Functional neural networks stratify Parkinson's disease patients across the spectrum of cognitive impairment.

INTRODUCTION: Cognitive impairment (CI) is a significant non-motor symptoms in Parkinson's disease (PD) that often precedes the emergence of motor symptoms by several years. Patients with PD hypothetically progress from stages without CI (PD-normal cognition [NC]) to stages with Mild CI (PD-MCI) and PD dementia (PDD). CI symptoms in PD are linked to different brain regions and neural pathways, in addition to being the result of dysfunctional subcortical regions. However, it is still unknown how functional dysregulation correlates to progression during the CI. Neuroimaging techniques hold promise in discriminating CI stages of PD and further contribute to the biomarker formation of CI in PD. In this study, we explore disparities in the clinical assessments and resting-state functional connectivity (FC) among three CI stages of PD. METHODS: We enrolled 88 patients with PD and 26 healthy controls (HC) for a cross sectional clinical study and performed intra- and inter-network FC analysis in conjunction with comprehensive clinical cognitive assessment. RESULTS: Our findings underscore the significance of several neural networks, namely, the default mode network (DMN), frontoparietal network (FPN), dorsal attention network, and visual network (VN) and their inter-intra-network FC in differentiating between PD-MCI and PDD. Additionally, our results showed the importance of sensory motor network, VN, DMN, and salience network (SN) in the discriminating PD-NC from PDD. Finally, in comparison to HC, we found DMN, FPN, VN, and SN as pivotal networks for further differential diagnosis of CI stages of PD. CONCLUSION: We propose that resting-state networks (RSN) can be a discriminating factor in distinguishing the CI stages of PD and progressing from PD-NC to MCI or PDD. The integration of clinical and neuroimaging data may enhance the early detection of PD in clinical settings and potentially prevent the disease from advancing to more severe stages.

Altered Large-Scale Resting-State Functional Network Connectivity in Convergence Insufficiency Young Adults Compared With Binocularly Normal Controls.

Purpose: To investigate the underlying resting-state functional connectivity (RSFC) of symptomatic convergence insufficiency (CI) compared with binocularly normal controls (BNC) using functional magnetic resonance imaging (fMRI) under The Convergence Insufficiency Neuro­mechanism Adult Population Study (NCT03593031). Methods: A total of 101 participants were eligible for this study. After removing datasets with motion artifacts, 49 CI and 47 BNC resting-state functional magnetic resonance imaging datasets were analyzed. CI was diagnosed with the following signs: (1) receded near point of convergence of 6 cm or greater, (2) decreased positive fusional vergence of less than 15∆ or failing Sheard's criteria of twice the near phoria, (3) near phoria of at least 4∆ more exophoric compared with the distance phoria, and (4) symptoms using the Convergence Insufficiency Symptom Survey (score of ≥21). RSFC was assessed using a group-level independent components analysis and dual regression. A behavioral correlation analysis using linear regression method was performed between clinical measures and RSFC using the significant difference between the CI and BNC. Results: On average, a decreased RSFC was observed within the frontoparietal network, default mode network and visual network in patients with CI, compared with the participants with BNC (P < 0.05, corrected for multiple comparisons). The default mode network RSFC strength was significantly correlated with the PFV, near point of convergence, and difference between the horizontal phoria at near compared with far (P < 0.05). Conclusions: Results support altered RSFC in patients with CI compared with participants with BNC and suggest that these differences in underlying neurophysiology may in part be in connection with the differences in optometric visual function used to diagnose CI.

Clinical evaluation and resting state fMRI analysis of virtual reality based training in Parkinson's disease through a randomized controlled trial.

There are few studies investigating the short-term effects of Virtual Reality based Exergaming (EG) on motor and cognition simultaneously and pursue the brain functional activity changes after these interventions in patients with Parkinson's Disease (PD). The purpose of this study was to investigate the synergistic therapeutic effects of Virtual Reality based EG on motor and cognitive symptoms in PD and its possible effects on neuroplasticity. Eligible patients with the diagnosis of PD were randomly assigned to one of the two study groups: (1) an experimental EG group, (2) an active control Exercise Therapy (ET) group. All patients participated in a 4-week exercise program consisting of 12 treatment sessions. Every session lasted 60 min. Participants underwent a motor evaluation, extensive neuropsychological assessment battery and rs-fMRI before and after the interventions. Thirty patients fulfilled the inclusion criteria and were randomly assigned to the EG and ET groups. After the dropouts, 23 patients completed the assessments and interventions (11 in EG, 13 in ET). Within group analysis showed significant improvements in both groups. Between group comparisons considering the interaction of group × time effect, showed superiority of EG in terms of general cognition, delayed visual recall memory and Boston Naming Test. These results were consistent in the within-group and between-group analysis. Finally, rs-fMRI analysis showed increased activity in the precuneus region in the time × group interaction in the favor of EG group. EG can be an effective alternative in terms of motor and cognitive outcomes in patients with PD. Compared to ET, EG may affect brain functional connectivity and can have beneficial effects on patients' cognitive functions and motor symptoms. Whenever possible, using EG and ET in combination, may have the better effects on patients daily living and patients can benefit from the advantages of both interventions.

Supervised exercises versus telerehabilitation. Benefits for persons with multiple sclerosis.

OBJECTIVES: The purpose of this study was to investigate the effectiveness of structured telerehabilitation on fatigue, health status, quality of life (QoL), and activities of daily living (ADL) and compare the possible effects with structured supervised exercise programs in patients with Multiple Sclerosis. MATERIALS AND METHODS: This study was a randomized, single-blind trial. Thirty patients with relapsing-remitting Multiple Sclerosis were included in the study and randomly divided into two groups; structured supervised exercise group (Group 1) and telerehabilitation group (Group 2). Group 1 (n = 15) completed a 12 week structured supervised exercise program. Group 2 (n = 15) completed a 12 week structured home-based exercise program. Patients were evaluated with functional independence measure (FIM), first section of Nottingham Health Profile (NHP-I), fatigue severity scale (FSS), and quality of life scale (QoLS) before and after the intervention. RESULTS: Significant differences were found in all parameters in both groups after the treatment (p < .05). No significant difference was found between groups regarding FIM-total, FIM-motor, FIM-cognitive, NHP sub-parameters, and QoLS (p > .05). Between-group differences revealed a significant difference in FSS and NHP total in favor of Group 1 (p < .05). CONCLUSION: A structured home-based exercise program can be an alternative to supervised exercises with no side effects in patients with multiple sclerosis. Home-based rehabilitation exercises that are checked and controlled through telerehabilitation can help patients improve their health-related QoL and ADL. However, supervised exercises can be more beneficial regarding the fatigue and health profile compared to the home-based exercises.

Cross-cultural adaptation, validity and reliability of Turkish version of Oxford Ankle Foot Questionnaire for children with congenital talipes equinovarus.

BACKGROUND: The purpose of the study was to evaluate the reliability and validity of the Turkish version of the Oxford Ankle Foot Questionnaire (OxAFQ) to provide cultural adaptation. METHODS: This study involved translation, back translation, and cross-cultural adaptation. Forty-nine patients with congenital talipes equinovarus were evaluated using the Turkish version of OxAFQ. Turkish version of the Childhood Health Assessment Questionnaire (CHAQ) was used as a gold standard to validate the Turkish version of the OxAFQ. The validation was assessed with Spearman correlation analysis by using CHAQ. The reliability of the questionnaire was assessed with Cronbach alpha (internal consistency) and exploratory factor analysis. RESULTS: High validity was found between OxAFQ and CHAQ (r = -0.422-0.292) (p < 0.01). Reliability analysis showed that OxAFQ had a high level of Cronbach alpha (α = 0.88-0.96) and internal consistency (ICC = 0.90-0.96). CONCLUSION: The Turkish version of OxAFQ is a valid, reliable and useful quality of life questionnaire in patients with congenital talipes equinovarus and it is proper for use by health professionals and researchers.

Virtual Reality Training Helpful in Motor and Cognition in Corticobasal Syndrome: A Case Report PET Study.

Corticobasal syndrome (CBS) is a rare progressive neurodegenerative disease characterized by a combination of asymmetric motor symptoms and non-motor symptoms. CBS is poorly responsive to levodopa. Non-pharmacological strategies have been found to be useful as components of a multidisciplinary therapeutic approach for patients with CBS. The purpose of this study was to investigate the effects of virtual reality training in addressing symptoms of CBS. A 64-year-old man was clinically diagnosed as CBS one year after the onset of complaints. Positron emission tomography (PET) scan showed asymmetrical hypometabolism in the right thalamus and basal ganglia. The patient was evaluated for balance, gait, mobility, and cognition 1 week before, 1 week after, and 1 year after 6 weeks of training, 3 times weekly (18 sessions in total). All clinical outcomes and PET result had improved after the intervention; cognition and balance were maintained after 1 year. Additionally, the asymmetric hypometabolism, which had been detectable on the PET scan, became normal, and a relative improvement was noted in the visual evaluation of cortical involvement. Virtual reality may address different aspects of motor and cognition and possibly brain metabolic changes that can affect the course of the disease in patients with CBS.

Disabled children's functionality and maternal quality of life and psychological status.

BACKGROUND: Physiotherapy is being provided for different disabled groups in pediatric rehabilitation centers. The quality of life (QOL) and psychological status of the mothers of these children is affecting their compliance in the rehabilitation period. The aim of this study was therefore to assess the relationship between disability level of individuals receiving rehabilitation and maternal QOL, psychological status and influencing factors. METHODS: One hundred and twenty-six disabled children and their mothers were included in this cross-sectional study. Demographic information was noted. Child motor level was assessed using the Gross Motor Function Classification System and the level of independency in activities of daily living (ADL) was assessed with the Katz ADL scale. Maternal QOL was assessed with the 36-item Short Form (SF-36), and psychological status with the Beck Depression Inventory (BDI). SPSS 18.0 was used to analyze data. RESULTS: Mean maternal age was 36.46 ± 7.2 years. Of the children, 67.5% had physical problems, 16.7% had mental problems, 7.9% had autism, 4.8% had hyperactivity, and 3.2% had hearing and speaking problems. Mild depression was detected in mothers (mean BDI score, 11.27 ± 8.1). There was no correlation between child disability level and maternal QOL and depression (P > 0.05). Maternal BDI score was negatively correlated with all SF-36 subscale scores (P < 0.001 for all parameters). CONCLUSION: The SF-36 subscale scores of mothers of disabled children were decreased compared with Turkish community norms. Psychological support of mothers of children in the rehabilitation period may positively affect this period.