Corticospinal facilitation during first and third person imagery
Corticospinal facilitation during first and third person imagery
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DOI：
10.1007/s00221-005-0076-0
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发表时间：
2006-01-01
影响因子：
2
通讯作者：
Aglioti, SM
中科院分区：
文献类型：
--
作者：
Fourkas, AD;Avenanti, A;Aglioti, SM
运动想象可以定义为运动的秘密排练。先前的经颅磁刺激（TMS）研究表明，运动想象增加了初级运动皮层的皮质脊髓兴奋性，该区域对应于想象运动中涉及的肌肉的表现。然而，这项研究仅限于自己运动中的图像。我们通过对比食指外展-内收运动的第一人称图像和第三人称图像来扩展 TMS 研究。在单脉冲 TMS 过程中记录第一背侧骨间肌 (FDI) 和小指展肌 (ADM) 的运动诱发电位。参与者进行第一人称和第三人称运动想象、视觉想象和静态想象。视觉图像涉及非生物运动，而静态图像涉及不动的手的第一人称视角。相对于静态图像，FDI 中想象的运动的兴奋性有所增加，但 ADM 中则没有。第一人称图像的便利补充了之前的发现。在第三人称图像中发现外国直接投资记录的欧洲议会议员的更大便利，其中该行为明显归因于另一个人。我们在观察到的动作和想象中的自我动作观察的背景下解释了这一新颖的结果，并将结果归因于镜像系统的激活，用于将想象中的动作与内部视觉运动模板相匹配。
Motor imagery can be defined as the covert rehearsal of movement. Previous research with transcranial magnetic stimulation (TMS) has demonstrated that motor imagery increases the corticospinal excitability of the primary motor cortex in the area corresponding to the representation of the muscle involved in the imagined movement. This research, however, has been limited to imagery of oneself in motion. We extend the TMS research by contrasting first person imagery and third person imagery of index finger abduction-adduction movements. Motor evoked potentials were recorded from first dorsal interosseous (FDI) and abductor digiti minimi (ADM) during single pulse TMS. Participants performed first and third person motor imagery, visual imagery, and static imagery. Visual imagery involved non biological motion while static imagery involved a first person perspective of the unmoving hand. Relative to static imagery, excitability during imagined movement increased in FDI but not ADM. The facilitation in first person imagery adds to previous findings. A greater facilitation of MEPs recorded from FDI was found in third person imagery where the action was clearly attributable to another person. We interpret this novel result in the context of observed action and imagined observation of self action, and attribute the result to activation of mirror systems for matching the imagined action with an inner visuo-motor template.