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Sensitivity of the Human Brain to Magnetic Fields: Evocation of Epileptiform Activity.
Last modified on:
Wednesday, November 05, 2008 16:33:11
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The effects of DC magnetic fields on brains of epilepsy patients were investigated. Application of 1- to 2-mT magnetic fields induced significantly higher levels of epileptiform activity in 6 of 8 patients with drug resistant meso-temporal lobe epilepsy. Removal of the fields appeared to cause epileptiform discharges in some instances, suggesting that the change in field may be more important than application of a magnetic field. The reason for enhanced sensitivity of epilepsy patients to magnetic fields is not known. The authors speculate that it could be related to the existence of biomineralized ferrimagnetic magnetite, which has been found in brain tissues of epileptic and nonepileptic subjects, or it could reflect a direct effect of the field on some aspect of central nervous system activity. [BENER 11781]
READER COMMENTS
November 21, 2001 - Dr Barnes (Bangor Scientific Consultants)
I recently did a simple experiment in the School where I work to pull food grade iron out of ground up breakfast cereal for year 6 children with a strong bar magnet. To my amazement, and never having noticed it before, I felt a distinct tingling in the palm of my right hand as I held the magnet. Rather like a very weak electric current. About 25% of the children also felt the same effect. Does anyone out there have any ideas please?
September 27, 1999 - Kimberly Johns
I have just read your posting. I was wondering if this could apply to why my son's seizures are only triggered by poor weather. I have discussed this with more doctors than I can count, and no one could validate this. If you have any other similar studies I would be interested in reading them. Thank you for your time.
November 14, 1996 - Ian Campbell, Laurentian University.
Much of the data on epileptic patients points to a continuum of limbic and temporal lobe hypersensitivity. Since magnetic field fluctuations do occur, it is highly likely that these fluctuations carry biorelevant information that can can pass the steady state and result in abnormal firing activity of neurons and subsequent seizure. I am a thesis student researching the effects of magnetic fields on semantic memory. I would appreciate any information that you may know of.
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