The emergence of the capacity to name left visual field stimuli in a callosotomy patient: implications for functional plasticity.
The emergence of the capacity to name left visual field stimuli in a callosotomy patient: implications for functional plasticity.
复制标题
胼胝体切开患者命名左视野刺激的能力的出现：对功能可塑性的影响。
DOI：
10.1016/0028-3932(95)00039-6
复制
发表时间：
1995
期刊：
影响因子：
2.6
通讯作者：
Gazzaniga,MS
中科院分区：
文献类型：
--
作者：
Baynes,K;Wessinger,CM;Fendrich,R;Gazzaniga,MS
胼胝体切开术患者J.W.有一个良好的记录的历史，右半球的语言能力，包括听觉和视觉词汇语义系统有限的语音和句法。然而，J.W.以前没有表现出命名呈现给左视野（LVF）的刺激的能力。我们报告了这种能力的出现。进行了实验，其中图片和文字呈现给受试者的LVF使用视网膜稳定技术，以确保偏侧化。J.W.能够正确地命名大约四分之一的这些刺激在各种各样的演示条件下。新开发的对复杂LVF刺激做出口头反应的能力可能是（1）通过皮层下通路增强的半球间信息传递，（2）复杂的交叉提示策略，或（3）右半球对运动言语的控制的结果。虽然前两种机制似乎对J.W.的LVF命名性能，准确性不可预测的刺激集和错误模式需要承认，控制运动语言现在是右半球。
Callosotomized patient J.W. has a well-documented history of right hemisphere language abilities, including an auditory and visual lexical-semantic system with limited phonology and syntax. However, J.W. has not previously exhibited the ability to name stimuli presented to the left visual field (LVF). We report the emergence of this ability. Experiments were conducted in which pictures and text were presented to the subject's LVF using retinal stabilization techniques to ensure lateralization. J.W. was able to correctly name approximately one-quarter of these stimuli under a variety of presentation conditions. The newly developed ability to respond verbally to complex LVF stimuli can be the result of (1) enhanced inter-hemispheric transfer of information via sub-cortical pathways, (2) sophisticated cross cueing strategies, or (3) control of motor speech in the right hemisphere. Although it appears that the first two mechanisms make a contribution to J.W.'s LVF naming performance, accuracy for unpredictable stimulus sets and the error patterns require acknowledgement that control of motor speech is now available to the right hemisphere.