Muscular and Prefrontal Cortex Activity during Dual-Task Performing in Young Adults.
Muscular and Prefrontal Cortex Activity during Dual-Task Performing in Young Adults.
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DOI：
10.3390/ejihpe13040055
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发表时间：
2023-03-31
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影响因子：
--
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除了自动加工外，姿势控制还依赖于注意资源。双重任务范式是分析运动任务和/或认知任务之间的干扰和表现的一种可能的方法。各种研究表明，当个体同时执行两个任务时，由于执行任务所需的注意力资源，双任务期间的姿势稳定性可能会比单任务时有所下降。然而，人们对双重任务执行过程中的皮质和肌肉活动模式知之甚少。因此，本研究旨在分析健康青年在双重任务操作下的肌肉和前额叶活动。受试者为34名健康青年(平均年龄±SD=22.74±3.74岁)，分别进行姿势任务(站姿)和双重任务(认知任务时保持站姿)。使用表面肌电信号(SEMG)采集五块肌肉的双侧肢体肌肉活动，并计算选定肌肉对的协同收缩指数(CCI)。用功能性近红外光谱仪(FNIRS)记录氧合和脱氧血红蛋白浓度(前额叶皮质活动)。对单任务和双任务的数据进行了比较。在大多数被分析的肌肉中，从单一任务执行到认知双重任务执行，前额叶活动增加(p<；0.05)，肌肉活动减少(p<；0.05)。在大多数选定的肌肉对中，共收缩指数模式从单一任务条件改变为双重任务条件(p<；0.05)。我们的结论是，在双重任务下，一旦肌肉活动减少，前额叶皮质活动增加，认知任务就会对运动成绩产生负向干扰，这表明年轻人优先考虑认知任务成绩，他们将更多的注意力资源分配给认知任务，而不是运动成绩。了解神经运动的变化有助于采用更好的临床实践来预防伤害。然而，未来的研究建议评估和监测双重任务执行过程中的肌肉和皮质活动，以提供有关执行双重任务时姿势控制中的皮质和肌肉活动模式的更多信息。
Postural control depends on attentional resources besides automatic processes. The dual-task paradigm is a possible approach to analyzing the interference and performance between motor and/or cognitive tasks. Various studies showed that, when individuals simultaneously perform two tasks, the postural stability can decline during a dual-task compared with a single-task due to the attentional resources required performing the tasks. However, little is known about the cortical and muscular activity pattern during dual-task performance. Therefore, this study aims to analyze the muscular and prefrontal activity under dual-task performance in healthy young adults. Thirty-four healthy young adults (mean age ± SD = 22.74 ± 3.74 years) were recruited to perform a postural task (standing posture) and a dual-task (maintaining standing posture while performing a cognitive task). Lower-limb muscle activity was bilaterally collected from five muscles using surface electromyography (sEMG), and the co-contraction index (CCI) was also calculated for selected muscle pairings. The oxy- and deoxyhemoglobin concentrations (prefrontal cortex activity) were recorded using functional near-infrared spectroscopy (fNIRS). Data were compared between single- and dual-task performance. Prefrontal activity increased (p < 0.05), and muscle activity decreased in most analyzed muscles (p < 0.05), from the single-task to cognitive dual-task performing. The co-contraction index patterns changed from single- to dual-task conditions in most selected muscle pairs (p < 0.05). We conclude that the cognitive task negatively interfered with motor performance once the muscle activity decreased and the prefrontal cortex activity increased under a dual-task, suggesting that young adults prioritized cognitive task performance, and they allocated more attentional resources to the cognitive task over the motor performance. Understanding the neuromotor changes can help adopt a better clinical practice to prevent injuries. However, future studies are recommended to assess and monitor muscular and cortical activity during the dual-task performance to provide additional information about the cortical and muscular activity patterns in postural control while performing a dual-task.
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影响因子：
2.6
作者：
Bray, Steven R.;Graham, Jeffrey D.;Hicks, Audrey L.
通讯作者：
Hicks, Audrey L.
影响因子：
2.5
作者：
Hermens, HJ;Freriks, B;Rau, G
通讯作者：
Rau, G
DOI：
10.1073/pnas.95.3.906
发表时间：
1998-02-03
影响因子：
11.1
作者：
Gabrieli, JDE;Poldrack, RA;Desmond, JE
通讯作者：
Desmond, JE
影响因子：
3
作者：
Beurskens, Rainer;Helmich, Ingo;Bock, Otmar
通讯作者：
Bock, Otmar
影响因子：
6.7
作者：
Horak, Fay B.
通讯作者：
Horak, Fay B.