The analysis of brain functional connectivity of post-stroke cognitive impairment patients: an fNIRS study

Post-stroke cognitive impairment (PSCI) is a considerable risk factor for developing dementia and reoccurrence of stroke. Understanding the neural mechanisms of cognitive impairment after stroke can facilitate early identification and intervention. Using functional near-infrared spectroscopy (fNRIS)...

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Bibliographic Details
Published in:Frontiers in neuroscience 2023-05, Vol.17, p.1168773-1168773
Main Authors: Zou, Jiahuan, Yin, Yongyan, Lin, Zhenfang, Gong, Yulai
Format: Article
Language:English
Subjects:
assessment
Brain
Cerebral hemispheres
Cognitive ability
Cortex (somatosensory)
Dementia disorders
functional connectivity
functional near-infrared spectroscopy
Hemispheric laterality
Infrared spectroscopy
Magnetic resonance imaging
Medical imaging
Neural networks
Neuroimaging
Neuroscience
Patients
post-stroke cognitive impairment
Prefrontal cortex
Rehabilitation
Risk factors
Stroke
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Summary:Post-stroke cognitive impairment (PSCI) is a considerable risk factor for developing dementia and reoccurrence of stroke. Understanding the neural mechanisms of cognitive impairment after stroke can facilitate early identification and intervention. Using functional near-infrared spectroscopy (fNRIS), the present study aimed to examine whether resting-state functional connectivity (FC) of brain networks differs in patients with PSCI, patients with Non-PSCI (NPSCI), and healthy controls (HCs), and whether these features could be used for clinical diagnosis of PSCI. The present study recruited 16 HCs and 32 post-stroke patients. Based on the diagnostic criteria of PSCI, post-stroke patients were divided to the PSCI or NPSCI group. All participants underwent a 6-min resting-state fNRIS test to measure the hemodynamic responses from regions of interests (ROIs) that were primarily distributed in the prefrontal, somatosensory, and motor cortices. The results showed that, when compared to the HC group, the PSCI group exhibited significantly decreased interhemispheric FC and intra-right hemispheric FC. ROI analyses showed significantly decreased FC among the regions of somatosensory cortex, dorsolateral prefrontal cortex, and medial prefrontal cortex for the PSCI group than for the HC group. However, no significant difference was found in the FC between the PSCI and the NPSCI groups. Our findings provide evidence for compromised interhemispheric and intra-right hemispheric functional connectivity in patients with PSCI, suggesting that fNIRS is a promising approach to investigate the effects of stroke on functional connectivity of brain networks.
ISSN:1662-4548
1662-453X
1662-453X
DOI:10.3389/fnins.2023.1168773