Nyrke T, Kangasniemi P, Lang A H
Department of Clinical Neurophysiology, University Central Hospital of Turku, Finland.
Headache. 1990 Feb;30(3):133-7. doi: 10.1111/j.1526-4610.1990.hed3003133.x.
Unilateral abnormalities in the regional cerebral blood flow (rCBF) and visual evoked potentials (VEPs) during the visual aura of classic migraine have been reported. On the other hand, there are only few observations suggesting unilateral abnormality of neural function during the headache-free period. An experiment is described in which the symmetries of steady state VEPs (SVEPs) are compared in healthy subjects and classic migraineurs in the headache-free interval. In the patients an increased number of strong short-lasting interhemispheric asymmetries was found. In the serial recordings performed, pathologic recordings were obtained intermittently, usually with complete normalisation in the following session. The incidence of abnormalities was relatively independent of the interval between the recording and attack, except for the next few hours. The findings may be related to instability of occipital cortical function in classic migraine.
据报道，典型偏头痛发作时视觉先兆期存在局部脑血流（rCBF）和视觉诱发电位（VEP）的单侧异常。另一方面，仅有少数观察结果提示在无头痛期存在神经功能的单侧异常。本文描述了一项实验，比较了健康受试者和典型偏头痛患者在无头痛间歇期稳态视觉诱发电位（SVEPs）的对称性。在患者中发现半球间强烈的短期不对称现象增多。在进行的系列记录中，间歇性地获得了病理记录，通常在下一次记录时完全恢复正常。异常发生率相对独立于记录与发作之间的间隔时间，但在接下来的几个小时内除外。这些发现可能与典型偏头痛中枕叶皮质功能的不稳定性有关。
