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@ARTICLE{Dannenberg:138023,
author = {Dannenberg, Holger and Pabst, Milan and Braganza, Oliver
and Schoch, Susanne and Niediek, Johannes and Bayraktar,
Melike and Mormann, Florian and Beck, Heinz},
title = {{S}ynergy of direct and indirect cholinergic
septo-hippocampal pathways coordinates firing in hippocampal
networks.},
journal = {The journal of neuroscience},
volume = {35},
number = {22},
issn = {0270-6474},
address = {Washington, DC},
publisher = {Soc.57413},
reportid = {DZNE-2020-04345},
pages = {8394-8410},
year = {2015},
abstract = {The medial septum/diagonal band of Broca complex (MSDB) is
a key structure that modulates hippocampal rhythmogenesis.
Cholinergic neurons of the MSDB play a central role in
generating and pacing theta-band oscillations in the
hippocampal formation during exploration, novelty detection,
and memory encoding. How precisely cholinergic neurons
affect hippocampal network dynamics in vivo, however, has
remained elusive. In this study, we show that stimulation of
cholinergic MSDB neurons in urethane-anesthetized mice acts
on hippocampal networks via two distinct pathways. A direct
septo-hippocampal cholinergic projection causes increased
firing of hippocampal inhibitory interneurons with
concomitantly decreased firing of principal cells. In
addition, cholinergic neurons recruit noncholinergic neurons
within the MSDB. This indirect pathway is required for
hippocampal theta synchronization. Activation of both
pathways causes a reduction in pyramidal neuron firing and a
more precise coupling to the theta oscillatory phase. These
two anatomically and functionally distinct pathways are
likely relevant for cholinergic control of encoding versus
retrieval modes in the hippocampus.},
keywords = {Acetylcholine: metabolism / Action Potentials: genetics /
Animals / Channelrhodopsins / Choline O-Acetyltransferase:
genetics / Choline O-Acetyltransferase: metabolism /
Cholinergic Neurons: drug effects / Cholinergic Neurons:
physiology / Dependovirus: genetics / Heart Rate: drug
effects / Heart Rate: genetics / Hippocampus: cytology /
Hippocampus: physiology / Mice / Mice, Transgenic / Neural
Pathways: drug effects / Neural Pathways: physiology /
Neurons: physiology / Parvalbumins: genetics / Parvalbumins:
metabolism / Photic Stimulation / Photoacoustic Techniques /
Septal Nuclei: physiology / Theta Rhythm: genetics / Theta
Rhythm: physiology / Time Factors / Transduction, Genetic /
Channelrhodopsins (NLM Chemicals) / Parvalbumins (NLM
Chemicals) / Choline O-Acetyltransferase (NLM Chemicals) /
Acetylcholine (NLM Chemicals)},
cin = {U Preclinical Researchers - Bonn},
ddc = {610},
cid = {I:(DE-2719)7000005},
pnm = {342 - Disease Mechanisms and Model Systems (POF3-342)},
pid = {G:(DE-HGF)POF3-342},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:26041909},
pmc = {pmc:PMC6605336},
doi = {10.1523/JNEUROSCI.4460-14.2015},
url = {https://pub.dzne.de/record/138023},
}