Focused Ultrasound Shown to Improve Motor Symptoms in Parkinson Disease
Focused ultrasound subthalamotomy was shown to improve motor features among patients with Parkinson disease who present with asymmetric symptom severity.
Focused ultrasound subthalamotomy was shown to improve motor features among patients with
As a minimally invasive image-guided procedure,
“This allows doctors to interrupt faulty brain circuits or destroy unwanted tissue,” explains an accompanying
Notably, deep-brain structures influenced by the procedure include the subthalamic nucleus, which researchers say is the preferred neurosurgical target for
Collaborating with the Centro Intregral de Neurociencias in Spain, researchers of the University of Virginia (UVA) Department of Neurology recruited 40 volunteers in the randomized, double-blind study. At a 2:1 ratio, participants with asymmetric PD who had motor signs not fully controlled by medication or who were ineligible for DBS received either focused ultrasound subthalamotomy (n = 27) on the side opposite their main motor signs or a sham procedure (n = 13).
In the study, researchers assessed the primary efficacy outcome of between-group difference in the change from baseline to 4 months in the
For participants given the procedure, the mean MDS-UPDRS III score for the most affected side showed a decrease from 19.9 at baseline to 9.9 at 4 months (least-squares mean difference (LSMD) = 9.8 points; 95% CI, 8.6–11.1), compared with a decrease from 18.7 to 17.1 in the control group (LSMD = 1.7 points; 95% CI, 0.0–3.5), exhibiting a significant between-group difference of 8.1 points (95% CI, 6.0–10.3; P < .001).
Addressing the safety aspects of the procedure, adverse events in the treatment group included dyskinesia, weakness on the treated side, speech disturbance, facial weakness, and gait disturbance. “In 6 patients in the active-treatment group, some of these deficits were present at 12 months,” noted researchers.
"This small brain region, the subthalamic nucleus, had a very strong and potent effect on parkinsonian symptoms when we targeted it with precise, focused ultrasound energy," said study author Jeff Elias, MD, neurosurgeon at UVA Health, in a
Reference
Martínez-Fernández R, Máñez-Miró JU, Rodríguez-Rojas R, et al. Randomized trial of focused ultrasound subthalamotomy for Parkinson disease. N Engl J Med. Published online December 24, 2020. doi:10.1056/NEJMoa2016311
Newsletter
Stay ahead of policy, cost, and value—subscribe to AJMC for expert insights at the intersection of clinical care and health economics.
Related Articles
- Promising Early Efgartigimod Response Data for Generalized Myasthenia Gravis
September 18th 2025
- Metabolic Issues More Common in Patients With HIV
September 18th 2025
- Barriers to Gender-Affirming Surgery Persist Despite High Satisfaction Rate
September 18th 2025
- Eating Behaviors May Predict GLP-1 Therapy Success in Type 2 Diabetes
September 18th 2025