Abstract
This study aimed to detect alterations in intra- and inter-network functional connectivity (FC) of multiple networks in acute brainstem ischemic stroke patients, and the relationship between FC and movement assessment scores to assess their ability to predict upper extremity motor impairment. Resting-state functional magnetic resonance imaging (rs-fMRI) data were acquired from acute brainstem ischemic stroke patients (n = 50) and healthy controls (HCs) (n = 45). Resting-state networks (RSNs) were established based on independent component analysis (ICA) and the functional network connectivity (FNC) analysis was performed. Subsequently, correlation analysis was subsequently used to explore the relationship between FNC abnormalities and upper extremity motor impairment. Altered FC within default mode network (DMN), executive control network (ECN), the salience network (SN), auditory network (AN), and cerebellum network (CN) were found in the acute brainstem ischemic stroke group relative to HCs. Moreover, different patterns of altered network interactions were found between the patients and HCs, including the SN-CN, SN-AN, and ECN-DMN connections. Correlations between functional disconnection and upper limb dysfunction measurements in acute brainstem ischemic stroke patients were also found. This study intimated that widespread FNC impairment and altered integration existed in brainstem ischemic stroke at acute stage, suggesting that FNC disruption may be applied for early diagnosis and prediction of upper limb dysfunction in acute brainstem ischemic stroke.
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Funding
This work was supported by the Jiangsu Provincial Special Program of Medical Science (No. BE2021604), Natural Science Foundation of Jiangsu Province (No. BK20201118) and 333 High-level Talents Training Project of Jiangsu Province (No. BRA2019122).
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WG. and JZ. are co-first authors of this paper, they design the experiment, analyze the data and draft the paper for the work. SS., HC. and MS. help to acquire the clinical and fMRI data. LJ. helps to revise the paper critically for important intellectual content. XY. and YCC. are co-corresponding authors of this paper, they did the financial support, review and final approval of the paper to be published. All authors read and approved the final manuscript.
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Geng, W., Zhang, J., Shang, S. et al. Reduced functional network connectivity is associated with upper limb dysfunction in acute ischemic brainstem stroke. Brain Imaging and Behavior 16, 802–810 (2022). https://doi.org/10.1007/s11682-021-00554-0
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DOI: https://doi.org/10.1007/s11682-021-00554-0