Parkinson's Disease Essay

1865 WordsFeb 5, 20138 Pages
LEE, Jun Ho Neurological Disorders Shanghai Singapore International School 2011 Length: 1320 Words Introduction Figure 1. The position of substantia nigra and the structure of neurons. (Glass, 2010) Nowadays, there is a great development in medical technology. However, there are still lots of neurological disorders left uncured. Parkinson’s disease (PD) is one of them. Every year, there are 50,000-60,000 new cases of PD and there are 4 to 6 millions of people who are suffering of this disease. (National Parkinson Foundation, N.D). There is no definite cure for this disease but a lot of scientists believe that the deep brain stimulation (DBS) can give relief to the symptoms of PD. Background Information The PD is a neurodegenerative brain disorder which progresses slowly in a lot of people (National Parkinson Foundation, N. D). The main cause of PD is lack of production of a chemical called dopamine. The dopamine is a chemical which serves as a neurotransmitter that allows transfer of signals between substantia nigra, a part of the brain in charge of body movement (WEMOVE, 2011) and corpus striatum, another part of brain controls body movement (Smith, 2011) (Glass, 2010). According to Figure 1(Glass, 2010), it shows the position of the subtantia nigra in the brain as well as the neurons which produces the dopamine. When there is deterioration of neurons inside the substantia nigra, the function of communication becomes unusual, causing difficulties of controlling body movement. (Glass, 2010) One of the most common symptoms is bradykinesia. While experiencing this, the motion of the person would slow down. The PD would disable your ability to carry out voluntary movements. It may also slow down you movement. For example, when people walk, the steps could be shortened and shuffling. Worse, people would have hard time making the first step (Mayo Clinic

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