PDF(Pubmed)
Abstract：
UNASSIGNED: Differences in motor control between the lower limbs may influence the risk of sports injury and recovery from rehabilitation. In this study, differences in the visual feedback ability of the left and right lower limbs were assessed using visual target tracking tasks.
UNASSIGNED: Thirty-four healthy young subjects (aged 20.4 ± 1.2 years) were asked to move their bodies back and forth while tracking a visual target displayed on a monitor in front of them for 30 s. The two target motions were sinusoidal (i.e., predictable patterns) and more complex (random) patterns. To assess the ability of the lower limbs to follow visual target tracking, antero-posterior CoP (right limb, CoPap-r; left limb, CoPap-l) and medio-lateral CoP (right limb, CoPml-r; left limb, CoPml-l) data were measured using a stabilometer. Tracking ability by visual feedback ability was calculated as the difference in displacement between the target signal and the trajectories of the right and left pressure centers as trapezoidal areas, and a smaller sum of area (SoA) over the entire measurement time was defined as a greater tracking ability.
UNASSIGNED: Regarding the SoA in the anterior-posterior CoP, the mean SoA in the sinusoidal and random tasks was significantly lower in the CoP-r data than in the CoP-l data, indicating that the right lower limb had a more remarkable ability to follow visual target tracking. Regarding the SoA in the medial-lateral direction (CoP), the mean SoA in the sinusoidal and random tasks did not significantly differ between the two legs.
UNASSIGNED: The right lower limb may have a tracking function activated by the target signal when responding to visual stimuli. Identifying the motor strategies of each lower limb in response to visual stimuli will not only help identify potential differences between each lower limb but also suggest the possibility of enhancing the role of each lower limb in balance control.
UNASSIGNED: Thirty-four healthy young subjects (aged 20.4 ± 1.2 years) were asked to move their bodies back and forth while tracking a visual target displayed on a monitor in front of them for 30 s. The two target motions were sinusoidal (i.e., predictable patterns) and more complex (random) patterns. To assess the ability of the lower limbs to follow visual target tracking, antero-posterior CoP (right limb, CoPap-r; left limb, CoPap-l) and medio-lateral CoP (right limb, CoPml-r; left limb, CoPml-l) data were measured using a stabilometer. Tracking ability by visual feedback ability was calculated as the difference in displacement between the target signal and the trajectories of the right and left pressure centers as trapezoidal areas, and a smaller sum of area (SoA) over the entire measurement time was defined as a greater tracking ability.
UNASSIGNED: Regarding the SoA in the anterior-posterior CoP, the mean SoA in the sinusoidal and random tasks was significantly lower in the CoP-r data than in the CoP-l data, indicating that the right lower limb had a more remarkable ability to follow visual target tracking. Regarding the SoA in the medial-lateral direction (CoP), the mean SoA in the sinusoidal and random tasks did not significantly differ between the two legs.
UNASSIGNED: The right lower limb may have a tracking function activated by the target signal when responding to visual stimuli. Identifying the motor strategies of each lower limb in response to visual stimuli will not only help identify potential differences between each lower limb but also suggest the possibility of enhancing the role of each lower limb in balance control.
摘要：
■下肢之间运动控制的差异可能会影响运动损伤的风险和康复的恢复。在这项研究中,使用视觉目标跟踪任务评估左下肢和右下肢视觉反馈能力的差异。
■要求34名健康的年轻受试者（年龄20.4±1.2岁）来回移动身体，同时跟踪显示在他们前面的监视器上的视觉目标30秒。两个目标运动是正弦的（即，可预测的模式)和更复杂的(随机的)模式。为了评估下肢跟随视觉目标跟踪的能力，前后CoP(右肢体，CoPap-r；左肢，CoPap-l）和中外侧CoP（右肢，CoPml-r；左肢，CoPml-1）数据使用稳定剂测量。通过视觉反馈能力的跟踪能力被计算为目标信号与左右压力中心的轨迹之间的位移差为梯形区域，并且在整个测量时间内较小的面积总和(SoA)被定义为较大的跟踪能力。
■关于前后CoP中的SoA，正弦和随机任务中的平均SoA在CoP-r数据中明显低于CoP-l数据中，表明右下肢具有更显著的跟随视觉目标跟踪的能力。关于在内侧-外侧方向(CoP)上的SoA,正弦和随机任务中的平均SoA在两条腿之间没有显着差异。
■右下肢在响应视觉刺激时可能具有由目标信号激活的跟踪功能。识别每个下肢响应视觉刺激的运动策略不仅有助于识别每个下肢之间的潜在差异，而且还暗示了增强每个下肢在平衡控制中的作用的可能性。
■要求34名健康的年轻受试者（年龄20.4±1.2岁）来回移动身体，同时跟踪显示在他们前面的监视器上的视觉目标30秒。两个目标运动是正弦的（即，可预测的模式)和更复杂的(随机的)模式。为了评估下肢跟随视觉目标跟踪的能力，前后CoP(右肢体，CoPap-r；左肢，CoPap-l）和中外侧CoP（右肢，CoPml-r；左肢，CoPml-1）数据使用稳定剂测量。通过视觉反馈能力的跟踪能力被计算为目标信号与左右压力中心的轨迹之间的位移差为梯形区域，并且在整个测量时间内较小的面积总和(SoA)被定义为较大的跟踪能力。
■关于前后CoP中的SoA，正弦和随机任务中的平均SoA在CoP-r数据中明显低于CoP-l数据中，表明右下肢具有更显著的跟随视觉目标跟踪的能力。关于在内侧-外侧方向(CoP)上的SoA,正弦和随机任务中的平均SoA在两条腿之间没有显着差异。
■右下肢在响应视觉刺激时可能具有由目标信号激活的跟踪功能。识别每个下肢响应视觉刺激的运动策略不仅有助于识别每个下肢之间的潜在差异，而且还暗示了增强每个下肢在平衡控制中的作用的可能性。
