Hwang Ji Hye, Lee Chang-Hyung, Chang Hyun Jung, Park Dae-Sung
Department of Physical Medicine and Rehabilitation, Center for Clinical Research, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
Ann Rehabil Med. 2013 Jun;37(3):347-54. doi: 10.5535/arm.2013.37.3.347. Epub 2013 Jun 30.
To investigate the postural control factors influencing the automatic (reflex-controlled) and attentional (high cortical) factors on dual task.
We used a dual task model to examine the attentional factors affecting the control of posture, subjecting test subjects to vibration stimulation, one-leg standing and verbal or nonverbal task trials. Twenty-three young, healthy participants were asked to stand on force plates and their centers of pressure were measured during dual task trials. We acquired 15 seconds of data for each volunteer during six dual task trials involving varying task combinations.
We observed significantly different sway patterns between the early and late phases of dual task trials, which probably reflect the attentional demands. Vibration stimulation perturbed sway more during the early than the late phases; with or without vibration stimulation, the addition of secondary tasks decreased sway in all phases, and greater decreases in sway were observed in the late phases, when subjects were assigned nonverbal tasks. Less sway was observed during the nonverbal task in a sequential study.
The attentional and automatic factors were analyzed during a sequential study. By controlling the postural control factors, optimal parameters and training methods might be used in clinical applications.
研究影响双重任务中自动（反射控制）和注意力（高级皮层）因素的姿势控制因素。
我们使用双重任务模型来检查影响姿势控制的注意力因素，让测试对象接受振动刺激、单腿站立以及言语或非言语任务试验。23名年轻健康的参与者被要求站在测力板上，在双重任务试验期间测量他们的压力中心。在涉及不同任务组合的六项双重任务试验中，我们为每位志愿者采集了15秒的数据。
我们观察到双重任务试验的早期和晚期阶段之间的摇摆模式存在显著差异，这可能反映了注意力需求。振动刺激在早期比晚期更能干扰摇摆；无论有无振动刺激，次要任务的添加在所有阶段都减少了摇摆，并且在晚期阶段，当给受试者分配非言语任务时，观察到摇摆的更大减少。在一项顺序研究中，非言语任务期间观察到的摇摆较少。
在一项顺序研究中分析了注意力和自动因素。通过控制姿势控制因素，最佳参数和训练方法可用于临床应用。
