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@ARTICLE{Arboit:162924,
author = {Arboit, Alberto and Krautwald, Karla and Angenstein, Frank},
title = {{T}he cholinergic system modulates negative {BOLD}
responses in the prefrontal cortex once electrical perforant
pathway stimulation triggers neuronal afterdischarges in the
hippocampus.},
journal = {Journal of cerebral blood flow $\&$ metabolism},
volume = {42},
number = {2},
issn = {1559-7016},
address = {London},
publisher = {Sage},
reportid = {DZNE-2021-01576},
pages = {364-380},
year = {2022},
note = {(CC BY)},
abstract = {Repeated high-frequency pulse-burst stimulations of the rat
perforant pathway elicited positive BOLD responses in the
right hippocampus, septum and prefrontal cortex. However,
when the first stimulation period also triggered neuronal
afterdischarges in the hippocampus, then a delayed negative
BOLD response in the prefrontal cortex was generated. While
neuronal activity and cerebral blood volume (CBV) increased
in the hippocampus during the period of hippocampal neuronal
afterdischarges (h-nAD), CBV decreased in the prefrontal
cortex, although neuronal activity did not decrease. Only
after termination of h-nAD did CBV in the prefrontal cortex
increase again. Thus, h-nAD triggered neuronal activity in
the prefrontal cortex that counteracted the usual neuronal
activity-related functional hyperemia. This process was
significantly enhanced by pilocarpine, a mACh receptor
agonist, and completely blocked when pilocarpine was
co-administered with scopolamine, a mACh receptor
antagonist. Scopolamine did not prevent the formation of the
negative BOLD response, thus mACh receptors modulate the
strength of the negative BOLD response.},
keywords = {Animals / Cerebrovascular Circulation / Hippocampus: blood
supply / Hippocampus: metabolism / Hyperemia: metabolism /
Male / Muscarinic Agonists: pharmacology / Muscarinic
Antagonists: pharmacology / Neurons: metabolism / Perforant
Pathway: blood supply / Perforant Pathway: metabolism /
Pilocarpine: pharmacology / Prefrontal Cortex: blood supply
/ Prefrontal Cortex: metabolism / Rats / Rats, Wistar /
Scopolamine: pharmacology / Cerebral blood volume (CBV)
(Other) / electrophysiology (Other) / negative BOLD response
(Other) / pilocarpine (Other) / scopolamine (Other)},
cin = {AG Angenstein},
ddc = {610},
cid = {I:(DE-2719)1310004},
pnm = {351 - Brain Function (POF4-351)},
pid = {G:(DE-HGF)POF4-351},
typ = {PUB:(DE-HGF)16},
pmc = {pmc:PMC8795231},
pubmed = {pmid:34590894},
doi = {10.1177/0271678X211049820},
url = {https://pub.dzne.de/record/162924},
}