Fascinating article…by Nancy Bonk on Health Central
“Another study used a white moving dot pattern on a black background to visually stimulate the subjects, showing the Migraine group had a stronger activation in the middle temporal complex (motion sensitive region) compared to the non-Migraine group. These studies support the idea that Migraineurs have enhanced reaction to light and motion stimuli in addition to having thicker cortex in the visual motion processing centers of the brain compared to non-Migraineurs.”
Yep… that relation I can understand since I am really hypersensitive to both light and motion. Both of which persistent beyond the migraine but are obviously worse with one.
“Dr. Schwedt rounded out his session discussing how a Migraineur “co-processes” different stimuli and that Migraine itself is multisensory integration that has “gone wrong.” He went on to explain what multisensory integration is:
“sensory-specific brain responses and perceptual judgments of incoming sensory stimuli which concern one sense may be modulated by relations with other senses.”
This means, our brains can take in many sensory stimuli (visual, olfactory, auditory and somatosensory) at the same time and process them simultaneously – we don’t process one type of stimuli at a time. He thinks this is important because Migraineurs with osmophobia seem to have a higher attack frequency and are found to be photophobic. If Migraineurs are hypersensitive to light they may also be sensitive to odors and have a hyper reactive trigeminal system. One study that measured pain thresholds in a group of Migraineurs who were not experiencing a Migraine and were exposed to bright light, became more sensitive after exposure when their pain thresholds were re-measured. This did not happen in the control group.”
Again, isn’t that interesting to note? How the stimulus gets tangled up? Makes a lot of sense doesn’t it? Certainly, it seems that our senses are hyper-aware during a migraine. That super sense of smell, photophobia, super hearing… too much of everything. And I am definitely photophobic and have been for decades. And odors… Anyway, it is quite intriguing. This was a few years back. I am re-printing it from my brainless blogger blog.