t concluded studies so far conducted contend the world has approximately 6.3 million people who are experiencing Parkinson’s disease (PD) (Medtronic, 2010). Out of this global population, 1.2 million emanate from Europe whereby according to varied medical practitioners and researchers the number keeps on increasing by the day. (Grosset, Fernandez, Katherine and Okun (2009) in their study claim approximately 750,000 up to 1Million are USA citizens whereas between 120,000 and 130,000 emanate from UK. However, PD’s prevalence and incidence studies for long have been affected by survival rates whereby the former is higher compared to the latter (Grosset, Fernandez, Katherine & Okun, 2009). Consequently, this implies those at risk of contracting PD their respective age is over 50 years as depicted in Figure 1. According to Grosset, Fernandez, Katherine and Okun (2009) study, the earliest symptoms of PD among numerous patients usually start showing up at 60 years. Hence, implying the disease is quite common among the elderly especially those whom their ages fall between 75 and 85 years living in Europe and USA’s regions (Peretz et al. 2014, p. 70). People comprising this demography their number in these regions is currently showing a rapid increase besides having complications that contribute to PD problem (Peretz et al. 2014, p. 70). This is because of dysfunction of nigra neurons, which are susceptible to loss with age (Reeve, Eve & Doug Turnbull, 2014, p. 19).
Figure 1: Grosset, Fernandez, Katherine & Okun. (2009). Prevalence of Idiopathic PD by age. [E-Book] Available at: [Accessed 1st June 2014]
Besides age, studies have also confirmed environmental and ethnicity comprises key predisposing factors towards contracting PD predicament. Globally, PD