Does deep brain stimulation help reduce freezing of gait in Parkinson's disease?
Freezing of gait is a common and disabling symptom in Parkinson's disease where a person suddenly feels unable to move their feet while walking. Deep brain stimulation (DBS) is a surgical treatment that uses electrical impulses to regulate abnormal brain activity. Research shows that DBS can help reduce freezing episodes, but the degree of improvement depends on factors like stimulation settings and whether the person is also taking Parkinson's medication.
What the research says
A systematic review of 31 studies found that DBS leads to a modest overall reduction in freezing of gait, as measured by the Freezing of Gait Questionnaire (FOG-Q), with an average decrease of about 3 points 1. The largest benefit was seen when DBS was used while the person was off their regular Parkinson's medication (medication-off/stimulation-on), with an average improvement of nearly 6 points on the FOG-Q 1. When DBS was combined with medication (medication-on/stimulation-on), the improvement was smaller (about 2.7 points) 1. A separate study of 17 patients with long-term DBS found that both stimulation alone and levodopa alone significantly reduced freezing episodes compared to no treatment, but individual responses varied: some patients improved more with medication, others with stimulation, and some did best with low-frequency stimulation (60 Hz) rather than the standard high-frequency (130 Hz) 9. Another review notes that freezing of gait is a complex symptom with no single brain target, and outcomes from DBS can be inconsistent across patients 10. A smaller study using a wearable device to measure gait also showed that DBS improved certain gait parameters, such as step length and swing time, which may help reduce freezing 11.
What to ask your doctor
- Could DBS be a good option for my freezing of gait, and which brain target (e.g., subthalamic nucleus) might work best for me?
- How does my current medication regimen interact with DBS for freezing symptoms?
- Should I consider low-frequency stimulation (60 Hz) if standard high-frequency stimulation does not help my freezing?
- What are the risks and potential side effects of DBS surgery for gait problems?
- How will we measure whether DBS is improving my freezing of gait over time?
This question is drawn from common patient questions about this topic and answered using cited medical research. We do not provide individualized advice.