What Is Parkinson’s Disease? Zyana Morris Illness June 26, 2016basal ganglia, full time medical care giver, muscle control, parkinson disease, slowed movement 0 Comment Parkinson’s disease is a brain disorder that leads to a gradual loss of muscle control. Read more Zyana MorrisZyana Morris is a passionate Health and Lifestyle Blogger who loves to write on prevailing Trends. She is a featured author at various authoritative blogs. You can follow her through Facebook and Twitter.