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@ARTICLE{Arboit:281504,
author = {Arboit, Alberto and Krautwald, Karla and Angenstein, Frank},
title = {{A}cetaminophen affects the duration but not the occurrence
of {BOLD} signal decline in the dorsal hippocampus after
induction of neuronal afterdischarges.},
journal = {Imaging neuroscience},
volume = {3},
issn = {2837-6056},
address = {Cambridge, MA},
publisher = {MIT Press},
reportid = {DZNE-2025-01125},
pages = {IMAG.a.161},
year = {2025},
abstract = {Combined in vivo electrophysiological and functional
magnetic resonance imaging (fMRI) measurements were used to
monitor neuronal and hemodynamic responses in the right
dorsal hippocampus during and after electrical stimulation
of the right perforant pathway with a short period of 20 Hz
pulses. These measurements were performed under two
conditions: $1.5\%$ isoflurane (which has a long-term
vasodilator effect) or 100 µg/kg medetomidine (which has a
long-term vasoconstrictor effect). The stimulation elicited
a short period of neuronal afterdischarges (nAD) followed by
a sustained decline in fMRI BOLD signals, as previously
described (Arboit et al., 2024). While the duration of nAD
was similar in presence of isoflurane and medetomidine, the
subsequent decline of BOLD signal was significantly longer
with isoflurane than with medetomidine. However, when the
same experiments were performed in the presence of
acetaminophen, the duration of the sustained decline of BOLD
signals became similar: acetaminophen significantly
prolonged the decline in the presence of medetomidine,
whereas it only slightly shortened it in the presence of
isoflurane. As acetaminophen did not affect the generation
and intensity of nAD, the results indicate that nAD
activates at least two different neurovascular coupling
(NVC) mechanisms that mediate the sustained BOLD signal
decline, of which acetaminophen affects the maintenance.},
keywords = {BOLD-fMRI (Other) / dentate gyrus (Other) / in vivo
electrophysiology (Other) / negative BOLD response (Other) /
neurovascular coupling (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},
pubmed = {pmid:40995462},
pmc = {pmc:PMC12455054},
doi = {10.1162/IMAG.a.161},
url = {https://pub.dzne.de/record/281504},
}