It is a life skill that everyone cherishes: the ability to quickly jot down thoughts, shopping lists, or ideas on paper. However, a new study warns that a slowdown in writing speed could serve as an early warning sign of dementia.
Study Overview
Researchers in Portugal measured the handwriting speed of 58 adults in their 80s, including 38 individuals with mild cognitive impairment (MCI), a potential precursor to dementia. They found that all participants wrote at similar speeds when performing simple tasks, such as drawing horizontal lines or dots, but significant differences emerged during dictation tasks.
Key Findings
Participants with cognitive impairment wrote significantly slower than those without the condition when asked to listen to a spoken sentence and transcribe it. Dr. Ana Rita Matias, assistant professor at the University of Evora and lead researcher, stated: 'Writing is not just a motor activity, it is a window into the brain. Dictation tasks are more sensitive because they require the brain to do multiple things at once: listen, process language, convert sounds into written form, and coordinate movement.'
Scientists tracked writing speed using a digital pen and pad. The study revealed that those with cognitive impairment took longer to start writing and exhibited altered stroke patterns, resulting in more fragmented and less continuous handwriting. After hearing a complex sentence, differences in vertical text size were also observed.
Implications for Dementia Monitoring
The researchers suggest that handwriting tests could be a low-cost method for monitoring cognitive decline. Currently, the gold-standard diagnostic test for early dementia is the Montreal Cognitive Assessment (MoCA), a 10-minute questionnaire. However, this writing trait could serve as an easy marker for concerned individuals or families.
Experts warn of rising dementia cases in the US, where about half a million people are diagnosed annually, with projections doubling to one million per year by 2060. The number of Americans living with the condition could rise from six million to nearly 14 million over the same period, driven by an aging population and increased life expectancy.
The study was published in Frontiers in Human Neuroscience.
