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Fei N, Wang Y, Yang B, Zhang C, Chang D, Liu Z, Cheng L, Fu T, Xian J. Structural and spontaneous functional brain changes in visual and oculomotor areas identified by functional localization task in intermittent exotropia children. Brain Res 2023; 1819:148543. [PMID: 37611887 DOI: 10.1016/j.brainres.2023.148543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2023] [Revised: 08/18/2023] [Accepted: 08/19/2023] [Indexed: 08/25/2023]
Abstract
Intermittent exotropia (IXT) is characterizedby an intermittent outward deviation of the eyes. Yet, the neural substrates associated with IXT are not fully understood. This study investigated brain structure and spontaneous functional activity changes in children with IXT. All participants underwent detailed ophthalmological examinations and multimodal magnetic resonance imaging (MRI) scanning. During functional scanning, binocular visual stimuli were presented to subjects to determine brain areas involved in visual and oculomotor processing. Regions of interest(ROI) were subsequently selected based on functional activation to investigate brain structural and spontaneous functional differences between IXT children and healthy controls (HCs) using small volume correction (SVC). Reduced gray matter density (GMD) was found in the right frontal eye field (FEF) and bilateral inferior parietal lobe (IPL) in IXT children compared with HCs. Besides, reduced fractional amplitude of low-frequency fluctuations (fALFF) values were observed in the left lingual gyrus, right inferior occipital gyrus (IOG), bilateral IPL, and bilateral cerebellum in the IXT children compared to the HCs. IXT children with worse eye position control ability exhibited lower GMD and fALFF values in these areas. Finally, resting state functional connectivity (RSFC) was reduced in frontoparietal oculomotor processing areas in IXT children compared to HCs. In addition, increased cortical thickness was found in the right visual areas and bilateral IPL. These results showed that IXT-related structural and functional brain abnormalities occurred in childhood and may be related to underlying neuropathological mechanisms.
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Affiliation(s)
- Nanxi Fei
- Department of Radiology, Beijing Tongren Hospital, Capital Medical University, 100730 Beijing, China
| | - Yachen Wang
- Department of Ophthalmology, Beijing Tongren Hospital, Capital Medical University, 100730 Beijing, China; Beijing Ophthalmology & Visual Sciences Key Laboratory, 100730 Beijing, China
| | - Bingbing Yang
- Department of Radiology, Beijing Tongren Hospital, Capital Medical University, 100730 Beijing, China
| | - Chen Zhang
- MR Scientific Marketing, Siemens Healthineers Ltd, 7, Wangjing Zhonghuan South Road, Chaoyang District, 100102 Beijing, China
| | - Di Chang
- Department of Ophthalmology, Beijing Tongren Hospital, Capital Medical University, 100730 Beijing, China; Beijing Ophthalmology & Visual Sciences Key Laboratory, 100730 Beijing, China
| | - Zhihan Liu
- Department of Ophthalmology, Beijing Tongren Hospital, Capital Medical University, 100730 Beijing, China; Beijing Ophthalmology & Visual Sciences Key Laboratory, 100730 Beijing, China
| | - Luyao Cheng
- Department of Ophthalmology, Beijing Tongren Hospital, Capital Medical University, 100730 Beijing, China; Beijing Ophthalmology & Visual Sciences Key Laboratory, 100730 Beijing, China
| | - Tao Fu
- Department of Ophthalmology, Beijing Tongren Hospital, Capital Medical University, 100730 Beijing, China; Beijing Ophthalmology & Visual Sciences Key Laboratory, 100730 Beijing, China.
| | - Junfang Xian
- Department of Radiology, Beijing Tongren Hospital, Capital Medical University, 100730 Beijing, China.
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Guo J, Chen Y, Liu W, Huang L, Hu D, Lv Y, Kang H, Li N, Peng Y. Alterations of large-scale functional network connectivity in patients with infantile esotropia before and after surgery. Brain Behav 2023; 13:e3154. [PMID: 37433043 PMCID: PMC10454265 DOI: 10.1002/brb3.3154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Revised: 06/27/2023] [Accepted: 06/29/2023] [Indexed: 07/13/2023] Open
Abstract
BACKGROUND Growing evidences have indicated neurodevelopmental disorders in infantile esotropia (IE). However, few studies have analyzed the characteristics of large-scale functional networks of IE patients or their postoperative network-level alterations. METHODS Here, individuals with IE (n = 32) and healthy subjects (n = 30) accomplished the baseline clinical examinations and resting-state MRI scans. A total of 17 IE patients also underwent corrective surgeries and completed the longitudinal clinical assessments and resting-state MRI scans. Linear mixed effects models were applied for cross-sectional and longitudinal network-level analyses. Correlation analysis was performed to assess the relationship between longitudinal functional connectivity (FC) alterations and baseline clinical variables. RESULTS In cross-sectional analyses, network-level FC were apparently aberrant in IE patients compared to controls. In longitudinal analyses, intra- and internetwork connectivity were observed with significant alterations in postoperative IE patients compared to the preoperative counterparts. Longitudinal FC changes are negatively correlated to the age at surgery in IE. CONCLUSIONS Obviously, altered network-level FC benefiting from the corrective surgery serves as the neurobiological substrate of the observed improvement of stereovision, visuomotor coordination, and emotional management in postoperative IE patients. Corrective surgery should be performed as early as possible to obtain more benefits for IE in brain function recovery.
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Affiliation(s)
- Jianlin Guo
- Department of Radiology, MOE Key Laboratory of Major Diseases in ChildrenBeijing Children's Hospital, Capital Medical University, National Center for Children's HealthBeijingP. R. China
| | - Yuanyuan Chen
- Tianjin International Joint Research Center for Neural EngineeringAcademy of Medical Engineering and Translational Medicine, Tianjin UniversityTianjinP. R. China
| | - Wen Liu
- Department of OphthalmologyBeijing Children's HospitalCapital Medical University, National Center for Children's HealthBeijingP. R. China
| | - Lijuan Huang
- Department of OphthalmologyBeijing Children's HospitalCapital Medical University, National Center for Children's HealthBeijingP. R. China
- Department of OphthalmologySecond Affiliated Hospital of Fujian Medical UniversityQuanzhouP. R. China
| | - Di Hu
- Department of Radiology, MOE Key Laboratory of Major Diseases in ChildrenBeijing Children's Hospital, Capital Medical University, National Center for Children's HealthBeijingP. R. China
| | - Yanqiu Lv
- Department of Radiology, MOE Key Laboratory of Major Diseases in ChildrenBeijing Children's Hospital, Capital Medical University, National Center for Children's HealthBeijingP. R. China
| | - Huiying Kang
- Department of Radiology, MOE Key Laboratory of Major Diseases in ChildrenBeijing Children's Hospital, Capital Medical University, National Center for Children's HealthBeijingP. R. China
| | - Ningdong Li
- Department of OphthalmologyBeijing Children's HospitalCapital Medical University, National Center for Children's HealthBeijingP. R. China
- Key laboratory of Major Diseases in ChildrenMinistry of EducationBeijingP. R. China
| | - Yun Peng
- Department of Radiology, MOE Key Laboratory of Major Diseases in ChildrenBeijing Children's Hospital, Capital Medical University, National Center for Children's HealthBeijingP. R. China
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Xi S, Zhou Y, Yao J, Ye X, Zhang P, Wen W, Zhao C. Cortical Deficits are Correlated with Impaired Stereopsis in Patients with Strabismus. Neurosci Bull 2022:10.1007/s12264-022-00987-7. [DOI: 10.1007/s12264-022-00987-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Accepted: 09/21/2022] [Indexed: 12/13/2022] Open
Abstract
AbstractIn this study, we explored the neural mechanism underlying impaired stereopsis and possible functional plasticity after strabismus surgery. We enrolled 18 stereo-deficient patients with intermittent exotropia before and after surgery, along with 18 healthy controls. Functional magnetic resonance imaging data were collected when participants viewed three-dimensional stimuli. Compared with controls, preoperative patients showed hypoactivation in higher-level dorsal (visual and parietal) areas and ventral visual areas. Pre- and postoperative activation did not significantly differ in patients overall; patients with improved stereopsis showed stronger postoperative activation than preoperative activation in the right V3A and left intraparietal sulcus. Worse stereopsis and fusional control were correlated with preoperative hypoactivation, suggesting that cortical deficits along the two streams might reflect impaired stereopsis in intermittent exotropia. The correlation between improved stereopsis and activation in the right V3A after surgery indicates that functional plasticity may underlie the improvement of stereopsis. Thus, additional postoperative strategies are needed to promote functional plasticity and enhance the recovery of stereopsis.
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Zeng Y, Shu Y, Liu X, Li P, Kong L, Li K, Xie W, Zeng L, Long T, Huang L, Li H, Peng D. Frequency-specific alterations in intrinsic low-frequency oscillations in newly diagnosed male patients with obstructive sleep apnea. Front Neurosci 2022; 16:987015. [PMID: 36248662 PMCID: PMC9561418 DOI: 10.3389/fnins.2022.987015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Accepted: 09/13/2022] [Indexed: 11/13/2022] Open
Abstract
Purpose Previous studies found abnormal low-frequency spontaneous brain activity related to cognitive impairment in patients with obstructive sleep apnea (OSA). However, it is unclear if low-frequency spontaneous brain activity is related to specific frequency bands in OSA patients. In this study, we used the amplitude of low-frequency fluctuation (ALFF) method in patients with OSA to explore characteristics of spontaneous brain activity in the classical (0.01–0.1 Hz) and five sub-frequency bands (slow-2 to slow-6) and analyzed the relationship between spontaneous brain activity and clinical evaluation was analyzed. Patients and methods Resting-state magnetic resonance imaging data and clinical assessments were collected from 52 newly-diagnosed OSA patients and 62 healthy controls (HCs). We calculated the individual group ALFF values in the classical and five different sub-frequency bands. A two-sample t-test compared ALFF differences, and one-way analysis of variance explored interactions in frequency bands between the two groups. Results ALFF values in the OSA group were lower than those in the HC group in the bilateral precuneus/posterior cingulate cortex, bilateral angular gyrus, left inferior parietal lobule, brainstem, and right fusiform gyrus. In contrast, ALFF values in the OSA group were higher than those in the HC group in the bilateral cerebellum posterior lobe, bilateral superior frontal gyrus, bilateral middle frontal gyrus, left inferior frontal gyrus, left inferior temporal gyrus, and left fusiform gyrus. Some ALFF values in altered brain regions were associated with body mass index, apnea-hypopnea index, neck circumference, snoring history, minimum SaO2, average SaO2, arousal index, oxygen reduction index, deep sleep period naming, abstraction, and delayed recall in specific frequency bands. Conclusion Our results indicated the existence of frequency-specific differences in spontaneous brain activity in OSA patients, which were related to cognitive and other clinical symptoms. This study identified frequency-band characteristics related to brain damage, expanded the cognitive neuroimaging mechanism, and provided additional OSA neuroimaging markers.
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Affiliation(s)
- Yaping Zeng
- Medical Imaging Center, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Yongqiang Shu
- Medical Imaging Center, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Xiang Liu
- Medical Imaging Center, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Panmei Li
- Medical Imaging Center, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Linghong Kong
- Medical Imaging Center, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Kunyao Li
- Medical Imaging Center, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Wei Xie
- Medical Imaging Center, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Li Zeng
- Medical Imaging Center, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Ting Long
- Medical Imaging Center, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Ling Huang
- Medical Imaging Center, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Haijun Li
- Medical Imaging Center, The First Affiliated Hospital of Nanchang University, Nanchang, China
- PET Center, The First Affiliated Hospital of Nanchang University, Nanchang, China
- *Correspondence: Haijun Li,
| | - Dechang Peng
- Medical Imaging Center, The First Affiliated Hospital of Nanchang University, Nanchang, China
- PET Center, The First Affiliated Hospital of Nanchang University, Nanchang, China
- Dechang Peng,
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Chen RB, Ye SY, Pei CG, Zhong YL. Altered Temporal Dynamics of the Amplitude of Low-Frequency Fluctuations in Comitant Exotropia Patients. Front Hum Neurosci 2022; 16:944100. [PMID: 35911599 PMCID: PMC9326226 DOI: 10.3389/fnhum.2022.944100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2022] [Accepted: 06/20/2022] [Indexed: 11/30/2022] Open
Abstract
Purpose Growing evidence reported that patients with comitant exotropia (CE) were accompanied by static cerebral neural activity changes. However, whether the dynamic time-varying of neural activity changes in patients with CE remains unknown. Methods A total of 36 patients with CE (25 men and 11 women) and 36 well-matched healthy controls are enrolled in the study. The dynamic amplitude of low-frequency fluctuation (dALFF) combined with the sliding window method was used to assess the dynamic neural activity changes in patients with CE. Results Compared with HCs, patients with CE had decreased dALFF values in the right superior parietal lobule (SPL) and right precuneus gyrus (PreCUN). Moreover, we found that the dALFF maps showed an accuracy of 48.61% and an area under the curve of.54 for distinguishing the patients with CE from HCs. Conclusion Our study demonstrated that patients with CE showed altered dynamic neural activity changes in the right SPL and right PreCUN, which might indicate the neuropathological mechanism of stereoscopic dysfunction in patients with CE.
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Affiliation(s)
- Ri-Bo Chen
- Department of Radiology, Jiangxi Provincial People's Hospital, The First Affiliated Hospital of Nanchang Medical College, Nanchang, China
| | - Shu-Yuan Ye
- Department of Ophthalmology, The First Affiliated of Nanchang University, Nanchang, China
| | - Chong-Gang Pei
- Department of Ophthalmology, The First Affiliated of Nanchang University, Nanchang, China
- Chong-Gang Pei
| | - Yu-Lin Zhong
- Department of Ophthalmology, Jiangxi Provincial People's Hospital, The First Affiliated Hospital of Nanchang Medical College, Nanchang, China
- *Correspondence: Yu-Lin Zhong
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Li Y, Shen L, Sun M. Electroencephalography Study of Frontal Lobe Evoked by Dynamic Random-Dot Stereogram. Invest Ophthalmol Vis Sci 2022; 63:7. [PMID: 35522304 PMCID: PMC9078048 DOI: 10.1167/iovs.63.5.7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022] Open
Abstract
Purpose The purpose of this study was to investigate the cortical electrical activity and electroencephalography (EEG) features of the frontal lobe evoked by dynamic random dot stereogram (DRDS) and to probe the functional connectivity (FC) between the frontal lobe and occipital lobe when processing 3D perception based on the binocular disparity. Methods The EEG experiment involved 14 healthy adults with normal stereopsis (<60″) and normal corrected visual acuity (20/20). The Neuroscan system and 32-channel EEG cap were used to record EEG signals based on the DRDS stimuli. The maximum energies of 3 frequency bands (theta-/alpha- /beta-wave) from 13 interesting channels (FP1, FP2, F7, F3, FZ, F4, F8, FC3, FCZ, FC4, O1, OZ, and O2) located in the frontal and occipital lobes were calculated and analyzed. The FC between any two electrodes from the frontal and occipital lobes was calculated based on the Phase lag index (PLI). Results The maximum powers of theta- and alpha-waves in most channels of the frontal and occipital lobes were significantly increased (P < 0.05) when the depth perception was evoked by DRDS above the threshold, compared with that without stereo vision. The changes in the maximum powers of both theta- and alpha-waves were significantly different among the 13 electrodes (P = 0.0004 and 0.0015, respectively). Tukey's multiple comparisons showed that the changes in the maximum powers of theta-wave were significantly different in F8 vs. O1, F8 vs. OZ, and F4 vs. O1 (P = 0.0186, 0.0444, and 0.0412, respectively). Moreover, the changes in the maximum powers of alpha-waves were significantly different in FP1 vs. O1 (P = 0.0182). The FCs of theta-waves between the frontal channels and the occipital channels were significantly enhanced when processing the depth perception, compared with those without stereopsis. There was no significant change in the FCs of the alpha-waves when having 3D perception except for FC between F8 and O1 and FC between F8 and OZ. Conclusions The cortical electrical activity in the frontal lobe and the functional connectivity between the frontal lobe and the occipital lobe increase when participating in the processing binocular disparity and obtaining 3D perception. Theta-waves in the frontal lobe may be crucial in the stereo vision.
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Affiliation(s)
- Yueping Li
- Pediatric Ophthalmology and Strabismus Department, Tianjin Eye Hospital, Clinical College of Ophthalmology of Tianjin Medical University, Tianjin Key Laboratory of Ophthalmology and Vision Science, Tianjin, China
| | - Lili Shen
- School of Electronic Information Engineering, Tianjin University, Tianjin, China
| | - Mingyang Sun
- School of Electronic Information Engineering, Tianjin University, Tianjin, China
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Chen RB, Zhong YL, Huang X. The predictive value of local to remote functional connectivity changes in comitant exotropia patients. Neuroreport 2022; 33:259-265. [PMID: 35383657 DOI: 10.1097/wnr.0000000000001777] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
BACKGROUND Comitant exotropia (CE) is a common eye disease with abnormal eye movement, whereas altered synchronous neural activity in CE patients is poorly understood. The purpose of our study was to investigate local to remote functional connectivity of blood oxygen level-dependent (BOLD) signals changes in CE patients. MATERIAL AND METHODS Thirty-four patients and thirty-four healthy controls (HCs) underwent resting-state MRI scans. The ReHo and FC method was applied to investigate the local to remote functional connectivity changes in CE patients. RESULTS Compared to the HC group, CE patients showed significant increased ReHo values in the left cerebellar_crus2 and left middle frontal gyrus. Meanwhile, CE patients showed significant decreased ReHo values in the right middle temporal gyrus, left postcentral gyrus and right angular. Moreover, CE patients showed an increased FC between the cerebellar network, sensorimotor network (SMN) and default-mode network (DMN). The support vector machine (SVM) classification was up to a total accuracy of 94.12%. The AUC of the classification model was 0.99 on the basis of ReHo map. CONCLUSION Our result highlights that CE patients had abnormal local to remote functional connectivity in the cerebellar network, SMN, DMN, which might indicate the neural mechanism of eye movements and stereo vision dysfunction in CE patients. Moreover, the SVM algorithm reveals ReHo maps as a potential biomarker for predicting clinical outcomes in CE patients.
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Affiliation(s)
| | - Yu-Lin Zhong
- Department of Ophthalmology, Jiangxi Provincial People's Hospital, Nanchang, Jiangxi, China
| | - Xin Huang
- Department of Ophthalmology, Jiangxi Provincial People's Hospital, Nanchang, Jiangxi, China
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Shi WQ, Zhang MX, Tang LY, Ye L, Zhang YQ, Lin Q, Li B, Shao Y, Yu Y. Altered spontaneous brain activity patterns in patients with diabetic retinopathy using amplitude of low-frequency fluctuation. World J Diabetes 2022; 13:97-109. [PMID: 35211247 PMCID: PMC8855138 DOI: 10.4239/wjd.v13.i2.97] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/01/2021] [Revised: 08/10/2021] [Accepted: 01/06/2022] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Diabetes mellitus is a metabolic disorder characterized by prolonged elevation of blood glucose due to various causes. Currently, the relationship between diabetic retinopathy (DR) and altered connectivity of brain function is unclear.
AIM To investigate the relationship between this brain activity and clinical manifestations and behaviors of DR patients by using the amplitude of low-frequency fluctuation (ALFF) technique.
METHODS Twenty-four DR patients and 24 healthy controls (HCs) matched for age and gender were enrolled. We measured and recorded average ALFF values of DR patients and HCs and then classified them using receiver operating characteristic (ROC) curves.
RESULTS ALFF values of both left and right posterior cerebellar lobe and right anterior cingulate gyrus were remarkably higher in the DR patients than in the HCs; however, DR patients had lower values in the bilateral calcarine area. ROC curve analysis of different brain regions demonstrated high accuracy in the area under the curve analysis. There was no significant relationship between mean ALFF values for different regions and clinical presentations in DR patients. Neuronal synchronization abnormalities in some brain regions of DR patients were associated with cognitive and visual disorders.
CONCLUSION Abnormal spontaneous brain activity was observed in many areas of DR patients’ brains, which may suggest a possible link between clinical manifestations and behaviors in DR patients.
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Affiliation(s)
- Wen-Qing Shi
- Department of Endocrinology and Ophthalmology, The First Affiliated Hospital of Nanchang University, Jiangxi clinical research center for endocrine and metabolic disease, Nanchang 330006, Jiangxi Province, China
| | - Mou-Xin Zhang
- Xiamen Eye Center of Xiamen University, School of Medicine, Xiamen University, Xiamen 361001, Fujian Province, China
| | - Li-Ying Tang
- Department of Ophthalmology, Zhongshan Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen 361001, Fujian Province, China
| | - Lei Ye
- Department of Endocrinology and Ophthalmology, The First Affiliated Hospital of Nanchang University, Jiangxi clinical research center for endocrine and metabolic disease, Nanchang 330006, Jiangxi Province, China
| | - Yu-Qing Zhang
- Department of Endocrinology and Ophthalmology, The First Affiliated Hospital of Nanchang University, Jiangxi clinical research center for endocrine and metabolic disease, Nanchang 330006, Jiangxi Province, China
| | - Qi Lin
- Department of Endocrinology and Ophthalmology, The First Affiliated Hospital of Nanchang University, Jiangxi clinical research center for endocrine and metabolic disease, Nanchang 330006, Jiangxi Province, China
| | - Biao Li
- Department of Endocrinology and Ophthalmology, The First Affiliated Hospital of Nanchang University, Jiangxi clinical research center for endocrine and metabolic disease, Nanchang 330006, Jiangxi Province, China
| | - Yi Shao
- Department of Endocrinology and Ophthalmology, The First Affiliated Hospital of Nanchang University, Jiangxi clinical research center for endocrine and metabolic disease, Nanchang 330006, Jiangxi Province, China
| | - Yao Yu
- Department of Endocrinology and Ophthalmology, The First Affiliated Hospital of Nanchang University, Jiangxi clinical research center for endocrine and metabolic disease, Nanchang 330006, Jiangxi Province, China
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