Dynamical basis of intentions and expectations in a simple neuronal network
Dynamical basis of intentions and expectations in a simple neuronal network
复制标题
DOI：
10.1073/pnas.0402002101
复制
发表时间：
2004-06-22
影响因子：
11.1
通讯作者：
Weiss, KR
中科院分区：
文献类型：
--
作者：
Proekt, A;Brezina, V;Weiss, KR
对外部刺激的行为反应的选择受到内部状态（例如意图和期望）的强烈影响。这些内部状态通常归因于高阶大脑功能。然而，我们在这里表明，即使在海兔的简单喂养网络中，外部刺激也不能直接指定表达哪种运动输出；相反，电机输出由刺激时刻的网络状态指定。这种网络状态的历史依赖性的表现方式与高等动物行为中的意图和期望相同。值得注意的是，我们发现网络本身（而不是某些高阶网络）突触的活动依赖性可塑性介导了网络状态变化的一个重要方面。通过这种机制，网络状态的变化成为行为生成的自动结果。总而言之，我们的研究结果表明，行为生成网络本身可能会从生成行为的过程的可塑性中出现意图和期望。
Selection of behavioral responses to external stimuli is strongly influenced by internal states, such as intentions and expectations. These internal states are often attributed to higher-order brain functions. Yet here we show that even in the simple feeding network of Aplysia, external stimuli do not directly specify which motor output is expressed; instead, the motor output is specified by the state of the network at the moment of stimulation. The history-dependence of this network state manifests itself in the same way as do intentions and expectations in the behavior of higher animals. Remarkably, we find that activity-dependent plasticity of a synapse within the network itself, rather than some higher-order network, mediates one important aspect of the change in the network state. Through this mechanism, changes in the network state become an automatic consequence of the generation of behavior. Altogether, our findings suggest that intentions and expectations may emerge within behavior-generating networks themselves from the plasticity of the very processes that generate the behavior.