A computational model of action selection in the basal ganglia. II. Analysis and simulation of behaviour
A computational model of action selection in the basal ganglia. II. Analysis and simulation of behaviour
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DOI：
10.1007/pl00007985
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发表时间：
2001-06-01
影响因子：
1.9
通讯作者：
Redgrave, P
中科院分区：
文献类型：
--
作者：
Gurney, K;Prescott, TJ;Redgrave, P
在另一篇论文中，基于这些大脑结构在行为行为选择中起核心作用的前提，提出了一种新的基底神经节功能结构。本文通过分析和仿真，定量地描述了该模型的特性。基底神经节分解为选择通路和控制通路的理论有几个方面的支持。首先，揭示了几个优雅的特征——容量缩放、增强的选择性和协同多巴胺调节——这些可能存在于设计良好的动作选择机制中。这些特征的发现也为支撑我们模型的选择的计算前提提供了支持。其次，发现模型苍白球外段输出与苍白球内段及网状黑质区输出与神经生理数据吻合良好，表明模型与生物基底神经节具有共同的结构特征。第三，模型作为信号选择机制的行为与在不同水平多巴胺能调节下观察到的动物的某些行为选择相似。
In a companion paper a new functional architecture was proposed for the basal ganglia based on the premise that these brain structures play a central role in behavioural action selection. The current paper quantitatively describes the properties of the model using analysis and simulation. The decomposition of the basal ganglia into selection and control pathways is supported in several ways. First, several elegant features are exposed - capacity scaling, enhanced selectivity and synergistic dopamine modulation - which might be expected to exist in a well designed action selection mechanism. The discovery of these features also lends support to the computational premise of selection that underpins our model. Second, good matches between model globus pallidus external segment output and globus pallidus internal segment and substantia nigra reticulata area output, and neurophysiological data, have been found which are indicative of common architectural features in the model and biological basal ganglia. Third, the behaviour of the model as a signal selection mechanism has parallels with some kinds of action selection observed in animals under various levels of dopaminergic modulation.