Neural circuits involved in the recognition of actions performed by nonconspecifics: An fMRI study
Neural circuits involved in the recognition of actions performed by nonconspecifics: An fMRI study
复制标题
DOI：
10.1162/089892904322755601
复制
发表时间：
2004-01-01
影响因子：
3.2
通讯作者：
Rizzolatti, G
中科院分区：
文献类型：
--
作者：
Buccino, G;Lui, F;Rizzolatti, G
功能性磁共振成像被用来评估在观察人类和属于其他物种的个体（猴和狗）的嘴动作期间活跃的皮层区域。两种类型的行动：咬和口头交流行动（讲话阅读，嘴唇，吠叫）。作为对照，显示相同动作的静态图像。观察咬，无论物种的个人执行的行动，确定两个激活灶（一个吻侧和一个尾侧）在下顶叶小叶和激活的额下回和相邻的腹侧运动前皮质的盖部。左喙顶叶焦点（可能BA 40）和左运动前焦点在所有三种情况下都非常相似，而右侧焦点在观察同种动物的行为时更强。观察言语阅读激活了额下回的左侧盖部，观察舔嘴唇激活了双侧盖部的一个小病灶，观察吠叫没有在额叶产生任何激活。观察各种口部动作引起的枕纹外区激活。这些结果表明，其他个体的行为可能通过不同的机制被识别。属于观察者的运动指令集的动作（例如，咬和言语阅读）被映射到观察者的运动系统上。不属于该指令集的动作（例如，树皮）基本上是基于它们的视觉特性来识别的。我们建议，当所观察到的动作的运动表征被激活时，观察者在"个人"的角度获得所观察到的动作的知识，而这种角度是缺乏时，没有运动激活。
Functional magnetic resonance imaging was used to assess the cortical areas active during the observation of mouth actions performed by humans and by individuals belonging to other species (monkey and dog). Two types of actions were presented: biting and oral communicative actions (speech reading, lip-smacking, barking). As a control, static images of the same actions were shown. Observation of biting, regardless of the species of the individual performing the action, determined two activation foci (one rostral and one caudal) in the inferior parietal lobule and an activation of the pars opercularis of the inferior frontal gyrus and the adjacent ventral premotor cortex. The left rostral parietal focus (possibly BA 40) and the left premotor focus were very similar in all three conditions, while the right side foci were stronger during the observation of actions made by conspecifics. The observation of speech reading activated the left pars opercularis of the inferior frontal gyrus, the observation of lip-smacking activated a small focus in the pars opercularis bilaterally, and the observation of barking did not produce any activation in the frontal lobe. Observation of all types of mouth actions induced activation of extrastriate occipital areas. These results suggest that actions made by other individuals may be recognized through different mechanisms. Actions belonging to the motor repertoire of the observer (e.g., biting and speech reading) are mapped on the observer's motor system. Actions that do not belong to this repertoire (e.g., barking) are essentially recognized based on their visual properties. We propose that when the motor representation of the observed action is activated, the observer gains knowledge of the observed action in a "personal" perspective, while this perspective is lacking when there is no motor activation.