Supported by a grant from the Research Fund of Farmos Group Ltd., Finland and A/B Hässle, Sweden. T. Nyrkeis a Research Fellow of the Academy of Finland during 1986-89.
Transient Asymmetries of Steady-State Visual Evoked Potentials in Classic Migraine
Article first published online: 20 MAY 2005
Headache: The Journal of Head and Face Pain
Volume 30, Issue 3, pages 133–137, February 1990
How to Cite
Nyrke, T., Kangasniemi, P. and Lang, H. (1990), Transient Asymmetries of Steady-State Visual Evoked Potentials in Classic Migraine. Headache: The Journal of Head and Face Pain, 30: 133–137. doi: 10.1111/j.1526-4610.1990.hed3003133.x
- Issue published online: 20 MAY 2005
- Article first published online: 20 MAY 2005
- Accepted for Publication: December 23, 1989.
- Cited By
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.