Price Cathy J., Friston Karl J.
Wellcome Dept of Imaging Neuroscience, Institute of Neurology, Queen Square, WC1N 3BG, London, UK
Trends Cogn Sci. 2002 Oct 1;6(10):416-421. doi: 10.1016/s1364-6613(02)01976-9.
Cognitive models indicate that there are multiple ways of completing the same task. This implicit degeneracy cannot be revealed by functional imaging studies of normal subjects if more than one of the sufficient neural systems is activated. Nor can it be detected by neuropsychological studies of patients because their performance might not be impaired when only one degenerate system is damaged. We propose that degenerate sets of sufficient neural systems can only be identified by an iterative approach that integrates the lesion-deficit model and functional imaging studies of normal and neurologically damaged subjects.
认知模型表明，完成同一任务存在多种方式。如果多个足够的神经系统被激活，正常受试者的功能成像研究就无法揭示这种隐含的简并性。对患者进行的神经心理学研究也无法检测到它，因为当只有一个简并系统受损时，他们的表现可能不会受到损害。我们提出，只有通过一种迭代方法才能识别足够的神经系统的简并集，该方法整合了损伤-缺陷模型以及对正常和神经受损受试者的功能成像研究。
