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Purpose: This study aimed to explore the spontaneous brain activity in patients with diabetic optic neuropathy (DON) by using the amplitude of low-frequency fluctuation (ALFF) technique.
Methods: Sixteen DON patients and 16 age- and sex-matched healthy controls (HCs) were recruited. ALFF along with functional MRI method was used to detect the intrinsic brain activity alterations. The mean values of ALFF in DON patients and HCs were analyzed by receiver operating characteristic (ROC) curves. Pearson's correlation analysis was used to determine the correlation between Hospital Anxiety and Depression Scale (HADS) and ALFF values of DONs.
Results: The DON group showed significantly increased ALFF values in the fusiform gyrus, and decreased ALFF values in the medial frontal gyrus/left frontal superior orbit/right frontal medial orbit, and left frontal inferior triangle. ROC curve analysis indicated that the accuracy of AUC was good. The anxiety scale and depression scale of the DON group were negatively correlated with the ALFF values of the medial frontal gyrus.
Conclusion: DON is a neurodegenerative disease involving multiple brain regions. The abnormal activity of neurons in these brain regions helps to reveal the underlying neural mechanisms of brain activity related to DON.
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http://dx.doi.org/10.2147/DMSO.S423111 | DOI Listing |
Sleep Med
August 2025
Department of Radiology Imaging Center, Renmin Hospital, Hubei University of Medicine, Shiyan, Hubei, 442000, PR China. Electronic address:
Objective: This multicenter study aimed to investigate resting-state brain functional alterations in patients with type 2 diabetes mellitus (T2DM) comorbid with obstructive sleep apnea (OSA), and to elucidate the underlying neural mechanisms.
Methods: A total of 139 participants were enrolled from two centers, including 48 healthy controls (HCs), 46 T2DM patients, and 45 T2DM with OSA patients. Resting-state functional magnetic resonance imaging (rs-fMRI) was used to assess brain function using degree centrality (DC), amplitude of low-frequency fluctuation (ALFF), and seed-based functional connectivity (FC).
J Neuroimaging
September 2025
Department of Radiology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan.
Background And Purpose: This study aims to characterize hemodynamic alterations in gliomas by analyzing global signal metrics and amplitude of low-frequency fluctuations (ALFF).
Methods: We analyzed resting-state functional MRI data from an open dataset. A total of 29 glioma patients (17 men; mean age: 44.
Quant Imaging Med Surg
September 2025
Department of Radiology, Nanjing First Hospital, Nanjing Medical University, Nanjing, China.
Background: Chemotherapy-related cognitive impairments (CRCIs) are frequently reported by patients with non-small cell lung cancer (NSCLC) following chemotherapy treatment. Studies have revealed that cognitive impairment may be linked to abnormal spontaneous neuronal activity and changes in cerebral blood flow (CBF). However, the specific impact of neurovascular coupling (NVC) alterations on patients who have undergone chemotherapy has not been clarified.
View Article and Find Full Text PDFBrain Connect
September 2025
Department of Neurology, The Second Affiliated Hospital of Xuzhou Medical University, Xuzhou, China.
To explore brain function differences between patients with residual dizziness (RD) caused by benign paroxysmal positional vertigo (BPPV) and persistent postural-perceptual dizziness (PPPD) with resting-state functional magnetic resonance imaging. Using the Data Processing and Analysis for Brain Imaging software to analyze differences in the amplitude of low-frequency fluctuations (ALFF) and functional connectivity (FC) among RD, PPPD, and healthy controls groups. Then constructed a brain network and compared FC within the network.
View Article and Find Full Text PDFBrain Res Bull
August 2025
State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology Visual Science, Guangdong Provincial Clinical Research Center for Ocular Diseases, Guangzhou, China. Electronic address:
Background: Primary open-angle glaucoma (POAG) is one of the predominant causes of irreversible blindness. Though the glaucomatous transneuronal degeneration pass through the lateral geniculate nucleus (LGN) in the visual pathway, the functional changes associated with the LGN remains elusive. The current study aimed to investigate the seed-based whole-brain functional connectivity (FC) of the LGN and its correlation with retinal thickness in patients with POAG.
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