Gait & posture · 2026
Effect of visual cues on gait and muscle coactivation asymmetry in individuals with Parkinson's disease.
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Acquah Mirabel Ewura Esi, Wang Zengguang, Li Yongjin, Wang Binbin, Chen Wei, Gu Dongyun
Аннотация
BACKGROUND: Individuals with Parkinson's disease (PD) exhibit pronounced gait asymmetry and elevated lower-limb muscle coactivation during walking. Although visual cues are known to enhance gait performance in PD, their effect on gait asymmetry and interlimb motor coordination remains unclear.
AIM: Therefore, this study investigated the impact of visual cues on gait and on muscle coactivation asymmetry, as indicators of interlimb motor coordination during walking, in individuals with PD.
METHODS: In this cross-sectional, parallel-group study, 14 participants with idiopathic PD and 14 age-matched healthy controls completed walking trials under uncued and visually cued conditions. Spatiotemporal gait parameters and bilateral electromyographic (EMG) signals were recorded from the tibialis anterior (TA), gastrocnemius lateralis (GL), rectus femoris (RF), and biceps femoris (BF). Step length and muscle coactivation asymmetry indices were computed, and correlations with clinical severity measures were examined.
RESULTS: Results showed that step length increased significantly with visual cues in the PD group (p = 0.001), particularly in the more-affected leg, while no changes were observed in healthy controls. Visual cueing did not significantly alter overall thigh or shank coactivation levels; however, shank coactivation asymmetry decreased in 71% of participants with PD, whereas in healthy controls it increased (F = 5.56, p = 0.03). Moreover, higher Hoehn & Yahr scores were associated with greater reductions in shank coactivation asymmetry (R = -0.63, p = 0.02).
CONCLUSIONS: This study provides preliminary evidence that visual cues may enhance neuromuscular coordination in individuals with PD, particularly by reducing asymmetry in shank muscle coactivation.
AIM: Therefore, this study investigated the impact of visual cues on gait and on muscle coactivation asymmetry, as indicators of interlimb motor coordination during walking, in individuals with PD.
METHODS: In this cross-sectional, parallel-group study, 14 participants with idiopathic PD and 14 age-matched healthy controls completed walking trials under uncued and visually cued conditions. Spatiotemporal gait parameters and bilateral electromyographic (EMG) signals were recorded from the tibialis anterior (TA), gastrocnemius lateralis (GL), rectus femoris (RF), and biceps femoris (BF). Step length and muscle coactivation asymmetry indices were computed, and correlations with clinical severity measures were examined.
RESULTS: Results showed that step length increased significantly with visual cues in the PD group (p = 0.001), particularly in the more-affected leg, while no changes were observed in healthy controls. Visual cueing did not significantly alter overall thigh or shank coactivation levels; however, shank coactivation asymmetry decreased in 71% of participants with PD, whereas in healthy controls it increased (F = 5.56, p = 0.03). Moreover, higher Hoehn & Yahr scores were associated with greater reductions in shank coactivation asymmetry (R = -0.63, p = 0.02).
CONCLUSIONS: This study provides preliminary evidence that visual cues may enhance neuromuscular coordination in individuals with PD, particularly by reducing asymmetry in shank muscle coactivation.