PDF(Pubmed)
Abstract：
Hand visibility affects motor control, perception, and attention, as visual information is integrated into an internal model of somatomotor control. Spontaneous brain activity, i.e., at rest, in the absence of an active task, is correlated among somatomotor regions that are jointly activated during motor tasks. Recent studies suggest that spontaneous activity patterns not only replay task activation patterns but also maintain a model of the body\'s and environment\'s statistical regularities (priors), which may be used to predict upcoming behavior. Here, we test whether spontaneous activity in the human somatomotor cortex as measured using fMRI is modulated by visual stimuli that display hands vs. non-hand stimuli and by the use/action they represent. A multivariate pattern analysis was performed to examine the similarity between spontaneous activity patterns and task-evoked patterns to the presentation of natural hands, robot hands, gloves, or control stimuli (food). In the left somatomotor cortex, we observed a stronger (multivoxel) spatial correlation between resting state activity and natural hand picture patterns compared to other stimuli. No task-rest similarity was found in the visual cortex. Spontaneous activity patterns in somatomotor brain regions code for the visual representation of human hands and their use.
摘要：
手的能见度影响电机控制，感知，和注意,因为视觉信息被整合到躯体运动控制的内部模型中。自发性大脑活动,即，在休息时,在没有积极任务的情况下，在运动任务期间共同激活的躯体运动区域之间相关。最近的研究表明，自发活动模式不仅重放任务激活模式，而且还保持身体和环境的统计规律（先验）的模型，可以用来预测即将发生的行为。这里,我们测试使用功能磁共振成像测量的人类躯体运动皮层的自发活动是否受到显示手的视觉刺激与非手刺激和使用/行动，他们代表。进行了多变量模式分析，以检查自发活动模式和任务诱发模式与自然手的呈现之间的相似性。机器人的手,手套,或控制刺激（食物）。在左侧躯体运动皮层，与其他刺激相比，我们观察到静息状态活动与自然手图模式之间的空间相关性更强（多体素）。在视觉皮层中未发现任务-休息相似性。躯体运动大脑区域中的自发活动模式编码了人手的视觉表示及其使用。
