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مهندسی مکانیک مدرس، جلد ۲۵، شماره ۵، صفحات ۲۷۹-۲۸۴
عنوان فارسی Head Stabilization during Walking in People with Unilateral Vestibular Disorder
چکیده فارسی مقاله Background
Head stabilization plays a crucial role in locomotive tasks such as walking, but it can be impaired in individuals with unilateral vestibular disorder (UVD). This study aimed to evaluate the impact of UVD, environmental lighting, and gait speed on head stabilization during walking. The hypothesis was that people with UVD (PwUVD) restrict their head movements while walking, and faster walking speeds and darker environments would worsen head stabilization.
Methods
Eight PwUVD and nine healthy individuals were asked to walk along a 6-meter walkway at their preferred pace, as well as at 25% slower and 25% faster paces, either in normal or in dark environments. Motion analysis was utilized to measure head movement and calculate variability, range, and approximate entropy of the head kinematic data.
Results
Healthy individuals exhibited higher variability of head acceleration compared to patients in the forward (p=.020), lateral (p=.042), and vertical (p=.001) directions. The lighting conditions had a significant impact on the variability of the vertical component of head acceleration (p=.009). Gait speed also significantly influenced the variability of head acceleration in all directions (p<.001). Furthermore, the range of head acceleration was greater in healthy individuals than in patients, particularly in the forward (p=.006) and vertical (p<.001) directions. PwUVD exhibited significantly higher approximate entropy of head displacement and velocity (p<.033). Conclusion.
Conclusion
The findings suggest that head stabilization serves as a compensatory mechanism in PwUVD, particularly at higher gait speeds. However, walking in a dark environment limited the effectiveness of this strategy.
کلیدواژه‌های فارسی مقاله
عنوان انگلیسی Head Stabilization during Walking in People with Unilateral Vestibular Disorder
چکیده انگلیسی مقاله Background
Head stabilization plays a crucial role in locomotive tasks such as walking, but it can be impaired in individuals with unilateral vestibular disorder (UVD). This study aimed to evaluate the impact of UVD, environmental lighting, and gait speed on head stabilization during walking. The hypothesis was that people with UVD (PwUVD) restrict their head movements while walking, and faster walking speeds and darker environments would worsen head stabilization.
Methods
Eight PwUVD and nine healthy individuals were asked to walk along a 6-meter walkway at their preferred pace, as well as at 25% slower and 25% faster paces, either in normal or in dark environments. Motion analysis was utilized to measure head movement and calculate variability, range, and approximate entropy of the head kinematic data.
Results
Healthy individuals exhibited higher variability of head acceleration compared to patients in the forward (p=.020), lateral (p=.042), and vertical (p=.001) directions. The lighting conditions had a significant impact on the variability of the vertical component of head acceleration (p=.009). Gait speed also significantly influenced the variability of head acceleration in all directions (p<.001). Furthermore, the range of head acceleration was greater in healthy individuals than in patients, particularly in the forward (p=.006) and vertical (p<.001) directions. PwUVD exhibited significantly higher approximate entropy of head displacement and velocity (p<.033). Conclusion.
Conclusion
The findings suggest that head stabilization serves as a compensatory mechanism in PwUVD, particularly at higher gait speeds. However, walking in a dark environment limited the effectiveness of this strategy.
کلیدواژه‌های انگلیسی مقاله Unilateral Vestibular Disorder,Head Stabilization,Gait,Vision,kinematics
نویسندگان مقاله فرزانه حبیبی | Farzaneh Habibi
Tarbiat Modares University
دانشگاه تربیت مدرس

محمد نجفی آشتیانی | Mohammed N. Ashtiani
Tarbiat Modares University
دانشگاه تربیت مدرس

سعیده مهرکیان | Saeideh Mehrkian
University of Social Welfare and Rehabilitation Sciences
دانشگاه علوم بهزیستی و توانبخشی

نشانی اینترنتی http://mme.modares.ac.ir/browse.php?a_code=A-10-69327-2&slc_lang=fa&sid=15
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