Department of Psychology, Nanjing University, Nanjing 210023, China.
National Key Laboratory of Human Factors Engineering, China Astronauts Research and Training Center, Beijing 100094, China.
Neuroimage. 2024 Sep;298:120788. doi: 10.1016/j.neuroimage.2024.120788. Epub 2024 Aug 13.
The accomplishment of interpersonal sensorimotor synchronization is a challenging endeavor because it requires the achievement of a balance between accurate temporal control within individuals and smooth communication between them. This raises a critical question: How does the brain comprehend and process the perceptual information of others to guarantee accurate temporal control of action goals in a social context? A joint synchronization - continuation tapping task was conducted together with varying relative phases (0°/180°) and intervals of tempos (400 ms/800 ms/1600 ms) while neural data was collected using fNIRS (functional near-infrared spectroscopy). Individuals showed better behavioral performance and greater interpersonal brain synchronization(IBS) in the left dorsolateral prefrontal cortex at alternated condition (180° relative phase) compared to symmetric condition (0° relative phase), suggesting that the individual can better maintain behavioral performance and show improved IBS when the partner taps between the individual's gaps. Meanwhile, in most levels of alternated condition, IBS is inversely proportional to interference from partner, implying the counteraction of IBS against interference from others. In addition, when the interval of tempo was 1600 ms, behavioral performance showed a sharp decline, accompanied by a decrease in IBS, reflecting that IBS in SMS reflects effective information exchange between individuals rather than ineffective interference with each other. This study provides insight into the mechanisms underlying sensorimotor synchronization between individuals.
人际传感器运动同步的实现是一项具有挑战性的任务，因为它需要在个体内部实现精确的时间控制，并在他们之间实现顺畅的沟通。这就提出了一个关键问题：大脑如何理解和处理他人的感知信息，以确保在社交环境中准确控制动作目标的时间？通过使用功能性近红外光谱技术（fNIRS）收集神经数据，同时进行了联合同步-延续敲击任务，并改变了相对相位（0°/180°）和时间间隔（400 ms/800 ms/1600 ms）。与对称条件（0°相对相位）相比，个体在交替条件（180°相对相位）下表现出更好的行为表现和更大的人际脑同步（IBS），在左背外侧前额叶皮层中，这表明当伙伴在个体的间隙之间敲击时，个体可以更好地保持行为表现并显示出改善的 IBS。同时，在大多数交替条件下，IBS 与来自伙伴的干扰成反比，这意味着 IBS 对来自他人的干扰具有对抗作用。此外，当时间间隔为 1600 ms 时，行为表现急剧下降，同时 IBS 下降，这表明 SMS 中的 IBS 反映了个体之间有效的信息交换，而不是彼此之间无效的干扰。本研究为理解个体之间传感器运动同步的机制提供了深入的见解。
