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A 2012 study suggests that players in the National Football League are three times more likely to die from neurodegenerative diseases, including Alzheimer's and Parkinson's diseases, than the general US population. [43] A 2018 study found 56% increase in risk of Parkinson's disease among US military veterans suffered traumatic brain injury. [42]
Parkinsonism is a clinical syndrome characterized by the four motor symptoms found in Parkinson's disease: tremor, bradykinesia (slowed movements), rigidity, and postural instability. [1] [2] Parkinsonism gait problems can lead to falls and serious physical injuries. Other common symptoms include:
Although genetics is the sole factor in a minority of cases, most cases of Parkinson's are likely a result of gene-environment interactions: concordance studies with twins have found Parkinson's heritability to be just 30%. [234] The influence of multiple genetic and environmental factors complicates epidemiological efforts. [238]
A brain tissue with Lewy bodies. The first major proposed cause of neuronal death in Parkinson's disease is the bundling, or oligomerization, of proteins.The protein alpha-synuclein has increased presence in the brains of Parkinson's Disease patients and, as α-synuclein is insoluble, it aggregates to form Lewy bodies (shown to left) in neurons.
[4] [3] [6] [8] It is most abundantly found in the brain and to a smaller extent in other tissues, such as the gut and heart. [6] Under pathological conditions in PD, alpha-synuclein undergoes a conformational change, resulting in a misfolded insoluble protein that aggregates into beta-sheets and forms protein inclusions called Lewy Bodies .
The exact cause of Parkinson’s disease is unknown. However, there are a few risk factors linked with the development of the disease. According to Johns Hopkins Medicine , those include:
Low-level inflammation is linked to a wide variety of chronic conditions, including heart disease, cancer, obesity, diabetes and neurodegenerative disorders, all of which can be considered, at ...
When a substance other than air fills an area of the lung it increases that area's density. On both x-ray and CT, this appears more grey or hazy as opposed to the normally dark-appearing lungs. Although it can sometimes be seen in normal lungs, common pathologic causes include infections, interstitial lung disease, and pulmonary edema. [2] [3]
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