Innovative approaches in Parkinson’s research
Parkinson’s research has made remarkable progress that has the potential to improve the lives of Parkinson’s sufferers. Swiss researchers, originally focussing on the treatment of paraplegics, have developed an epidural neuroprosthesis that now also gives new hope to people with Parkinson’s disease. This ground-breaking technology could make a decisive contribution to improving the gait of Parkinson’s patients. The team has presented these findings in Nature Medicine (2023; DOI: 10.1038/s41591-023-02604-0).
From paraplegia to Parkinson’s treatment
The history of this innovative treatment method began with the development of epidural electrical stimulation (EES) for patients with incomplete paraplegia. The team led by Grégoire Courtine from the Ècole Polytechnique Fédérale de Lausanne first presented this procedure five years ago. The implant, consisting of 16 electrodes, is attached directly to the dura in the lumbosacral region and enables patients to activate certain movement patterns. This was a breakthrough that allowed them to move independently with the support of a rollator or in a recumbent bike.
Significance for Parkinson’s research
The application of this technology in Parkinson’s patients marks a significant advance in Parkinson’s research. The first patient to benefit from this technology had been suffering from Parkinson’s disease for almost three decades. His movement disorder had recently worsened due to pronounced “freezing“, which significantly impaired his everyday life due to frequent falls. With the neuroprosthesis, he was able to move more naturally again, supported by the effect of deep brain stimulation (DBS).
Technology and mode of action
The EES stimulates afferent nerve fibres at the posterior horn of the spinal cord, which activates certain muscles via a reflex. In Parkinson’s patients, the problem lies in the fine-tuning of motor skills. The impulses generated by the neuroprosthesis reinforce the natural muscle contractions and thus enable more fluid movements. The exact sequence of the necessary impulses was first determined in healthy people and in experiments with rhesus monkeys in which Parkinson’s syndrome was triggered.
Life-changing results
The results for the 63-year-old patient, who is being cared for by neurosurgeon Jocelyne Bloch at Lausanne University Hospital, are impressive. Before the EES system was implanted, he was able to walk 433 metres with an activated brain pacemaker and only 224 metres without in the 6-minute walk test. With the neuroprosthesis, his gait improved significantly. He was once again able to move without assistance and hardly suffered any falls. It is particularly remarkable that the “freezing” episodes disappeared almost completely after the neuroprosthesis was switched on.
Future prospects and further research
This development is a significant step forward in Parkinson’s research. The patient has now been using the neuroprosthesis for around eight hours a day for almost two years and can take longer walks without additional assistance. The team now plans to conduct a study with six patients to further investigate the efficacy and safety of this treatment. This research could not only improve the lives of Parkinson’s patients, but also open up new avenues in the treatment of movement disorders.
Conclusion on spinal cord stimulation for Parkinson’s disease
Thanks to the work of dedicated scientists and the application of innovative technologies such as the epidural neuroprosthesis and also THS, Parkinson’s research is on the verge of many possible innovations. These developments not only offer new treatment options, but also hope for people living with this challenging disease.