![]() ![]() ![]() Richardson, who only recently retired from a career in neurology research.Ībout half of everyone with PSP has the Richardson’s syndrome type. The most common form is Richardson’s syndrome, after Dr. PSP is occasionally referred to as Steele-Richardson-Olszewski syndrome, after the three physicians who first described the disease in 1963. ![]() These figures are nearly identical wherever they have been carefully measured, which is in only three countries-the U.K., the U.S. and motor neuron disease elsewhere), ALS is easier to diagnose than PSP and often affects much younger people.Įach year an average of 1.1 people per 100,000 are newly diagnosed with PSP five or six people per 100,000 are living with the disease. The brain under the microscope is almost identical to that of “post-encephalitic parkinsonism,” a common condition in the early 20th century but now nearly extinct, which also made for erroneous diagnoses during that era.Īlthough PSP is slightly more common than the well-known amyotrophic lateral sclerosis (called ALS, or Lou Gehrig’s disease in the U.S. In retrospect, at least 12 cases of PSP had appeared in the medical literature between 19, but because of its resemblance to Parkinson’s, it wasn’t recognized as a distinct disease. PSP is rare: no one even realized it existed until 1963, when several patients were first described at a national neurology research convention and the disease was given its name.
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