摘要
本文论述了COVIS的神经生物学基础。COVIS假设类别学习过程中存在着两个系统的竞争,一个是以额叶为基础,依赖工作记忆和执行注意,采用逻辑推理的外显学习系统;另一个是由基底神经节调控,采用程序学习的内隐学习系统。COVIS外显系统的神经生物模型涉及的关键脑结构是前扣带回(ACC)、前额皮层(PFC)和尾状核头部(CD)。模型中有两个独立的分支网络--一个负责在检验过程中将备选规则保持在工作记忆当中,调节注意从一个规则向另一个规则的转换;另一个负责生成或选择新的假设COVIS内隐程序学习系统的关键结构是尾状核,来自黑质(SN),用于调节奖酬信号的多巴胺促进尾状核中的程序学习。
The article discussed COVIS neurobiological basics. COVIS postulates two systems that compete throughout eategory learning - a frontal-based explicit system that uses logical reasoning and depends on working memory and executive attention, and a basal ganglia mediated implicit system that uses procedural learning. The key structures in the model are the anterior cingulate, the prefrontal cortex, and the head of the caudate nucleus. There are two separate sub-networks in this model, one maintaining candidate rules in working memory during the testing process and mediating the switch from one rule to another, and another generating or selecting new candidate hypotheses. The key structure of COVIS programmed learning system is the caudate nucleus, a major input region within the basal ganglia. COVIS assumes that the programmed learning in the caudate is facilitated by a dopamine mediated reward signal from the substantia nigra.
出处
《现代生物医学进展》
CAS
2009年第3期536-539,524,共5页
Progress in Modern Biomedicine
基金
教育部人文社会科学重点基地重大研究项目(06JJKXLX003)
天津市教育科学"十一五"规划课题(ZZG193)
关键词
类别学习
多重系统
神经生物学
Category learning
Multiple Systems
Neurobiological