Mazaheryazdi Malihah, Moossavi Abdollah, Sarrafzadah Javad, Talebian Saeed, Jalaie Shohreh
Department of Audiology, School of Rehabilitation Sciences, Iran University of Medical Sciences, Iran.
Department of Audiology, Iran University of Medical Sciences, Tehran, Iran.
Int J Pediatr Otorhinolaryngol. 2017 Sep;100:18-22. doi: 10.1016/j.ijporl.2017.06.002. Epub 2017 Jun 16.
The present study aimed to evaluate the postural control perturbations by the center of pressure parameters in two main approaches, cochlear implant turned "on" and "off".
We included 25 children aged 8-10 years with unilateral cochlear implants and bilateral vestibular hypofunction deficit. To evaluate the postural function, each children was asked to stand on the force plate under 3 different conditions and cochlear implant turned "on" and "off": Condition (A) double stance from open eyes to closed eyes, Condition (B) double stance with open eyes engaging in the dual task and Condition (C) From double leg stance to one leg stance with open eyes for assessment of dynamic postural control. Also to calculate the center of pressure parameters, we designed new software for the force plate RESULTS: In condition A: although the results demonstrated an overall reduction in the mean of center of pressure parameters when the cochlear implant was "on", only the significant differences were seen in mean and standard deviations for anterior-posterior displacement, mediolateral displacement, area and mean velocity (P =0.00, P=0.04, P=0.02 and P=0.00, respectively) in open eyes In condition B: no significant difference was found between "on" and "off" cochlear implant in single or dual-task situations. In condition C: mean velocity variable demonstrated a significant difference (P=0.00) in the cochlear implant "on" condition in double leg stance only. Also, anterior-posterior displacement demonestrated a significant difference (P=0.00) when the cochlear implant was turned "on" in one leg stance situation.
The results of our study show that auditory information can improve postural stability and reduce body sways in different situations as an underlying system for reinforcement of the postural control in children without complete normal balance subsystems.
本研究旨在通过压力中心参数，从人工耳蜗“开启”和“关闭”这两种主要方式来评估姿势控制扰动。
我们纳入了25名年龄在8至10岁的单侧人工耳蜗植入且双侧前庭功能减退的儿童。为评估姿势功能，要求每名儿童在人工耳蜗“开启”和“关闭”的3种不同条件下站在测力板上：条件（A）从睁眼到闭眼的双脚站立，条件（B）睁眼进行双重任务的双脚站立，条件（C）从睁眼双腿站立到单腿站立以评估动态姿势控制。此外，为计算压力中心参数，我们为测力板设计了新软件。结果：在条件A中：尽管结果表明人工耳蜗“开启”时压力中心参数的平均值总体降低，但仅在睁眼时前后位移、内外侧位移、面积和平均速度的平均值及标准差方面存在显著差异（分别为P = 0.00、P = 0.04、P = 0.02和P = 0.00）。在条件B中：在单任务或双任务情况下，人工耳蜗“开启”和“关闭”之间未发现显著差异。在条件C中：仅在双腿站立时人工耳蜗“开启”状态下平均速度变量显示出显著差异（P = 0.00）。此外，在单腿站立状态下人工耳蜗“开启”时前后位移也显示出显著差异（P = 0.00）。
我们的研究结果表明，听觉信息可作为一种潜在系统，在不同情况下改善姿势稳定性并减少身体摆动，以增强没有完全正常平衡子系统的儿童的姿势控制。
