Department of Psychology, University of Konstanz, Konstanz (F.R.G.).
Restor Neurol Neurosci. 1989 Jan 1;1(1):47-63. doi: 10.3233/RNN-1989-1106.
Training-dependent improvement of visual behavior after postgeniculate damage of the visual system was studied in 10 patients. The patients, all with computer-tomographically proven damage and a lesion chronicity of 8 weeks to 4.7 years, were subjected to a special exploration training of at least 10 sessions or 1100 trials. Before and after training, extensive perimetric tests were performed to determine possible training-related visual changes. It was found that the training program improved visual exploration considerably and induced qualitative shifts in exploration strategy even for patients who had failed to adopt these strategies for more than 3 years postlesion. On the other hand, a training-based visual field enlargement was not supported when applying strict criteria. It is concluded that specific and systematic exploration training can be of significant help for improving visuo-spatial behavior in hemianopic patients, but that a reliable visual field enlargement is unlikely to occur in unselected patients trained and examined under standard conditions.
研究了 10 名患者在后发性视觉系统损伤后的视觉行为的训练依赖性改善。所有患者均经计算机断层扫描证实存在损伤，且病变持续时间为 8 周至 4.7 年，他们接受了至少 10 次或 1100 次试验的特殊探索训练。在训练前后，进行了广泛的周边视野测试，以确定可能与训练相关的视觉变化。结果发现，即使对于那些在损伤后 3 年以上未能采用这些策略的患者，训练计划也可以大大改善视觉探索，并诱导探索策略的定性转变。另一方面，当应用严格的标准时，基于训练的视野扩大并不支持。研究结论认为，对于改善偏盲患者的视空间行为，特定的和系统的探索训练可能会有显著帮助，但在标准条件下进行训练和检查的未选择患者中，不太可能出现可靠的视野扩大。
