Sidarus Nura, Vuorre Matti, Haggard Patrick
Institute of Cognitive Neuroscience, University College London, 17 Queen Square, London WC1N 3AZ, UK; Institut Jean Nicod (ENS/EHESS/CNRS), Département d'Etudes Cognitives, Ecole Normale Supérieure - PSL Research University, 29 rue d'Ulm, 75005 Paris, France.
Columbia University, Department of Psychology, 406 Schermerhorn Hall, 1190 Amsterdam Avenue, New York, NY 10027, USA.
Neuroimage. 2017 Apr 15;150:1-13. doi: 10.1016/j.neuroimage.2017.02.015. Epub 2017 Feb 8.
Sense of agency (SoA) refers to the feeling that we are in control of our actions and, through them, of events in the outside world. One influential view claims that the SoA depends on retrospectively matching the expected and actual outcomes of action. However, recent studies have revealed an additional, prospective component to SoA, driven by action selection processes. We used event-related potentials (ERPs) to clarify the neural mechanisms underlying prospective agency. Subliminal priming was used to manipulate the fluency of selecting a left or right hand action in response to a supraliminal target. These actions were followed by one of several coloured circles, after a variable delay. Participants then rated their degree of control over this visual outcome. Incompatible priming impaired action selection, and reduced sense of agency over action outcomes, relative to compatible priming. More negative ERPs immediately after the action, linked to post-decisional action monitoring, were associated with reduced agency ratings over action outcomes. Additionally, feedback-related negativity evoked by the outcome was also associated with reduced agency ratings. These ERP components may reflect brain processes underlying prospective and retrospective components of sense of agency respectively.
能动感（SoA）指的是我们感觉自己能够掌控自身行为，并通过这些行为掌控外部世界事件的感觉。一种有影响力的观点认为，能动感取决于对行动的预期结果和实际结果进行回顾性匹配。然而，最近的研究揭示了由行动选择过程驱动的能动感的另一个前瞻性成分。我们使用事件相关电位（ERP）来阐明前瞻性能动性背后的神经机制。阈下启动用于操纵对阈上目标做出反应时选择左手或右手动作的流畅性。在可变延迟后，这些动作之后会出现几个彩色圆圈之一。然后，参与者对他们对这个视觉结果的控制程度进行评分。与相容启动相比，不相容启动会损害行动选择，并降低对行动结果的能动感。行动后立即出现的与决策后行动监测相关的更负的ERP，与对行动结果的能动性评分降低有关。此外，结果引发的与反馈相关的负波也与能动性评分降低有关。这些ERP成分可能分别反映了能动感的前瞻性和回顾性成分背后的大脑过程。
