View clinical trials related to Aphasia, Primary Progressive.
Filter by:The purpose of this study is to identify and distinguish two different types of Progressive Apraxia of Speech through clinical imaging and testing.
The goal of this study is to demonstrate the feasibility of mapping tau pathology in subjects with Primary Progressive Aphasia, using PET protocol with F-AV-1451 (trade name AV-1451) and to systematically document the extent and location of tau pathology in PPA patients in vivo using the same techniques.
Apathy can be defined as a quantitative reduction of voluntary or goal-directed behavior. So, the investigators propose a behavioral approach for assessing apathy, to obtain a quantifiable and objective signature of reduced goal-directed behavior by directly observing a patient in a real-life situation. ECOCAPTURE consists of a multi-step scenario in a functional exploration platform equipped with data acquisition system based on video and sensors that track a participant's behavior. The primary objective of this trial is to create a diagnostic tool for apathy, based on the video and sensors metrics. A secondary objective of this trial is to validate a new experimental task (ICM_APATHY_TASKS) to test independently three main presumed mechanisms of apathy (motivation, cognitive inertia and coupling between motivation and action). Another secondary objective aims to specify the pathophysiological mechanisms of apathy, corresponding to cognitive and behavioral processes, neural bases and neurohormonal mechanisms. The definition of pathophysiological mechanisms will allow the classification of apathetic patients (or several forms of apathy) and indicate which mechanism (s) best explains the apathy in a given patient.
This study aims to develop and evaluate biomarkers using non-invasive optical coherence tomography (OCT) and OCT angiography (OCTA) as well as ultra-widefield (UWF) fundus photography to assess the structure and function of the retinal and choroidal microvasculature and structure in persons with mild cognitive impairment (MCI) and Alzheimer's Disease (AD), Parkinson's Disease (PD), or other neurodegenerative disease, diseases as outlined.
Background: Neurodegenerative disorders can lead to problems in movement or memory. Some can cause abnormal proteins to build up in brain cells. Researchers want to understand whether these diseases have related causes or risk factors. Objective: To test people with movement or thinking and memory problems to see if they are eligible for research studies. Eligibility: People ages 18 and older with a neurodegenerative disorder associated with accumulation of TDP-43 or Tau proteins Design: Participants will have a screening visit. This may take place over 2-3 days. Tests include: Medical history Physical exam Questions about behavior and mood Tests of memory, attention, concentration, and thinking Movement measurement. The speed at which participants can stand up from a chair, tap their finger and foot, and walk a short distance will be measured. Some movements will be videotaped. They will be videotaped while they speak and read a paragraph. Blood tests. This might include genetic testing. Lung and breathing tests MRI. They will lie on a table that slides into a cylinder that takes pictures of the body. Some participants will get a dye through IV. Electromyography. A thin needle will be inserted into the muscles to measure electrical signals. Nerve tests. Small electrodes on the skin record muscle and nerve activity. A small piece of skin may be removed. A skin or blood sample may be taken to create stem cells. Optional lumbar puncture. A needle will be inserted into the space between the bones of the back to collect fluid. If participants are not eligible for current studies, they may be contacted in the future.
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.
This study attempts to identify two types of AD by using clinical and cognitive tasks and brain imaging. The subtypes of AD are separated into a "typical" group (memory loss) and a "variant" group (language, visuospatial, and other cognitive difficulties). Performance on the clinical tasks and brain imaging will be compared among the young-onset Alzheimer's disease group, a late-onset Alzheimer's disease group, and a control group.
To establish diagnostic tools to make an accurate clinical and pathological diagnosis of patients with clinical FTLD syndromes
Neuroinflammation is increasingly implicated as a potential critical pathogenic mechanism in a variety of neurologic and psychiatric disorders. This study will use hybrid PET/MRI imaging to evaluate neuroinflammation and its relationship to cerebral perfusion in frontotemporal dementia (FTD). Patients with FTD will be recruited from the Cognitive Neurology and Aging Brain clinics at Parkwood Institute and will undergo neurocognitive assessment and MRI/PET using the PET ligand FEPPA which binds to activated microglia, a marker of neuroinflammation. Correlations will be conducted to determine whether abnormal neuroinflammation is present in Frontotemporal dementia and whether differential patterns of neuroinflammation are present in different FTD clinical and molecular subtypes, and to determine the relationship between neuroinflammation, cerebral perfusion using arterial spin labeling MRI imaging techniques, and indices of brain structure including volumetric and white matter analysis.
The purpose of this study is to evaluate the effect of 10 sessions of anodal transcranial Direct Current Stimulation (tDCS - 1 mA) applied to left Cortex DorsoLateral PreFrontal (CDLPF) of Alzheimer's or Primary Progressive Aphasia (PPA) patients compared to the application of a placebo tDCS (sham procedure) on cognitive functions, which are evaluated at short term (1 week post-treatment) and mild term (3 weeks post-treatment). After unblinding, patients who received placebo treatment could be received active tDCS.