Posted by stowware on
URL: https://www.es-forum.com/EHS-Info-tp3364570p3377095.html

http://www.nlm.nih.gov/medlineplus/news/fullstory_116794.html

I found this story today about MRIs creating vertigo (included beginning & end of article):

FRIDAY, Sept. 23 (HealthDay News) -- Many people who undergo MRI scans describe feeling dizzy while inside the machine or when they come out, and a new study may explain why.

Researchers believe that the strong magnet used during an MRI pushes on fluid circulating in the inner ear, impacting balance and often leading to a feeling of vertigo or free-falling...............
After taking into consideration known facts about the inner ear, the researchers concluded that MRI-related vertigo is probably the result of force exerted on the electrically charged fluid of the inner ear by the magnetic fields of MRIs.

The finding could challenge the results of previous functional MRI studies designed to detect brain activity, the study authors noted, because the scanner itself could be causing brain activity related to movement and balance, skewing results.

"We've shown that even when you think there's nothing happening in the brain while volunteers are in the scanner, there's actually a lot happening because MRI itself is causing some effect," explained Dale Roberts, senior research systems engineer in the department of neurology at Johns Hopkins University School of Medicine, in a university news release. "These effects must be taken into account in the way we interpret functional imaging."

Nancy

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