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@ARTICLE{Endepols:1030872,
author = {Endepols, Heike and Apetz, Nadine and Vieth, Lukas and
Lesser, Christoph and Schulte-Holtey, Léon and Neumaier,
Bernd and Drzezga, Alexander},
title = {{C}erebellar {M}etabolic {C}onnectivity during {T}readmill
{W}alking before and after {U}nilateral {D}opamine
{D}epletion in {R}ats},
journal = {International journal of molecular sciences},
volume = {25},
number = {16},
issn = {1422-0067},
address = {Basel},
publisher = {Molecular Diversity Preservation International},
reportid = {FZJ-2024-05481},
pages = {8617},
year = {2024},
abstract = {Compensatory changes in brain connectivity keep motor
symptoms mild in prodromalParkinson’s disease. Studying
compensation in patients is hampered by the steady
progression ofthe disease and a lack of individual baseline
controls. Furthermore, combining fMRI with walkingis
intricate. We therefore used a seed-based metabolic
connectivity analysis based on
2-deoxy-2-[18F]fluoro-D-glucose ([18F]FDG) uptake in a
unilateral 6-OHDA rat model. At baseline and in thechronic
phase 6–7 months after lesion, rats received an
intraperitoneal injection of [18F]FDG andspent 50 min
walking on a horizontal treadmill, followed by a brain
PET-scan under anesthesia. Highactivity was found in the
cerebellar anterior vermis in both conditions. At baseline,
the anterior vermisshowed hardly any stable connections to
the rest of the brain. The (future) ipsilesional
cerebellarhemisphere was not particularly active during
walking but was extensively connected to many brainareas.
After unilateral dopamine depletion, rats still walked
normally without obvious impairments.The ipsilesional
cerebellar hemisphere increased its activity, but narrowed
its connections down tothe vestibulocerebellum, probably
aiding lateral stability. The anterior vermis established a
networkinvolving the motor cortex, hippocampus and thalamus.
Adding those regions to the vermis networkof (previously)
automatic control of locomotion suggests that after
unilateral dopamine depletionconsiderable conscious and
cognitive effort has to be provided to achieve stable
walking.},
cin = {INM-5 / INM-2},
ddc = {540},
cid = {I:(DE-Juel1)INM-5-20090406 / I:(DE-Juel1)INM-2-20090406},
pnm = {5253 - Neuroimaging (POF4-525) / 5252 - Brain Dysfunction
and Plasticity (POF4-525)},
pid = {G:(DE-HGF)POF4-5253 / G:(DE-HGF)POF4-5252},
typ = {PUB:(DE-HGF)16},
pubmed = {39201305},
UT = {WOS:001305656000001},
doi = {10.3390/ijms25168617},
url = {https://juser.fz-juelich.de/record/1030872},
}