Early functional connectivity alterations in contralesional motor networks influence outcome after severe stroke: a preliminary analysis
Standard
Early functional connectivity alterations in contralesional motor networks influence outcome after severe stroke: a preliminary analysis. / Braaß, Hanna; Gutgesell, Lily; Backhaus, Winifried; Higgen, Focko; Quandt, Fanny; Choe, Chi-un; Gerloff, Christian; Schulz, Robert.
In: SCI REP-UK, Vol. 13, No. 1, 11010, 07.07.2023, p. 11010.Research output: SCORING: Contribution to journal › SCORING: Journal article › Research › peer-review
Harvard
APA
Vancouver
Bibtex
}
RIS
TY - JOUR
T1 - Early functional connectivity alterations in contralesional motor networks influence outcome after severe stroke: a preliminary analysis
AU - Braaß, Hanna
AU - Gutgesell, Lily
AU - Backhaus, Winifried
AU - Higgen, Focko
AU - Quandt, Fanny
AU - Choe, Chi-un
AU - Gerloff, Christian
AU - Schulz, Robert
PY - 2023/7/7
Y1 - 2023/7/7
N2 - Connectivity studies have significantly extended the knowledge on motor network alterations after stroke. Compared to interhemispheric or ipsilesional networks, changes in the contralesional hemisphere are poorly understood. Data obtained in the acute stage after stroke and in severely impaired patients are remarkably limited. This exploratory, preliminary study aimed to investigate early functional connectivity changes of the contralesional parieto-frontal motor network and their relevance for the functional outcome after severe motor stroke. Resting-state functional imaging data were acquired in 19 patients within the first 2 weeks after severe stroke. Nineteen healthy participants served as a control group. Functional connectivity was calculated from five key motor areas of the parieto-frontal network on the contralesional hemisphere as seed regions and compared between the groups. Connections exhibiting stroke-related alterations were correlated with clinical follow-up data obtained after 3–6 months. The main finding was an increase in coupling strength between the contralesional supplementary motor area and the sensorimotor cortex. This increase was linked to persistent clinical deficits at follow-up. Thus, an upregulation in contralesional motor network connectivity might be an early pattern in severely impaired stroke patients. It might carry relevant information regarding the outcome which adds to the current concepts of brain network alterations and recovery processes after severe stroke.
AB - Connectivity studies have significantly extended the knowledge on motor network alterations after stroke. Compared to interhemispheric or ipsilesional networks, changes in the contralesional hemisphere are poorly understood. Data obtained in the acute stage after stroke and in severely impaired patients are remarkably limited. This exploratory, preliminary study aimed to investigate early functional connectivity changes of the contralesional parieto-frontal motor network and their relevance for the functional outcome after severe motor stroke. Resting-state functional imaging data were acquired in 19 patients within the first 2 weeks after severe stroke. Nineteen healthy participants served as a control group. Functional connectivity was calculated from five key motor areas of the parieto-frontal network on the contralesional hemisphere as seed regions and compared between the groups. Connections exhibiting stroke-related alterations were correlated with clinical follow-up data obtained after 3–6 months. The main finding was an increase in coupling strength between the contralesional supplementary motor area and the sensorimotor cortex. This increase was linked to persistent clinical deficits at follow-up. Thus, an upregulation in contralesional motor network connectivity might be an early pattern in severely impaired stroke patients. It might carry relevant information regarding the outcome which adds to the current concepts of brain network alterations and recovery processes after severe stroke.
U2 - 10.1038/s41598-023-38066-0
DO - 10.1038/s41598-023-38066-0
M3 - SCORING: Journal article
C2 - 37419966
VL - 13
SP - 11010
JO - SCI REP-UK
JF - SCI REP-UK
SN - 2045-2322
IS - 1
M1 - 11010
ER -