Distinct cortical correlates of perception and motor function in balance control.
Distinct cortical correlates of perception and motor function in balance control.
复制标题
平衡控制中感知和运动功能的独特皮质关联。
DOI：
10.1101/2023.08.22.554282
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发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Borich,MichaelR
中科院分区：
文献类型：
--
作者：
Mirdamadi,JasmineL;Ting,LenaH;Borich,MichaelR
大脑活动的波动会改变我们对身体的感知和产生动作的方式，但尚未在功能性全身行为中进行研究。在反应性平衡中，我们最近发现，诱发的大脑活动与年轻人的平衡能力有关。此外，在PD中，反应性平衡中的全身运动感知受损与平衡受损相关。本文研究了青年人（9名女性，10名男性）在反应平衡中进行全身运动知觉时的脑活动。我们假设，正在进行的和诱发的皮层活动影响信息处理的效率，成功的感知和运动过程中的全身行为。我们使用定位于SMA的脑电图表征了两种皮层信号：（1）“N1”，一种扰动诱发电位，其振幅随着预期而降低，并且在平衡功能较低的个体中更大;（2）扰动前β功率，一种有利于维持当前感觉运动状态的短暂节律，与触觉感知呈负相关。在一个两种选择的强迫选择任务，参与者判断是否对后向支撑面扰动站立期间是在“相同”或“不同”的方向。正如预期的那样，较低的全身感知与较低的平衡能力有关。在一个扰动对，N1衰减较大的正确感知的试验和更好的平衡，但不是感知。相比之下，扰动前β功率在错误感知的试验中较高，并且与较差的感知相关，但与平衡无关。总之，持续的和诱发的皮层活动在信息处理中具有独特的作用，这些作用与感知和平衡能力产生了不同的联系。
Fluctuations in brain activity alter how we perceive our body and generate movements but have not been investigated in functional whole-body behaviors. During reactive balance, we recently showed that evoked brain activity is associated with the balance ability in young individuals. Furthermore, in PD, impaired whole-body motion perception in reactive balance is associated with impaired balance. Here, we investigated the brain activity during the whole-body motion perception in reactive balance in young adults (9 female, 10 male). We hypothesized that both ongoing and evoked cortical activity influences the efficiency of information processing for successful perception and movement during whole-body behaviors. We characterized two cortical signals using electroencephalography localized to the SMA: (1) the “N1,” a perturbation-evoked potential that decreases in amplitude with expectancy and is larger in individuals with lower balance function, and (2) preperturbation β power, a transient rhythm that favors maintenance of the current sensorimotor state and is inversely associated with tactile perception. In a two-alternative forced choice task, participants judged whether pairs of backward support surface perturbations during standing were in the “same” or “different” direction. As expected, lower whole-body perception was associated with lower balance ability. Within a perturbation pair, N1 attenuation was larger on correctly perceived trials and associated with better balance, but not perception. In contrast, preperturbation β power was higher on incorrectly perceived trials and associated with poorer perception, but not balance. Together, ongoing and evoked cortical activity have unique roles in information processing that give rise to distinct associations with perceptual and balance ability.
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影响因子：
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