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NCT07545473
Hyperspectral retinal imaging is a non-invasive imaging modality in which a series of images of the retina are captured using light of different wavelengths. The resulting "hypercube" of data provides a wealth of information about the retinal structure. Our group has developed evidence supporting a role for this technology in the detection of retinal amyloid beta in Alzheimer's disease. We are undertaking further studies to establish the role of this method in the assessment of people with dementia, or those at risk of Alzheimer's disease. In addition, we wish to test whether the approach may have value in other forms of dementia or neurodegenerative disease such as Parkinson's disease, Lewy-Body dementia or vascular dementia.
NCT07449117
The purpose of this study is to investigate the immediate effects of non-invasive temporal interference stimulation (TIS) targeting the striatum on sentence processing and brain connectivity in patients with neurodegenerative diseases.
NCT05847985
Lewy body diseases (LBDs) represents a group of neurodegenerative disorders characterized by the abnormal accumulation of aggregates of α-synuclein protein leading to the formation of Lewy bodies (LB) and Lewy neurites resulting in cell death. LBDs consists of two major clinical entities - Parkinson's disease (PD) and dementia with LB (DLB). Vast majority of patients with LBDs either already have mild cognitive impairment (MCI) at the time of the diagnosis or will develop it during the course of the disease. Language dysfunctions in LBDs patients with MCI are often unrecognized, which are difficult to treat, but even subtle changes might lead to impairment of social and occupational functioning with profound effect on their quality of lives. Current pharmacological or surgical strategies are effective for tackling the motor issues of LBDs with very limited effects on other symptoms such as language dysfunctions. Therefore, non-pharmacological approaches are gaining more attention. One of these non-pharmacological strategies is the use of noninvasive brain stimulation (NIBS) techniques that are able to modulate the brain functions with the effects on human nervous system plasticity. In this proposed project the investigators aim to first describe specific alterations in the language domain in LBDs patients with MCI as compared to healthy controls (HC) and identify the neural underpinnings of these changes using novel combination of advanced multimodal imaging techniques and various analytical methods. Secondly, the investigators aim to use NIBS as a supervised and individualized home-based therapeutical approach to tackle the language dysfunctions.
NCT06057909
The purpose of this research study is to investigate how the brain, memory, thinking, and motor behavior change both in individuals with movement and/or cognitive disorders, as well as healthy individuals. Researchers will look at measurements of memory, thinking, brain wave and muscle activity, daily functioning, and brain scans to learn more about brain disorders such as Alzheimer disease and Lewy body disease.
NCT04715399
The aim of this study is to create a repository of both cross-sectional and longitudinal data, including cognitive, linguistic, imaging and biofluid biological specimens, for neurodegenerative disease research and treatment.
NCT04794634
Alzheimer disease is hard, long and expensive to diagnose. In order to help the clinician, a new biomarker in Alzheimer disease seems to be very useful. The retina, as a window of the brain, could offer a new way to diagnose this common disease. Indeed, a retinal atrophy could especially appear in Alzheimer disease. Besides, many aspects about retinal alteration, visual function and their link with the disease deserve to be more explored. So as to fill these gaps, a new study about retinal specificity in Alzheimer disease appears to be relevant.
NCT06785948
The goal of this pilot prospective study is to evaluate the effect of tDCS on psychotic-like symptoms in patients with Lewy Body Dementia (LBD). The main questions it aims to answer are: * What is the effect of tDCS on neuropsychiatric symptoms, especially psychotic-like symptoms? * What is the impact of tDCS on caregiver burden? Researchers will compare active tDCS (2mA stimulation, anode on the left dorsolateral prefrontal cortex, cathode on the right fronto-orbital) to Sham tDCS (placebo stimulation, no intensity applied) to see if there is an effect on reducing psychotic-like symptoms and on caregiver burden. Participants will: * Undergo a stimulation phase consisting of 10 tDCS sessions of 20 minutes each, spread over 2 consecutive weeks (5 days with stimulation, 2 days without stimulation, 5 days with stimulation). * perform assessments at T0 (inclusion), T1 (at the end of the stimulation phase), and T2 (follow-up at 8 weeks post stimulation).
NCT03174938
The Swedish BioFINDER 2 study is a new study that will launch in 2017 and extends the previous cohorts of BioFINDER 1 study (www.biofinder.se). BioFINDER 1 is used e.g. to characterize the role of beta-amyloid pathology in early diagnosis of Alzheimer's disease (AD) using amyloid-PET (18F-Flutemetamol) and Aβ analysis in cerebrospinal fluid samples. The BioFINDER 1 study has resulted in more than 40 publications during the last three years, many in high impact journals, and some the of the results have already had important implications for the diagnostic work-up patients with AD in the clinical routine practice. The original BioFINDER 1 cohort started to include participants in 2008. Since then there has been a rapid development of biochemical and neuroimaging technologies which enable novel ways to the study biological processes involved in Alzheimer's disease in living people. There has also been a growing interest in the earliest stages of AD and other neurodegenerative diseases. With the advent of new tau-PET tracers there is now an opportunity to elucidate the role of tau pathology in the pathogenesis of AD and other tauopathies. The Swedish BioFINDER 2 study has been designed to complement the BioFINDER 1 study and to e.g. address issues regarding the role of tau pathology in different dementias and in preclinical stages of different dementia diseases. Further, the clinical assessments and MRI methods have been further optimized compared to BioFINDER 1. Detailed assessments of motor aspects and dual task performance, which is part of a sub-study named Motor-ACT: "Motor aspects and activities in relation to cognitive decline and brain pathologies, has been added to further optimize assessment of motor function.
NCT04436341
In the current study, the investigators will examine the extent of subclinical epileptic activity in patients with Alzheimer's disease and patients with Lewy body dementia as compared to healthy elderly controls. The participants will wear a new device called "ear-EEG", which makes it possible to record EEG for longer periods of time while at home. Furthermore, the investigators want to investigate whether there is an association between subclinical epileptic activity and the cerebral blood flow as measured with functional MRI.
NCT06745011
Description of a method to detect Parkinson's disease or Parkinson's-like disease at an early stage (Prodromal Parkinson's Disease) where damage is still confined to the peripheral nervous system damage. Simultaneous collection of biological material to establish a biobank for use as prognostic biomarkers for the development of Parkinson's disease and other neurodegenerative diseases in which pathological alpha-synuclein deposits accumulate.
NCT05622734
The goal of this clinical trial is to evaluate the feasibility, acceptability, and initial efficacy of the VOCALE LBD+ intervention in caregivers of persons living with Lewy Body Dementia. The main question\[s\] it aims to answer are: * What is the extent to which the VOCALE LBD+ intervention affects caregiving mastery scores at the end of the eight-week intervention * What is the extent to which a change in caregiving mastery scores is retained four weeks after the end of the VOCALE LBD+ intervention Participants will be asked to participate in a fully online asynchronous VOCALE LBD+ intervention that involves a moderated web-based discussion platform, peer-to-peer support, didactic training, and problem-solving skill enactment.
NCT03724136
The purpose of the study is to evaluate the use of autologous Bone Marrow Derived Stem Cells (BMSC) as a means to improve cognitive impairment as occurs in Alzheimer's Disease and other dementias and to improve behavior and socialization issues which occur in adult Autism Spectrum Disorder. The use of Near Infrared Light, in conjunction with the use of BMSC, will also be assessed.
NCT05188105
Brain oscillations are ubiquitous in the human brain and have been implicated in cognitive and behavioral states defined in precisely tuned neural networks. In neurodegenerative disorders, neurodegeneration is accompanied by changes in oscillatory activity leading to the emerging concept of neurological and psychiatric disorders as "oscillopathies". Dementia with Lewy bodies (DLB), which is the second most frequent cause of neurodegenerative dementia, is characterized by an important alteration of brain oscillations. The restoration of oscillations by neuronal entrainment in animal models of neurodegenerative disease has shown a significant reduction in the neuropathological load of toxic proteins, with a consequent significant increase in cognitive performance. Transcranial alternating current brain stimulation (tACS), is a neurophysiological method of non-invasive modulation of the excitability of the central nervous system that is having an increasingly numerous spectrum of potential therapeutic applications. Recent studies have demonstrated the effectiveness of this method in modulating the natural frequencies of cerebral oscillation, underlying multiple cognitive processes such as verbal memory, perception and working memory. On the basis of these premises, the treatment with alpha tACS is proposed in patients with DLB. In this randomized, double-blind, sham-controlled, cross-over study, the investigators will evaluate whether a single stimulation with alpha tACS on the occipital lobes can improve symptoms in patients with DLB.
NCT05508646
Twelve participants and their care partners will be randomized for the intervention. The music therapy intervention takes place once a week for 6 weeks via telemedicine, with the first session reserved for music therapy intake/assessment. There are 5 additional visits, once per week. The format of the sessions may include: a greeting song to orient the participant to the start of the session; singing of 1-3 preferred/chosen songs to address cognition and communication; two movement songs with instrument playing interventions to stimulate cognition and movement; songwriting for self-expression, cognitive, and emotional support; relaxation/mindfulness; a closing song to help the participant transition at the completion of the session, The music therapist also provides training to caregivers in techniques to utilize music for behavioral support. Twelve participants and their care partners will be randomized to receive a personalized music CD that they keep and can listen to as they wish.
NCT06221202
This study is designed to evaluate the impact on the quality of life and wellbeing of a person-centered online dance program on people living with dementia or MCI and care partners. The duration of the study will be 1 year. Each participant in the study will be followed for approximately 4 months. The study includes joining a weekly 1-hour dance program online on Zoom for 12 weeks. Prior and after the dance program, participants will meet with the research coordinator to answer some questionnaires about wellbeing and reflections on their experience in the program. After the completion of the dance program, participants will be invited to join a focus group to reflect of the impact of the program with fellow participants. The study will enroll up to 72 participants. This includes 36 dyads of persons living with dementia or MCI and their care partners. The study will enroll community-dwelling people living with a diagnosis of mild cognitive impairment or mild to moderate-stage dementia and care partners living in the United States.
NCT05518409
The subject uses cytof to analyze PBMC of sporadic AD and DLB, which is used to reveal the differences in immune characteristics of the two diseases at the single-cell level, build immune models for specific diseases, and define these two neurodegenerative diseases with high precision from the level of molecular immunity. To provide basis for further study of the immunohistochemical differences between the two diseases, and provide objective support for clinical diagnosis and differential diagnosis.
NCT04649164
The investigators propose to adapt, improve, and implement a peer mentor support and caregiver education (PERSEVERE) program to improve LBD-specific caregiving mastery. Lewy body dementia (LBD) is the second most common dementia, comprising Parkinson's Disease (PD) dementia and Dementia with Lewy Bodies. LBD causes deterioration in multiple cognitive, motor, and neuropsychiatric domains, leading to heavy reliance on family caregivers. Patients with LBD are at a far greater risk of hospitalizations for falls, neuro-psychiatric symptoms, and infections, which are often preventable or treatable at home if recognized. Studies cite a crucial need for education and support of LBD caregivers, who face high rates of caregiver strain and adverse outcomes. Evidence from other chronic conditions supports peer mentoring as a potentially effective intervention to provide education and social support. PERSEVERE builds on our team's ongoing work of creating and testing a peer mentoring program for homebound PD patients' caregivers that has shown promising feasibility and acceptability. In the proposed project, the investigators will convene focus groups of former mentors and mentees, along with current caregivers, to provide formative information to shape the revised PERSEVERE curriculum that will include in-person mentor training and a comprehensive mentoring handbook. The curriculum will focus on key areas of LBD caregiving mastery, including: fall prevention, infections, neuropsychiatric symptoms (particularly hallucinations, delusions, anxiety, and depression), and advance directives. The investigators will enroll and train a new cohort of 36 LBD caregiver peer mentors who will be matched with 30 current LBD caregivers. Each pair will be instructed to speak on a weekly basis, using the 16-week structured curriculum as a framework. The study team will support the mentors with monthly conference calls and day-to-day availability for concerns. The investigators will assess the feasibility and fidelity of the intervention via online study diaries tracking the frequency, duration, and content of calls. During mentor training, the investigators will assess the change in mentors' caregiver mastery and LBD knowledge pre- and post-training. During the PERSEVERE intervention, the investigators will determine the change in mentees' caregiver mastery, LBD knowledge, and loneliness.
NCT05004558
The investigators aim to study the effects of a 24-week remote-based resistance exercise training program on cardiovascular disease risk factors, cognitive function, and quality of life in older adults living with mild cognitive impairment or Alzheimer's Disease and/or a related dementia. Data for this study will be collected at the beginning, middle, and end of the resistance training program. Participants of this study will receive a baseline health-fitness assessment at the beginning of the study. Measurements of resting blood pressure, fasting blood glucose and lipids, waist and hip circumferences, height and weight, cognitive function and quality of life will be collected at the health-fitness assessment. Participants will then receive supervised remote-based resistance exercise training with Therabands, 3 days per week for 12 weeks before receiving a second 12-week health-fitness assessment in the middle of the intervention. Participants will then receive 12 additional weeks of supervised remote-based resistance exercise training with Therabands, 3 days per week for 12 weeks before receiving a third 24-week health fitness assessment at the end of the study.
NCT04963855
Descriptive safety and pharmacokinetics of GT300, exploratory biomarker effects for the evaluation of the effect of GT300 on the autophagy-lysosomal pathway (ALP), food effect on PK and fasting effect on biomarkers.
NCT03472482
In this observational study, the investigators aim to evaluate whether changes in the retinal and choroidal circulation, as assessed by Optical Coherence Tomography (OCT) and the quantification of retinal amyloid deposits using auto-fluorescence and hyperspectral retinal imaging, are correlated with the degree and subtype of dementia and with the presence or absence of a positive amyloid scan. For this purpose, patients with established Alzheimer's Disease (AD) and Lewy Body Dementia (LBD), as well as amyloid positive and amyloid negative Mild Cognitive Impairment (MCI) and aged matched cognitively intact patients will be included in this cross-sectional study.