunosum-moleculare interneurons in the hippocampus. Research Abstract Details 

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On the formation of gamma-coherent cell assemblies by oriens lacunosum-moleculare interneurons in the hippocampus. Abstract Text:

Adriano B L Tort,Horacio G Rotstein,Tamar Dugladze,Tengis Gloveli,Nancy J Kopell,

Gamma frequency (30-80 Hz) network oscillations have been observed in the hippocampus during several behavioral paradigms in which they are often modulated by a theta frequency (4-12 Hz) oscillation. Interneurons of the hippocampus have been shown to be crucially involved in rhythms generation, and several subtypes with distinct anatomy and physiology have been described. In particular, the oriens lacunosum-moleculare (O-LM) interneurons were shown to synapse on distal apical dendrites of pyramidal cells and to spike preferentially at theta frequency, even in the presence of gamma-field oscillations. O-LM cells have also recently been shown to present higher axonal ramification in the longitudinal axis of the hippocampus. By using a hippocampal network model composed of pyramidal cells and two types of interneurons (O-LM and basket cells), we show here that the O-LM interneurons lead to gamma coherence between anatomically distinct cell modules. We thus propose that this could be a mechanism for coupling longitudinally distant cells excited by entorhinal cortex inputs into gamma-coherent assemblies.

On the formation of gamma-coherent cell assemblies by oriens lacunosum-moleculare interneurons in the hippocampus. Publishing Authors By Initials

AB Tort,HG Rotstein,T Dugladze,T Gloveli,NJ Kopell,

For similar nervous system: synapses research abstracts see: nervous system: synapses research

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On the formation of gamma-coherent cell assemblies by oriens lacunosum-moleculare interneurons in the hippocampus. Journal Published:

PUBLICATION TYPE: Research Support, U.S. Gov't,

Journal: Proceedings of the National Academy of Sciences of

VOLUME: 104

Page Numbers: 13490-5

Journal Abbreviation: Proc. Natl. Acad. Sci. U.S.A.

ISSN: 0027-8424

DAY: 6

MONTH: 08

YEAR: 2007

On the formation of gamma-coherent cell assemblies by oriens lacunosum-moleculare interneurons in the hippocampus. Information

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LANGUAGE: eng

NlmUniqueID: 7505876

On the formation of gamma-coherent cell assemblies by oriens lacunosum-moleculare interneurons in the hippocampus. Keywords Mesh Terms:

KEYWORDS: Synapses

MESH TERMS: cytology

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Grant and Affiliation Information for On the formation of gamma-coherent cell assemblies by oriens lacunosum-moleculare interneurons in the hippocampus.

AFFILIATION: Department of Mathematics and Center for Biodynamics, Boston University, Boston, MA 02215, USA. tort@bu.edu

Country: United States

AGENCY: United States NINDS

GRANT: R01 NS46058

ACRONYM: NS

MEDLINETA: Proc Natl Acad Sci U S A

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