Seymour S E, Reuter-Lorenz P A, Gazzaniga M S
Department of Psychology, Dartmouth College.
Brain. 1994 Feb;117 ( Pt 1):105-15. doi: 10.1093/brain/117.1.105.
Recent challenges to the traditional view of the disconnection syndrome have been based primarily on evidence of information shared between the hemispheres in commissurotomy patients L.B. and N.G. of the West Coast series. In order to evaluate the generality of these claims, patients J.W., V.P. and D.R. were tested using a series of experiments which replicated and extended some of the experiments carried out in the West Coast series. Using comparisons of numerical identity and value as the model tasks, we found no indication that the separated hemispheres of J.W. or D.R. could share information on any of the tasks they performed. V.P., who has spared callosal fibres and has shown highly specific transfer in previous investigations, performed above chance (60%) in one out of three between field conditions. Together the data fail to support the claims that split-brain patients show evidence of unified cognitive functioning particularly for more abstract, nonperceptual tasks. The data are consistent with the traditional view of the corpus callosum as the primary interhemispheric pathway by which sensory and high-level cognitive integration is achieved.
最近，对传统的分离综合征观点的挑战主要基于西海岸系列连合部切开术患者L.B.和N.G.两半球之间共享信息的证据。为了评估这些说法的普遍性，我们使用一系列实验对患者J.W.、V.P.和D.R.进行了测试，这些实验重复并扩展了在西海岸系列中进行的一些实验。以数字同一性和数值比较作为模型任务，我们没有发现任何迹象表明J.W.或D.R.的分离半球能够在他们执行的任何任务上共享信息。V.P.保留了胼胝体纤维，并且在之前的研究中表现出高度特异性的转移，在三种视野条件中的一种下，其表现高于随机水平（60%）。总体而言，这些数据无法支持裂脑患者表现出统一认知功能的证据这一说法，特别是对于更抽象的、非感知性任务。这些数据与传统观点一致，即胼胝体是实现感觉和高级认知整合的主要半球间通路。
