Freezing of gait, an absence of forward progression of the feet despite the intention to walk, is a debilitating symptom of Parkinson's disease. Laser shoes that project a line on the floor to the rhythm of the footsteps help trigger the person to walk. The shoes benefit the wearer significantly, according to research by the University of Twente and Radboud university medical center, which will be published on December 20 in Neurology, the scientific journal of the American Academy of Neurology.Walking problems are common and very disabling in Parkinson’s disease. In particular, freezing of gait is a severe symptom which generally develops in more advanced stages. It can last seconds to minutes and is generally triggered by the stress of an unfamiliar environment or when medication wears off. Because the foot remains glued to the floor but the upper body continues moving forward, it can cause the person to lose her balance and fall.
Lines on the floor
Parkinson patient experience a unique phenomenon. By consciously looking at objects on the floor, such as the lines from a zebra crossing (‘visual cues’), and stepping over them, they are able to overcome their blockages during walking. This activates other circuits in the brain, hereby releasing the blockages and allowing the person to continue walking. This is why patients often make use of floor tiles at home. With the laser shoes, these useful cues can be continuously applied in everyday life, to walk better and safer. The principle behind the laser shoes is simple: upon foot contact, the left shoe projects a line on the floor in front of the right foot. The patient steps over or towards the line, which activates the laser on the right shoe, and so on.
The present research study shows a beneficial effect in a large group of patients. The number of 'freezing' episodes was reduced by 46% with the use of the shoes. The duration of these episodes was also divided by two. Both effects were strongest in patients while they had not taken their medication yet. This is typically when patients experience the most problems with walking. But an improvement was also seen after the patients had been taking their medication.
"Our tests were administered in a controlled lab setting with and without medication," says researcher Murielle Ferraye. " Further research in their everyday environment is necessary. We plan on testing this using laser shoes that in the meantime came on the market."
Activating the laser
Of the nineteen patients who tested the shoes, the majority would be happy to use them. The patients did not seem to mind that the laser was activated for each single step. "Ideally, the laser should only be activated once the blockage is detected, but we're not quite there yet," says Ferraye. "Freezing is a very complex phenomenon."
Murielle Ferraye, who developed the laser shoes, conducted her study at the Donders Institute at Radboud university medical center and the MIRA Institute for Biomedical Technology and Technological Medicine at the University of Twente.
Related news items
Vici grant for Michiel Vermeulen Reading the epitranscriptome15 April 2021
Michiel Vermeulen, theme Cancer development and immune defense, has been awarded a Vici grant from the Netherlands Organisation for Scientific Research (NWO), one of the largest personal scientific awards in the Netherlands.read more
2.5 million Euros for cancer research into ovarian cancer and immunotherapy15 April 2021
The Radboudumc receives 2.5 million Euros from the Dutch Cancer Society (KWF) for three studies to ensure oncological progress during COVID-19 period.read more
COVID-19 regulations for nursing homes have varying effects14 April 2021
On May 11th 2020, the Dutch Government allowed 26 nursing homes to welcome one visitor per resident, after two months of lockdown. An in-depth Radboudumc study monitored the feasibility of the regulations and the impact on the well-being of residents, their visitors, and healthcare staff.read more
Anti-inflammatory cytokine interleukin-37 is an inhibitor of trained immunity14 April 2021
Cell reports publication by Charles Dinarello and Mihai Netea and colleagues, theme Infectious diseases and global health, shows that the anti-inflammatory cytokine interleukin-37 is an inhibitor of trained immunity.read more
ADHD-related alterations in brain organization based on different brain profiles14 April 2021
Structural differences between the brains of people with and without ADHD are extensively reported. In accordance with earlier (ENIGMA) studies, and using a large cohort, a newly published study builds upon these by showing differences in brain organization that is based on different brain profiles.read more