Postural Control Determinants of Gait Dysfunction in Huntington's Disease

Area of Science:

• Neurology
• Biomechanical Engineering
• Movement Science

Background:

• Gait dysfunction is a significant challenge in Huntington's disease (HD).
• The relationship between postural control deficits and gait problems across the HD spectrum (pre-manifest HD [pHD] to manifest HD [mHD]) is not well understood.

Purpose of the Study:

• To investigate the interplay between posture and gait in individuals with HD.
• To quantify postural control and gait deficits across the HD spectrum.
• To determine the contribution of postural control impairments to gait dysfunction in HD.

Main Methods:

• Utilized wearable sensors to measure postural control (Jerk, Total Sway Area) under sensory-challenging conditions.
• Assessed gait quality (e.g., stride length, cadence, %stance) and stride-to-stride variability at self-selected pace.
• Compared outcomes between healthy controls (n=10), pHD (n=17), and mHD (n=11) groups, and used regression analyses to link postural control to gait deficits.

Main Results:

• Both postural control and gait impairments were observed in pHD and significantly worsened in mHD (P < .05).
• Postural control deficits accounted for 14% to 39% of the variance in gait dysfunction, including gait quality and variability measures (P < .05).

Conclusions:

• Postural control and gait deficits emerge in the pre-manifest stage of HD and progress with the disease, underscoring the importance of early interventions.
• Postural control impairments are a substantial contributor to gait deficits in HD, not merely a coincidental finding.
• Further research is needed to integrate these posture-gait findings into clinical gait rehabilitation strategies for HD.