"Following Muhammad Ali’s death, there has been persistent dialogue about the degree to which Parkinson disease vs repetitive boxing-related head trauma contributed to his progressive motor and cognitive impairments."
The authors go on to say, "Muhammad Ali’s disease course, from his late 30s until his death at age 74 years, was chronic and progressive. He manifested fatigue, hypophonia, bradykinesia, and a masked face, as well as many of the visible motor symptoms of Parkinson disease. He was clearly responsive to levodopa, as documented in his several examinations in the early 1980s, a feature usually not present following traumatic brain injury."
Where this is leading is, "A 34-year chronic progressive presentation with asymmetric levodopa responsive resting tremor, accompanied by other classical features, provides strong evidence for a diagnosis of idiopathic Parkinson disease. In contrast, posttraumatic tremor is commonly transitory, and manifests as a postural and/or kinetic tremor. In addition, posttraumatic tremor is not accompanied by progressive cogwheel rigidity and bradykinesia, both observed in Ali. Head trauma is a known risk factor for the later onset of idiopathic Parkinson disease; however, a causative association in the Ali case cannot be determined."
In conclusion, "Many patients with young-onset idiopathic Parkinson disease presenting like Muhammad Ali have been misdiagnosed or have experienced a delayed diagnosis. The greater emphasis of the public on his obvious boxing-related sequalae frequently overshadowed the diagnosis of an early-onset case of Parkinson disease."
"The Muhammad Ali case reinforces the dangers of the press, public, and health care professionals in speculating on medical diagnoses."
jamanetwork.com/journals/ja...
Ken Burns documentary: youtu.be/PrHxQt6bzZ8
Personal experience in comments.
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