Proprioceptive signals contribute to the sense of body ownership
Proprioceptive signals contribute to the sense of body ownership
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DOI：
10.1113/jphysiol.2011.204941
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发表时间：
2011-06-15
影响因子：
5.5
通讯作者：
Gandevia, Simon C.
中科院分区：
文献类型：
--
作者：
Walsh, Lee D.;Moseley, G. Lorimer;Gandevia, Simon C.
身体所有权的感觉，我们身体的部分“属于”我们的知识，大概是使用感官信息发展起来的。皮肤信号似乎是理想的，可以改变所有权的感觉。例如，可以通过同步地抚摸受试者隐藏的手和可见的人造手来诱导对人造橡胶手的所有权的错觉。与皮肤信号一样，本体感受信号（e. G.来自肌肉感受器）专门发出身体中发生的事件的信号，但本体感受器对身体所有权感的影响尚不清楚。我们开发了一种技术，使用近端指间关节的运动作为刺激，在人造塑料手指上产生所有权的错觉。然后，我们研究了这种错觉在20名受试者时，他们的食指是完整的，当皮肤和关节传入的手指已被局部麻醉的数字神经。当数字神经被阻断时，受试者仍然会在塑料手指上经历一种由运动引起的所有权错觉。这表明，局部皮肤信号对错觉并不是必不可少的，而来自近端的输入，可能来自移动手指的肌肉中的受体，可以影响身体所有权的感觉。与其他研究相反，我们没有发现任何证据表明自愿运动比被动运动引起更强的身体所有权错觉。似乎感觉刺激的一致性比多种感觉信号的存在更重要。
The sense of body ownership, knowledge that parts of our body 'belong' to us, is presumably developed using sensory information. Cutaneous signals seem ideal for this and can modify the sense of ownership. For example, an illusion of ownership over an artificial rubber hand can be induced by synchronously stroking both the subject's hidden hand and a visible artificial hand. Like cutaneous signals, proprioceptive signals (e. g. from muscle receptors) exclusively signal events occurring in the body, but the influence of proprioceptors on the sense of body ownership is not known. We developed a technique to generate an illusion of ownership over an artificial plastic finger, using movement at the proximal interphalangeal joint as the stimulus. We then examined this illusion in 20 subjects when their index finger was intact and when the cutaneous and joint afferents from the finger had been blocked by local anaesthesia of the digital nerves. Subjects still experienced an illusion of ownership, induced by movement, over the plastic finger when the digital nerves were blocked. This shows that local cutaneous signals are not essential for the illusion and that inputs arising proximally, presumably from receptors in muscles which move the finger, can influence the sense of body ownership. Contrary to other studies, we found no evidence that voluntary movements induce stronger illusions of body ownership than those induced by passive movement. It seems that the congruence of sensory stimuli is more important to establish body ownership than the presence of multiple sensory signals.