Taylor R A, Marshall P H, Dunlap R D, Gable C D, Sizer P S
Department of Psychology, Texas Tech University, Lubbock 79409-2051, USA.
J Orthop Sports Phys Ther. 1998 Aug;28(2):81-7. doi: 10.2519/jospt.1998.28.2.81.
It is important to establish whether presumed differences among varieties of motor responses are manifested in related differences in performance. In order to determine possible functional distinctions between closed and open kinetic chain tasks, participants' performance in the presence or absence of cognitive distraction on an error-detection task was assessed. Individual testing of participants consisted of knee extension and flexion movements to experimenter-defined positions, approximating the 25th, 50th, and 75th percentile of the participants' range of motion on the apparatus. Performance under conditions of distraction was significantly worse than in the absence of distraction. Performance using longer movements was significantly more accurate. No substantial differences were found between closed and open kinetic chain movements. Limitations of this research for the distinction between open and closed chain tasks are addressed, and clinical implications of the effects of distraction are presented.
确定运动反应的不同种类之间假定的差异是否体现在相关的表现差异中很重要。为了确定闭合和开放动力链任务之间可能存在的功能差异，评估了参与者在有或没有认知干扰的错误检测任务中的表现。对参与者的个体测试包括向实验者定义的位置进行膝关节伸展和屈曲运动，接近参与者在仪器上运动范围的第25、50和75百分位数。分心条件下的表现明显比无分心时更差。使用较长运动时的表现明显更准确。在闭合和开放动力链运动之间未发现实质性差异。讨论了本研究在区分开放和闭合链任务方面的局限性，并阐述了分心影响的临床意义。
