Early detection of Parkinson’s disease through handwriting
The primary tool for diagnosing Parkinson’s is the diagnostic ability of the physician. A new study compares the writing process of 40 sick and healthy subjects and suggests an innovative and noninvasive method of diagnosing Parkinson’s at a fairly early stage.
Sep. 9, 2013 — Today’s primary tool for diagnosing Parkinson’s disease is the diagnostic ability of the physician, who can generally identify the clinical symptoms only when the disease is at a relatively advanced stage. A new joint study by researchers at the University of Haifa and Rambam Hospital that compared the handwriting of 40 sick and healthy subjects suggests an innovative and noninvasive method of diagnosing Parkinson’s at a fairly early stage.“Identifying the changes in handwriting could lead to an early diagnosis of the illness and neurological intervention at a critical moment,” explains Prof. Sara Rosenblum, of the University of Haifa’s Department of Occupational Therapy, who initiated the study.The methods for diagnosing Parkinson’s today are a physician evaluation or a test called SPECT, which uses radioactive material to image the brain. The latter, however, is no more effective in diagnosing the illness than an expert doctor and it exposes the patient to unnecessary radiation.Studies from recent years show that there are unique and distinctive differences between the handwriting of patients with Parkinson’s disease and that of healthy people. However, most studies that to date have focused on handwriting focused on motor skills (such as the drawing of spirals) and not on writing that involves cognitive abilities, such as signing a check, copying addresses, etc.According to Prof. Rosenblum, Parkinson’s patients report feeling a change in their cognitive abilities before detecting a change in their motor abilities and therefore a test of cognitive impairment like the one performed in this study could attest to the presence of the disease and offer a way to diagnose it earlier.This research was conducted in cooperation with Dr. Ilana Schlesinger, head of the Center for Movement Disorders and Parkinson’s Disease at Haifa’s Rambam Medical Center and occupational therapists working in the hospital. In the study, the researchers asked the subjects to write their names and gave them addresses to copy, two everyday tasks that require cognitive abilities. Participants were 40 adults with at least 12 years of schooling, half healthy and half known to be in the early stages of Parkinson’s disease (before obvious motor signs are visible).The writing was done on a regular piece of paper that was placed on electronic tablet, using a special pen with pressure-sensitive sensors operated by the pen when it hit the writing surface. …
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