Effectiveness of Targeting the Zona Incerta (ZI) for Tremor Control in Parkinson's Disease Patients
试验速览
- 阶段
- 不适用
- 状态
- 进行中（未招募）
- 入组人数
- 20
- 试验地点
- 2
- 主要终点
- Tremor
研究概览
简要总结
Researchers have found that a treatment called Magnetic Resonance guided Focused Ultrasound (MRgFUS) can effectively reduce tremors in patients with essential tremor (ET) and Parkinson's disease (PD). They noticed that ET patients initially responded better to the treatment than PD patients, but by the end of the treatment, both groups showed similar improvement. The study also suggested that targeting a specific area of the brain called the Zona Incerta (ZI) may be more beneficial for PD patients. Based on these findings, the investigators plan to use low-intensity focused ultrasound to directly modulate the ZI area and investigate the mechanisms of reduced tremors in PD patients. The investigators will also compare the effectiveness of this approach with the current target, the ventral intermediate nucleus (Vim) of the thalamus. The investigators will use a simulation model to determine the best ultrasound parameters for this new approach and will also examine the impact of the treatment on the brain's network activity using functional Magnetic Resonance Imaging. Success of this project may lay the foundation for finding a more effective target for MRgFUS treatment of PD tremor.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Crossover
- 主要目的
- Basic Science
- 盲法
- None
入排标准
- 年龄范围
- 40 Years 至 80 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •Confirmed diagnosis of Parkinson's disease
- •Resting tremor score (MDS-UPDRS III 3.17 Rest Tremore Amplitude (RUE or LUE)) ≥ 2
- •Between the ages of 40-80 years
- •Hoehn and Yahr stage between 1-3 (mild to moderate PD) in the "ON" state
- •Patients who are willing to have a partial (~8 cm diameter circular area above the ear) hair shaving.
排除标准
- •Atypical Parkinsonism
- •History of essential tremor
- •Dementia preventing informed consent
- •Change in Parkinson's medication with the last 2 weeks
- •Neurological disease other than PD, including Alzheimer's disease, multi-infarct dementia, Huntington's disease, normal pressure hydrocephalus, a brain tumor, progressive supranuclear palsy, seizure disorder, subdural hematoma, multiple sclerosis, or history of significant head trauma
- •Unstable medical conditions or serious disease/conditions (e.g., cancer undergoing active treatment, poorly controlled diabetes)
- •Concurrent treatment for PD with Duodopa
- •Concurrent treatment for PD with deep brain stimulation (DBS)
- •Thickness of the temporal bone < 7 mm
- •Individuals should also not participate if they have any of the following contraindications for undergoing fMRI scanning:
- •Cardiac pacemaker, wires, or defibrillator
- •Metal in eye or orbit, including the history of any eye injury involving metal fragments and increased risk due to (history of) working as a metal worker (grinding, machining, or welding)
- •Ferromagnetic aneurysm clip
- •Possibility of pregnancy
- •Artificial heart valve
- •Ear or eye implant, including cochlear implant
- •Brain aneurysm clip
- •Implanted drug infusion pump
- •Electrical stimulator to nerves or bones
- •Coil, catheter, or filter in any blood vessel
- •Orthopedic hardware (artificial joint, plate, screw, rod)
- •Other metallic prostheses
- •Shrapnel, bullets, or other metal fragments
- •Surgery, piercings or tattoos (including tattooed eyeliner) in the last six weeks
- •Medication releasing skin patches (i.e. nicotine, birth control, nitroglycerine)
- •History of claustrophobia
结局指标
主要结局
Tremor
时间窗: At 50Hz for 40 minutes 30 minutes after intervention
Finger displacement (angle \[deg\]).
Functional connectivity
时间窗: Once before and once immediately after intervention
fMRI
次要结局
未报告次要终点
研究者
Martin McKeown
Principal Investigator
University of British Columbia