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首页> 外文期刊>Progress in brain research >Posterior cingulate, precuneal and retrosplenial cortices: cytology and components of the neural network correlates of consciousness.
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Posterior cingulate, precuneal and retrosplenial cortices: cytology and components of the neural network correlates of consciousness.

机译：后扣带回，椎前和脾后皮质：细胞学和神经网络的组成与意识相关。

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摘要

Neuronal aggregates involved in conscious awareness are not evenly distributed throughout the CNS but comprise key components referred to as the neural network correlates of consciousness (NNCC). A critical node in this network is the posterior cingulate, precuneal, and retrosplenial cortices. The cytological and neurochemical composition of this region is reviewed in relation to the Brodmann map. This region has the highest level of cortical glucose metabolism and cytochrome c oxidase activity. Monkey studies suggest that the anterior thalamic projection likely drives retrosplenial and posterior cingulate cortex metabolism and that the midbrain projection to the anteroventral thalamic nucleus is a key coupling site between the brainstem system for arousal and cortical systems for cognitive processing and awareness. The pivotal role of the posterior cingulate, precuneal, and retrosplenial cortices in consciousness is demonstrated with posterior cingulate epilepsy cases, midcingulate lesions that de-afferent this region and are associated with unilateral sensory neglect, observations from stroke and vegetative state patients, alterations in blood flow during sleep, and the actions of general anesthetics. Since this region is critically involved in self reflection, it is not surprising that it is similarly a site for the NNCC. Interestingly, information processing during complex cognitive tasks and during aversive sensations such as pain induces efforts to terminate self reflection and result in decreased processing in posterior cingulate and precuneal cortices.
机译：意识意识中涉及的神经元聚集体未在整个中枢神经系统中平均分布，而是包含被称为意识神经网络关联（NNCC）的关键成分。该网络中的关键节点是扣带后，皮质和脾后皮质。该区域的细胞学和神经化学组成与Brodmann图有关。该区域具有最高水平的皮质葡萄糖代谢和细胞色素C氧化酶活性。猴子的研究表明，丘脑前部投射可能驱动脾后和扣带回皮质的代谢，中脑投射至丘脑前腹核是觉醒的脑干系统与认知系统和认知系统之间的关键耦合部位。后扣带状癫痫病例，使该区域失去作用并与单侧感觉疏忽相关的中扣带状皮损，中风和营养状态患者的观察结果，血液中的改变，后扣带状皮层，枢纽和脾后皮质在意识中的关键作用得到了证明。睡眠期间的血液流动以及全身麻醉药的作用。由于该区域严重参与自我反思，因此它同样是NNCC的所在地也就不足为奇了。有趣的是，在复杂的认知任务和厌恶感（例如疼痛）过程中的信息处理会导致终止自我反射的努力，并导致扣带后和皮质前皮质的处理减少。

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