Wong C W, Chen T Y, Liao J J, You D L
Department of Surgery, Chang Gung Memorial Hospital, Taipei, Taiwan, Republic of China.
Acta Neurochir (Wien). 1993;120(3-4):187-9. doi: 10.1007/BF02112040.
Normal regional blood flow was documented by Single Photon Emission Computed Tomograms 5 and 20 hours before the full recovery of cortical blindness in two patients, lending itself to the possibility of being a prognostic factor. Rubbing of the posterior cerebral arteries against the tentorial edges during trauma instead of traction was believed to cause blindness in one patient and embolization due to hammering bone grafts home during cervical spinal fusion, in the other. Pattern reversal visual evoked responses (PRVERs) were absent during blindness; upon recovery P 100 with full amplitude and normal latency appeared despite the presence of tunnel vision. These are consistent with the fact that the central 8-10 degrees of visual field represented in the posterior occipital poles being the main sources of P 100 in association with the x-cells in the centre of the retina.
两名患者在皮质盲完全恢复前5小时和20小时的单光子发射计算机断层扫描显示局部血流正常，这使其有可能成为一个预后因素。一名患者被认为是由于创伤期间大脑后动脉在小脑幕边缘摩擦而非牵拉导致失明，另一名患者则是由于颈椎融合术中将骨移植片锤入时发生栓塞。失明期间模式翻转视觉诱发电位（PRVERs）消失；恢复后，尽管存在管状视野，但P100出现且波幅正常、潜伏期正常。这些与以下事实一致，即枕后极所代表的中央8 - 10度视野是与视网膜中央的x细胞相关的P100的主要来源。
