Seeing what you feel behind: neuronal correlates of seeing painful stimulation.

最常见的慢性疼痛之一是背痛。到目前为止，我们还不知道在这个部位看到自己的背部对疼痛感知的影响。以前，我们在斜方肌上实施了背部疼痛压力刺激的在线视频反馈。与手部的反馈相比，背部的视觉反馈降低了患者和对照组的感知疼痛强度。然而，看到自己的背部所引起的疼痛减轻背后的椎骨上机制目前尚不清楚。因此，我们将使用功能磁共振成像（fMRI）来测量20名健康对照（HC）在背部疼痛电刺激期间的大脑激活情况，同时受试者接受视觉反馈：a)手背，b)施加刺激的背部部位，c)第三个人的背部。在测量过程中，参与者将评估疼痛强度。

One of the most common forms of chronic pain is back pain. Until now nothing is known about the influence of seeing one¿s own back on pain perception at this site. Previously we implemented online video feedback of the back during painful pressure stimuli over the trapezius muscle. Visual feedback of the back reduced perceived pain intensity compared to feedback of the hand in both patients and controls. However, the supraspinal mechanism behind pain reduction induced by seeing one¿s own back is currently unknown. Therefore, we will use functional magnetic resonance imaging (fMRI) to measure brain activation in 20 healthy controls (HC) during painful electrical stimuli of the back while subjects receive visual feedback of a) the dorsum of the hand, b) the site on the back were the stimuli are applied and c) a third persons back. Participants will rate pain intensity during the measurement.