Department of Radiology, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada; Child and Adolescent Imaging Research (CAIR) Program, University of Calgary, Calgary, Alberta, Canada; Alberta Children's Hospital Research Institute, University of Calgary, Calgary, Alberta, Canada; Hotchkiss Brain Institute, University of Calgary, Calgary, Alberta, Canada.
Child and Adolescent Imaging Research (CAIR) Program, University of Calgary, Calgary, Alberta, Canada; Alberta Children's Hospital Research Institute, University of Calgary, Calgary, Alberta, Canada; Hotchkiss Brain Institute, University of Calgary, Calgary, Alberta, Canada.
Neuroimage. 2020 Oct 15;220:117130. doi: 10.1016/j.neuroimage.2020.117130. Epub 2020 Jul 2.
Movie-watching is becoming a popular acquisition method to increase compliance and enable neuroimaging data collection in challenging populations such as children, with potential to facilitate studying the somatosensory system. However, relatively little is known about the possible crossmodal (audiovisual) influence of movies on cortical somatosensory processing. In this study, we examined the impact of dynamic audiovisual movies on concurrent cortical somatosensory processing using electroencephalography (EEG). Forty healthy young adults (18-25 years) received passive tactile fingertip stimulation while watching an "entertaining" movie and a novel "low-demand" movie called 'Inscapes' compared to eyes-open rest. Watching a movie did not modulate properties of early or late somatosensory-evoked potentials (SEPs). Similarly, no crossmodal influence on somatosensory adaptation, denoted by a reduction in SEP amplitude with repetitive tactile stimulation, was found. The prominent oscillatory responses in the alpha and beta frequency bands following tactile stimulation differed as a function of viewing condition, with stronger alpha/beta event-related desynchronization (ERD) during movie-watching compared to rest. These findings highlight that movie-watching is a valid acquisition method during which SEPs can be measured in basic research and clinical studies, but that the attentional demands of movies need to be taken into account when performing oscillatory analyses.
观影作为一种提高顺应性的流行获取方法，正被用于帮助儿童等具有挑战性的人群进行神经影像学数据采集，这可能有助于研究躯体感觉系统。然而，对于电影对皮质躯体感觉处理的可能跨模态（视听）影响，人们知之甚少。在这项研究中，我们使用脑电图（EEG）研究了动态视听电影对皮质躯体感觉处理的即时影响。40 名健康的年轻成年人（18-25 岁）在观看“有趣”电影和一种名为“Inscapes”的新型“低需求”电影的同时，接受被动指尖触觉刺激，与睁眼休息进行比较。观看电影并没有调节早期或晚期躯体感觉诱发电位（SEP）的特性。同样，也没有发现跨模态对躯体感觉适应的影响，即重复触觉刺激导致 SEP 幅度减小。触觉刺激后，alpha 和 beta 频带中的突出振荡反应随观看条件而不同，与休息相比，观看电影时的 alpha/beta 事件相关去同步（ERD）更强。这些发现强调了观影是一种有效的获取方法，在此期间可以在基础研究和临床研究中测量 SEP，但在进行振荡分析时需要考虑电影的注意力需求。
