SUPPLEMENTARY MOTOR AREA STRUCTURE AND FUNCTION - REVIEW AND HYPOTHESES
SUPPLEMENTARY MOTOR AREA STRUCTURE AND FUNCTION - REVIEW AND HYPOTHESES
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DOI：
10.1017/s0140525x00045167
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发表时间：
1985-12-01
影响因子：
29.3
通讯作者：
GOLDBERG, G
中科院分区：
文献类型：
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作者：
GOLDBERG, G
虽然它的存在已经知道了30多年，但直到最近，补充运动区（SMA）及其在运动皮层组织中的作用才被神经科学家详细研究。从各种各样的调查角度的证据进行审查，试图综合理解SMA功能的概念框架。这表明，SMA有一个重要的作用，发挥有意的过程中，内部环境的影响制定的行动。它可以被看作是遗传上较老的运动皮层，来源于前扣带周围皮质边缘皮层，作为内侧前运动系统的关键部分，它在“编程”和流畅执行扩展动作序列中至关重要，这些动作序列是“投射”的，因为它们依赖于基于模型的预测。这个内侧系统可以与外侧前运动系统区分开来，外侧前运动系统被认为是从不同的神经源进化而来的。内侧前运动系统的解剖生理模型，提出了体现的原则，选择这些神经成分的过程中，成为积极的与一个特定的行动的性能。假设的动态行动，这个模型中的微观离散行动概述。它的结论是，虽然有很多要了解的SMA，目前的证据可以确定的收敛。这些证据表明，SMA通过其在内侧边缘皮层和初级运动皮层之间的中介作用，在行为意图的发展以及行为的规范和阐述中起着重要作用。
Though its existence has been known for well over 30 years, only recently has the supplementary motor area (SMA) and its role in the cortical organization of movement come to be examined in detail by neuroscientists. Evidence from a wide variety of investigational perspectives is reviewed in an attempt to synthesize a conceptual framework for understanding SMA function. It is suggested that the SMA has an important role to play in the intentional process whereby internal context influences the elaboration of action. It may be viewed as phylogenetically older motor cortex, derived from anterior cingulate periarchicortical limbic cortex, which, as a key part of a medial premotor system, is crucial in the “programming” and fluent execution of extended action sequences which are “projectional” in that they rely on model-based prediction. This medial system can be distinguished from a lateral premotor system postulated to have evolved over phylogeny from a different neural source. An anatomico-physiologic model of the medial premotor system is proposed which embodies the principles of cyclicity and reentrance in the process of selecting those neural components to become active in conjunction with the performance of a particular action. The postulated dynamic action of this model in the microgenesis of a discrete action is outlined. It is concluded that although there is a great deal to be learned about the SMA, a convergence of current evidence can be identified. Such evidence suggests that the SMA plays an important role in the development of the intention-to-act and the specification and elaboration of action through its mediation between medial limbic cortex and primary motor cortex.