Evaluating gait and postural responses to subthalamic stimulation and levodopa: A prospective study using wearable...

Area of Science:

• Neuroscience
• Neurology
• Biomedical Engineering

Background:

• The impact of subthalamic stimulation on axial Parkinson's disease (PD) symptoms, particularly gait and posture, remains a subject of debate.
• This study investigates the effects of subthalamic deep brain stimulation (STN-DBS) and levodopa on gait and postural dynamics in PD patients.

Purpose of the Study:

• To quantitatively assess the efficacy of STN-DBS and levodopa on spatiotemporal gait and postural parameters in Parkinson's disease.
• To compare the effects of STN-DBS versus levodopa on specific gait and postural metrics.

Main Methods:

• Utilized wearable sensor technology to analyze gait and posture in 33 PD subjects.
• Evaluated subjects pre-operatively and 6 months post-STN-DBS surgery under various medication and stimulation conditions (OFF/ON).
• Calculated Standardized Response Mean (SRM) to determine treatment responsiveness.

Main Results:

• STN-DBS significantly enhanced gait speed, stride length, and turning compared to levodopa.
• Levodopa showed moderate improvements in stride time variability and asymmetry.
• Postural parameters showed minimal changes with STN-DBS, though some slight benefits were noted with stimulation.

Conclusions:

• STN-DBS and levodopa positively impact gait and posture in Parkinson's disease.
• STN-DBS demonstrates superior efficacy for improving gait speed, stride length, and turning.
• Current therapies do not adequately address gait variability, indicating a need for novel treatment strategies.