Gabbard Carl, Hart Susan
Department of Health and Kinesiology, Texas A&M University, College Station 77843, USA.
J Orthop Sports Phys Ther. 2002 Oct;32(10):525-9. doi: 10.2519/jospt.2002.32.10.525.
A repeated-measures design was used to compare finger-tapping performance (hand functional control) across 4 standing and sitting conditions of limb body support postures.
The intent was to examine the hypothesized hemispheric control interference effects of lower limb body support postures on finger-tapping performance. A secondary objective was to gain a better understanding of the relationship between lower limb posture and concurrent finger-tapping activity.
In a task such as kicking a ball with the right foot, foot control theory suggests that the left hemisphere contralaterally controls right-foot kicking action. However, it can also be interpreted that the postural support (with the left foot in this example) involving the action of antigravity muscles (leg extensors) is driven ipsilaterally. Based on this explanation, we would expect a hemispheric effect to occur during standing on the left limb while performing a finger-tapping task with the right hand. This study has theoretical and clinical significance for understanding hemispheric and functional control of limbs, which may underlie the assessment of movement control and the development and use of therapeutic interventions that can potentially improve functional movement control.
Ninety-eight (98) adult participants (ages 19 to 32 years) performed a finger-tapping task in 4 postural conditions: seated, standing on both feet, standing on the right foot only (RF), and standing on the left foot only (LF).
As predicted, manual performance was significantly slower in the LF condition as compared to the standing and sitting positions. However, when comparing performance between the LF and RF conditions, the difference was minimal.
Although support for the ipsilateral effect was not found, postural position did influence manual performance.
采用重复测量设计，比较在4种站立和坐姿的肢体身体支撑姿势下的手指敲击表现（手部功能控制）。
旨在检验下肢身体支撑姿势对手指敲击表现的假设性半球控制干扰效应。次要目的是更好地理解下肢姿势与同时进行的手指敲击活动之间的关系。
在诸如用右脚踢球的任务中，足部控制理论表明左半球对右侧脚踢球动作进行对侧控制。然而，也可以解释为涉及抗重力肌肉（腿部伸肌）动作的姿势支撑（在此示例中为左脚）是同侧驱动的。基于此解释，我们预计在单腿站立时用右手进行手指敲击任务时会出现半球效应。这项研究对于理解肢体的半球和功能控制具有理论和临床意义，这可能是运动控制评估以及可能改善功能运动控制的治疗干预措施的开发和应用的基础。
98名成年参与者（年龄在19至32岁之间）在4种姿势条件下进行手指敲击任务：坐姿、双脚站立、仅右脚站立（RF）和仅左脚站立（LF）。
正如预测的那样，与站立和坐姿相比，LF条件下的手部表现明显更慢。然而，比较LF和RF条件下的表现时，差异最小。
虽然未发现对同侧效应的支持，但姿势位置确实影响了手部表现。
