Understanding the Goals of Everyday Instrumental Actions Is Primarily Linked to Object, Not Motor-Kinematic, Information: Evidence from fMRI
Understanding the Goals of Everyday Instrumental Actions Is Primarily Linked to Object, Not Motor-Kinematic, Information: Evidence from fMRI
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DOI：
10.1371/journal.pone.0169700
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发表时间：
2017-01-12
期刊：
影响因子：
3.7
通讯作者：
Bach, Patric
中科院分区：
文献类型：
--
作者：
Nicholson, Toby;Roser, Matt;Bach, Patric
先前的研究概念化的动作理解主要是作为一个运动学匹配观察到的动作，以自己的运动表征，但忽略了对象信息的作用。目前的研究利用功能磁共振成像来识别（a）参与编码他人动作目标的区域，（B）测试这些目标理解过程是否更强烈地依赖于参与编码物体语义或运动学的区域。参与者观看一系列的工具性动作，同时注意动作的目标（目标任务），执行的动作（动作任务）或使用的对象（对象任务）。结果证实，第一，一个独特的作用，额下回，颞中回和额内侧回的行动目标的理解。第二，他们第一次表明，目标任务中的激活与物体相关的激活直接重叠，而不是与运动相关的激活。此外，随后的参数分析表明，运动相关区域成为激活时，目标是不明确的，或观察者几乎没有行动经验。与动作理解的运动理论相反，这些数据表明，物体而不是运动动力学携带了关于他人动作的关键信息。当目标模糊或不熟悉时，运动学信息也会被招募。
Prior research conceptualised action understanding primarily as a kinematic matching of observed actions to own motor representations but has ignored the role of object information. The current study utilized fMRI to identify (a) regions uniquely involved in encoding the goal of others' actions, and (b) to test whether these goal understanding processes draw more strongly on regions involved in encoding object semantics or movement kinematics. Participants watched sequences of instrumental actions while attending to either the actions' goal (goal task), the movements performed (movement task) or the objects used (object task). The results confirmed, first, a unique role of the inferior frontal gyrus, middle temporal gyrus and medial frontal gyrus in action goal understanding. Second, they show for the first time that activation in the goal task overlaps directly with object-but not movement-related activation. Moreover, subsequent parametric analyses revealed that movement-related regions become activated only when goals are unclear, or observers have little action experience. In contrast to motor theories of action understanding, these data suggest that objects-rather than movement kinematics-carry the key information about others' actions. Kinematic information is additionally recruited when goals are ambiguous or unfamiliar.