■本研究旨在利用功能性近红外光谱技术(fNIRS)探索运动训练模式对感觉和运动相关皮层兴奋性的影响,并揭示特定的皮层效应。
20名没有已知健康状况的参与者参加了一项涉及被动研究,活跃,和由上肢机器人促进的阻力任务,使用块设计。参与者在整个实验过程中都佩戴了功能性近红外光谱(fNIRS)设备,以监测任务期间皮质血氧水平的变化。fNIRS光覆盖主要针对大脑皮层的关键区域,包括初级运动皮层(M1),初级体感皮层(S1),辅助电机区域(SMA),和两个半球的运动前皮层(PMC)。这项研究评估了皮质激活区域,强度,和横向化价值。
■被动运动主要激活M1和部分S1,而主动运动主要激活对侧M1和S1。阻力训练激活两个半球的大脑区域,包括对侧M1,S1,SMA,和PMC,以及同侧M1,S1,SMA,和PMC。阻力运动也激活同侧感觉运动皮层(S1,SMA,PMC)比主动或被动运动更多。与被动运动相比,主动运动在M1中具有更高的对侧激活。抵抗和主动运动比被动运动更能增加大脑活动。不同的运动在两侧平等地激活不同的皮质区域,但是偏侧化不同。在三种运动模式中,右脑区域的偏侧化之间的相关性在右皮质中很重要,而在左皮质中却没有。
■所有类型的运动都能提高运动皮层的兴奋性,但是阻力运动更广泛地激活了运动皮层的两侧。PMC对于激烈的锻炼至关重要。右皮质在运动任务中表现出比左皮质更好的协调性。fNIRS的发现可以帮助确定治疗疗程的长度。
UNASSIGNED: This study aimed to explore the impact of exercise training modes on sensory and motor-related
cortex excitability using functional near-infrared spectroscopy technology (fNIRS) and reveal specific cortical effects.
UNASSIGNED: Twenty participants with no known health conditions took part in a study involving passive, active, and resistance tasks facilitated by an upper-limb robot, using a block design. The participants wore functional near-infrared spectroscopy (fNIRS) devices throughout the experiment to monitor changes in cortical blood oxygen levels during the tasks. The fNIRS optode coverage primarily targeted key areas of the brain
cortex, including the primary motor
cortex (M1), primary somatosensory
cortex (S1), supplementary motor area (SMA), and premotor
cortex (PMC) on both hemispheres. The study evaluated cortical activation areas, intensity, and lateralization values.
UNASSIGNED: Passive movement primarily activates M1 and part of S1, while active movement mainly activates contralateral M1 and S1. Resistance training activates brain regions in both hemispheres, including contralateral M1, S1, SMA, and PMC, as well as ipsilateral M1, S1, SMA, and PMC. Resistance movement also activates the ipsilateral sensorimotor cortex (S1, SMA, PMC) more than active or passive movement. Active movement has higher contralateral activation in M1 compared to passive movement. Resistance and active movements increase brain activity more than passive movement. Different movements activate various cortical areas equally on both sides, but lateralization differs. The correlation between lateralization of brain regions is significant in the right cortex but not in the left
cortex during three movement patterns.
UNASSIGNED: All types of exercise boost motor cortex excitability, but resistance exercise activates both sides of the motor
cortex more extensively. The PMC is crucial for intense workouts. The right cortex shows better coordination during motor tasks than the left. fNIRS findings can help determine the length of treatment sessions.