Kasten E, Wuest S, Sabel B A
Institute of Medical Psychology, Medical Faculty, Otto-von-Guericke University, Magdeburg, Germany.
J Clin Exp Neuropsychol. 1998 Oct;20(5):581-98. doi: 10.1076/jcen.20.5.581.1129.
Using high resolution perimetry in repeated sessions, we investigated 27 patients with homonymous visual field defects in order to detect islands of vision within the damaged area, and to determine color- and form-recognition abilities within these zones of residual vision. In most patients we found circumscribed areas within the "blind" field in which the stimulus was detected in about 50% of presentations. Only one patient had an island of vision greater than 5 degrees within the defective area. We also found an area of variable performance between the blind and the intact field. Borders of field defects were classified as being: (a) sharp (small transition zone), (b) medium, or (c) fuzzy (scattered deficits). We propose that transition zones are functional representations of partially spared neuronal structures in areas of the brain which are only partially injured.
我们在多次重复检查中使用高分辨率视野计，对27例同向性视野缺损患者进行了研究，以检测受损区域内的视力岛，并确定这些残余视力区域内的颜色和形状识别能力。在大多数患者中，我们在“盲”视野内发现了界限分明的区域，在约50%的检查中能检测到刺激。只有1例患者在缺损区域内有一个大于5度的视力岛。我们还发现在盲视野和正常视野之间存在一个表现可变的区域。视野缺损的边界被分类为：(a) 清晰（过渡区小）、(b) 中等或 (c) 模糊（散在性缺损）。我们认为，过渡区是大脑中仅部分受损区域内部分保留的神经元结构的功能表现。
