PAINFUL STIMULATION OF THE FOREHEAD INCREASES PHOTOPHOBIA IN MIGRAINESUFFERERS

Thresholds for visual and auditory discomfort were investigated in 51 migraine sufferers and 27 controls of similar age and sex distribution who rarely suffered from headache. Tests in migraine sufferers were c arried out during the headache-free interval. Discomfort thresholds we re measured before and during painful stimulation of the forehead with ice. The visual discomfort threshold was lower in migraine sufferers than in controls, and decreased further during painful stimulation of the forehead. In contrast, the auditory discomfort threshold was simil ar in migraine sufferers and controls, and did not decrease during pai nful stimulation of the forehead. These Findings suggest that trigemin al discharge contributes to photophobia but not phonophobia in migrain e sufferers.