Hess C W, Meienberg O, Ludin H P
J Neurol. 1982;227(4):193-200. doi: 10.1007/BF00313386.
Pattern-evoked and flash-evoked responses were recorded from four patients with acute blindness due to occipital ischaemia. No responses could be obtained with pattern stimulation. Flash stimulation, however, yielded well-reproducible potentials in all four cases in spite of practically complete visual loss. In one patient vision recovered completely while the three others showed poor or minimal recovery in restricted visual field areas only. It is concluded that the flash method is not appropriate for differentiation of occipital blindness from psychogenic visual disorders. Furthermore, preserved flash-evoked potentials in the acute stage of occipital blindness cannot be taken as a reliable prognostic sign for visual recovery, as has been postulated by others. A possible extrastriate origin of these flash responses is discussed in view of recent theories on a second visual system.
对4例因枕叶缺血导致急性失明的患者记录了图形诱发反应和闪光诱发反应。图形刺激未引出反应。然而，尽管实际上视力完全丧失，但闪光刺激在所有4例患者中均产生了重复性良好的电位。1例患者视力完全恢复，而其他3例仅在视野受限区域有较差或极小的恢复。结论是，闪光法不适用于区分枕叶失明与心因性视觉障碍。此外，枕叶失明急性期保留的闪光诱发电位不能像其他人所假设的那样，作为视力恢复的可靠预后指标。鉴于最近关于第二视觉系统的理论，讨论了这些闪光反应可能的纹外起源。
