View clinical trials related to Dystonia.
Filter by:The intraoperative neuroelectrophysiological signals were collected from patients undergoing STN-DBS under general anesthesia in the Neurosurgery Department of Wuhan union Hospital, and their preoperative conditions and postoperative efficacy will be evaluated.
The term perceptual awareness refers to subjective experience... or the phenomenology associated with the processing of a sensory stimulus. The term metacognition refers to our ability of introspection, knowledge and control of our own cognitive processes. The objective of this research is to establish the contribution of the basal ganglia and thalamus to the perceptual awareness and meta-cognition, using deep brain stimulation coupled with electroencephalography.
This study is designed to demonstrate an in-house developed re-attachable stereotactic system that can markedly reduce the overall deep brain stimulation (DBS) procedure time to greatly facilitate subject access to neurosurgical restorative therapies. Subjects will consist exclusively of individuals who have been approved to undergo deep brain stimulation surgery for the treatment of a neurological disorder at Mayo Clinic - Rochester MN. This study is a quantitative comparative, between-subject study enrolling approximately 10 subjects.
Dystonia is a devastating disorder defined by involuntary, sustained muscle contractions or abnormal postures that can affect any part of the body. Cervical dystonia (CD) is the most pervasive form of dystonia affecting 60-90,000 individuals in the United States alone and is characterized by involuntary twisting of the neck. The symptoms of CD are disabling, disfiguring, painful, and have a strongly negative impact on quality of life, including social withdrawal and depression. At present, there is no treatment that has been shown to have long term benefit in CD. Standard of care (SOC) is botulinum toxin, which temporarily paralyzes affected muscles, resulting in reduced muscle spasms. This treatment has many undesirable side effects, variable effectiveness, is expensive, and must be repeated every 3 months throughout the lifespan. Physical therapy based treatments aimed at retraining posture or stretching dystonic muscles are largely ineffective and not typically delivered as a part of standard of care. There is an urgent need for novel and effective therapies. Emerging technologies, specifically non-invasive brain stimulation (NBS), have demonstrated compelling evidence to make a meaningful impact in the lives of people with CD. In this study, individuals with cervical dystonia will be randomly assigned to receive tDCS for 15 minutes daily for 4 days in 1 of 4 stimulation location groups. Hypothesis 1: One location of stimulation will result in clear benefit with at least 1 standard deviation (SD) improvement in the CDQ-24, the primary outcome measure, at 1-week follow-up. Hypothesis 2: The cortical silent period will be the most sensitive measure investigated and will demonstrate significant increase in inhibition as determined by an elongation of silent period in the affected upper trapezius muscle. Hypothesis 3: The stimulation location determined to be most effective in Objective 1 will produce the greatest physiologic change in inhibition increase. Hypothesis 4: The hypothesis for this aim is if certain characteristics can predict response to treatment, a strong association will be seen between baseline measure(s) and the primary outcome measure. A thorough assessment of characteristics including: age, sex, duration of symptoms, genotyping for two specific polymorphisms, botulinum toxin history, baseline measures of outcome variables, measures of brain excitability, and genetic testing will predict response.
This is a study of patients with spasmodic dysphonia to determine how best to measure the severity of the disorder in patients. It addresses which characteristics of speech are the best indicator of whether or not a particular treatment has benefited a person with spasmodic dysphonia. We hope to recruit 20 participants each at 2 different centers. The evaluation for each participant will be done on a two visits, one just before and another several weeks after treatment.
Movement disorders such as dystonia, hypertonia, and spasticity interfere with or prevent voluntary movement. Studies have suggested that using biofeedback to increase awareness of muscle activation can improve motor function in patients with motor deficits. The investigators hypothesize that the daily use of a surface electromyographic (SEMG) biofeedback device for one month will improve motor function in children and young adults with dystonia, hypertonia, and/or spasticity. The SEMG biofeedback device is worn over the muscle(s) the subject has difficulty in controlling and provides vibratory feedback about muscle activation. Groups of children and young adults (ages 3-21), with dystonia, hypertonia, and/or spasticity will be asked to wear a small (approx 1 square inch) sensory feedback device on their affected muscle(s) for 5 hours a day for one month. The device will vibrate and emit a blue light when the muscle is activated. At the start of the experiment, subjects will be tested on the Goal Attainment Scale (GAS), the Pediatric/Adolescent Outcomes Data Collections Instruments (PODCI), and the Barry Albright Dystonia Scale (BAD). For one month, subjects will practice goals without device. After a month, subject will be assessed again and be given device to practice goals for a month. After one month, the subjects will be tested on the outcome measures again and return device.
To test the hypothesis that sedation induced by Dexmedetomidine at levels appropriate for awake, DBS surgery has no significant effect on electrophysiological parameters of DBS micro-electrode recordings