Mental imagery in the navigation domain: a computational model of sensory-motor simulation mechanisms
Mental imagery in the navigation domain: a computational model of sensory-motor simulation mechanisms
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DOI：
10.1177/1059712313488789
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发表时间：
2013-08-01
影响因子：
1.6
通讯作者：
Pezzulo, Giovanni
中科院分区：
文献类型：
--
作者：
Chersi, Fabian;Donnarumma, Francesco;Pezzulo, Giovanni
最近的实验证据表明，动物可以使用心理模拟来决定在目标导向导航过程中要采取的行动。在此过程中被发现活跃的主要大脑区域是海马体、腹侧纹状体和感觉运动皮层。在本文中，我们提出了一个计算模型，其中包括该电路的生物学方面，并从机械上解释了如何使用它来想象和评估未来事件。其最显着的特征是，动作选择是通过使用与公开执行期间活跃的相同大脑区域来模拟动作及其感官效果来做出的。更准确地说，动作（例如行走）的模拟创建了一种新的感官模式，该模式的评估方式与真实输入相同。该模型在导航任务中得到验证，其中模拟大鼠被放置在复杂的迷宫中。我们证明海马和纹状体细胞被激活来模拟路径、检索其估计值并做出决策。我们将这些结果与一个通用框架联系起来，该框架将大脑视为一种预测装置，可以使用情景记忆、运动和视觉图像等机制将自己从当前感知的此时此地分离出来。
Recent experimental evidence indicates that animals can use mental simulation to make decisions about the actions to take during goal-directed navigation. The principal brain areas found to be active during this process are the hippocampus, the ventral striatum and the sensory-motor cortex. In this paper, we present a computational model that includes biological aspects of this circuit and explains mechanistically how it may be used to imagine and evaluate future events. Its most salient characteristic is that choices about actions are made by simulating movements and their sensory effects using the same brain areas that are active during overt execution. More precisely, the simulation of an action (e.g., walking) creates a new sensory pattern that is evaluated in the same way as real inputs. The model is validated in a navigation task in which a simulated rat is placed in a complex maze. We show that hippocampal and striatal cells are activated to simulate paths, to retrieve their estimated value and to make decisions. We link these results with a general framework that sees the brain as a predictive device that can detach' itself from the here-and-now of current perception using mechanisms such as episodic memories, motor and visual imagery.