Clinical and Rest-fMRI Effects of Virtual Reality Practice on Motor and Cognitive Symptoms in Parkinson's Disease, a Randomized Control Trial

Parkinson's Disease (PD) is one of the most common neurodegenerative disease. Bradykinesia, tremor, resting tremor and postural instability are the main motor characteristics of this disease. As the disease progresses, mobility, walking, balance are reducing, the risk of falls is increasing and patients become functionally dependent. Along with these symptoms, cognitive functions are also disturbed. The most commonly distorted cognitive functions are executive functions such as planning and reasoning, working memory, episodic memory, attention and visual-spatial skills. Pharmacological and surgical treatments are used in Parkinson's disease. Pharmacologic treatment has a proven effect on motor symptoms, but since there is no approved pharmacologic treatment which has a direct effect on cognitive functions, recent studies suggest non-pharmacological treatments to improve cognitive function. Physiotherapy is also accepted among non-pharmacological treatments. Conventional physiotherapy focuses on optimizing patient independence and safety, focusing on hinting strategies, cognitive movement strategies and exercises utilizing transfers, posture, upper extremity function, balance (and falls), gait, physical capacity and (in)activity. Virtual Reality (VR) technology, a promising commonly used new rehabilitation tool, is a treatment method that can be used as one of the non-pharmacological treatment methods in Parkinson's Disease. In order to understand how neuronal network dysfunction in the Parkinson's Disease leads to clinical symptoms, both the component elements and the interconnections within these networks need to be examined in greater detail. Studies of resting state-fMRI (rs-fMRI) use correlation of activation of brain regions and time series fluctuations between brain regions to give information about connectivity in brain.

The purpose of this study is to investigate the therapeutic effects of virtual reality on motor and cognitive symptoms of PD. Furthermore, the investigation of possible effects of this effect on neuroplasticity through functional brain networks is our other objective. This study will be the first study to evaluate the plasticity effect of virtual reality application with rs-fMRI in Parkinson's disease.