Vestibulopathy and age effects on head stability during chair rise.
Vestibulopathy and age effects on head stability during chair rise.
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前庭病和年龄对椅子上升过程中头部稳定性的影响。
DOI：
10.1080/000164801300006272
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发表时间：
2001
影响因子：
1.4
通讯作者：
Scarborough,DM
中科院分区：
文献类型：
--
作者：
McGibbon,CA;Krebs,DE;Scarborough,DM
目前尚不清楚前庭功能障碍和年龄如何不同地影响功能活动期间的平衡控制。本研究的目的是深入了解年龄和前庭病变对从椅子上站起来时头部控制的影响。在双侧前庭功能减退（BVH）患者和30-80岁的健康受试者中研究了头相对于躯干（头对躯干）矢状面角度和线性控制策略。采用双因素方差分析比较了从座椅上起飞时不同年龄（年轻与老年）和诊断（健康与BVH）的头-躯干运动学。角度控制策略随年龄而异，但不随诊断而异：年轻（健康和BVH）受试者在空间中稳定头部旋转，而老年（健康和BVH）受试者在躯干上稳定头部旋转。相比之下，线性控制策略不同的诊断，但不是年龄：BVH科目（年轻和老年人）允许更大的速度头上躯干翻译，而健康的科目（年轻和老年人）抑制这种翻译。年轻的BVH受试者在没有功能性前庭系统的情况下稳定了头在空间的旋转（年轻的健康受试者也是如此），这表明颈结肠反射和：或前庭损失的其他感觉补偿。老年BVH受试者稳定的头部旋转相对于躯干，健康的老年人，但没有稳定的头对躯干的翻译，这表明依赖于被动的机械反应的颈部感觉头部运动。我们的结论是，前庭病变患者使用的补偿策略是年龄依赖性的，似乎是更容易处理的年轻BVH患者。
It is unknown how vestibular dysfunction and age differentially affect balance control during functional activities. The objective of this study was to gain insight into the effects of age and vestibulopathy on head control when rising from a chair. Head relative to trunk (head-on-trunk) sagittal plane angular and linear control strategies were studied in patients with bilateral vestibular hypofunction (BVH) and in healthy subjects aged 30-80 years. A two-way analysis of variance was used to compare head-on-trunk kinematics by age (young vs elderly) and diagnosis (healthy vs BVH) at the time of liftoff from the seat. Angular control strategies differed with age but not diagnosis: young (healthy and BVH) subjects stabilized head rotations in space while elderly (healthy and BVH) subjects stabilized head rotations on the trunk. In contrast, linear control strategies differed by diagnosis but not age: BVH subjects (young and old) allowed a greater rate of head-on-trunk translation while healthy subjects (young and old) inhibited such translations. Young BVH subjects stabilized head-in-space rotations (as did young healthy subjects) without a functioning vestibular system, suggesting cervicocollic reflex and:or other sensory compensation for vestibular loss. Elderly BVH subjects stabilized head rotation with respect to the trunk, as did healthy elders, but did not stabilize head-on-trunk translations, suggesting a reliance on passive mechanical responses of the neck to sense head movements. We conclude that compensation strategies used by patients with vestibulopathy are age-dependent and appear to be more tractable in the younger BVH patient.