Parkinson’s disease (PD) was first described by James Parkinson in his classic 1817 monograph “Essay on the Shaking Palsy”. PD is the second most prevalent neurodegenerative disorder after Alzheimer’s disease (AD). PD affects around 0.3% of population in industrialized countries and approximately 1% of the population above the age of 60 (de Rijk et al., 2000; Rajput, 1992). The mean age of onset of PD is 55. PD is mainly characterized clinically by resting tremor, rigidity and bradykinesia. Sometimes, postural instability is judged as a cardinal symptom, but it may be absent in the early stage of the disease, especially in the younger patients.
In PD patients with resting tremor, tremor or shaking happens when they are sitting or standing
In PD patients with resting tremor, tremor or shaking happens when they are sitting or standing