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• W4387062363 abstract "PURPOSE: Although the ability to recover balance in the lateral direction has important implications regarding fall risk in older adults, the effects of visual input on balance recovery response to lateral perturbation and its age-related differences are not well studied. The purpose of this study was to investigate the effects of absence of visual input on balance recovery response to unpredictable lateral surface perturbations and its age-related differences. METHODS: Ten younger and ten older healthy adults were compared during balance recovery trials performed with the eyes open (EO) and eyes closed (EC). Outcomes included hip and ankle kinematics, kinetics, lower extremity muscle activity, and postural stability during balance recovery in response to unpredictable lateral surface perturbations. The percent (%) increase ((value in EC - value in EO) / (value in EO) × 100) of kinematics, EMG measures, and postural sway (standard deviation of the body’s center of mass acceleration) was calculated. A two-way mixed ANOVA (within: EO vs, EC, between: age) was used to test the effect of visual input and age. One-way MANOVA was used to compare % increase difference (EO-EC) between age groups. RESULTS: All kinematics, kinetics, and EMG variables were greater in EC compared to EO in both groups. Compared to younger adults, older adults demonstrated diminished balance recovery efficiency of generating plantar-flexion and hip abduction torques in EC. Older adults showed increased electromyography (EMG) peak amplitude of the soleus (p = 0.01) and gluteus medius (p = 0.03), reduced EMG burst duration of the gluteus maximus (p = 0.04) and medius (p = 0.03), and increased postural sway (p = 0.04) in EC. In addition, older adults showed smaller % increase (EC - EO) of the ankle eversion angle (p < 0.01), hip abduction torque (p = 0.03), EMG burst duration of the fibularis longus (p = 0.01), whereas greater % increase of postural sway (p = 0.01). CONCLUSIONS: Our findings demonstrated that visual input absence negatively affected the balance recovery mechanism more in older adults, and proprioceptive and vestibular sensory cues did not appear to compensate for the lack of visual cues to the same level as younger adults." @default.
• W4387062363 created "2023-09-27" @default.
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• W4387062363 date "2023-09-01" @default.
• W4387062363 modified "2023-09-27" @default.
• W4387062363 title "Effects Of Visual Input Absence On Balance Recovery Responses To Lateral Standing Surface Perturbations In Older And Younger Adults" @default.
• W4387062363 doi "https://doi.org/10.1249/01.mss.0000986820.56224.c1" @default.
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