Eye tests predict which Parkinson s patients will develop dementia Jonathan Chadwick For Mailonline © Provided by Daily Mail MailOnline logo
Eyesight tests could be used to identify which people with Parkinson s disease are likely to suffer from cognitive impairment and possible dementia 18 months later.
UK researchers have found that people with Parkinson s who perform less well in eye tests show worse cognitive performance a year and a half later.
The study is one of two by University College London (UCL) published this month looking at people with Parkinson s – the progressive nervous system disorder that causes shakiness and stiffness.
The second study found structural and functional connections of brain regions become decoupled throughout the entire brain in people with Parkinson’s disease, particularly among people with vision problems.
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.In the study, 177 individuals 95 of whom had symptomatic cases of COVID-19 and 82 of whom neither tested positive for COVID-19 nor had symptoms of the virus had their underarm sweat tested by a group of six dogs trained in scent-based detection. Three of the dogs involved in the study had been trained to sniff out explosives, two were trained in colon cancer detection, and one had been trained as a search and rescue dog.
The dogs were then trained to detect COVID by smelling a COVID-positive sweat sample and subsequently being asked to sniff out the same scent in a randomized lineup of COVID-positive and COVID-negative underarm sweat samples. To indicate the presence of COVID, the dogs were trained to sit in front of the positive samples. Among the group of six dogs trained to do so, accuracy rates for sniffing out COVID ranged between 76 percent and 100 percent.