Search PubMed⌕ Search

PubMed · 8063529

Magnetic fields normalize visual evoked potentials and brainstem auditory evoked potentials in multiple sclerosis.

Abstract

The present communication concerns a 46 year old woman with a 10 year history of chronic progressive multiple sclerosis (MS) in whom external application of magnetic fields (MF) (7.5 picoTesla; 5 Hz) during a period of remission resulted in a rapid and dramatic improvement in symptoms including vision, cerebellar symptomatology (ataxia and dysarthria), mood, sleep, bowel and bladder functions as well as fatigue. Improvement in the patient's symptoms was associated with normalization of the pretreatment latencies of the visual evoked potentials and brainstem auditory evoked potential responses within a week after initiation of magnetic treatment. This report demonstrates that treatment with picoTesla MF is an effective, nonpharmacological modality in the management of MS and for the first time documents reversal of abnormal evoked potential responses by this treatment. The pineal gland is a magnetosensor. As MF affect the release of the pineal gland's principal hormone, melatonin, it is hypothesized that the effects of picoTesla MF in MS are partly mediated by the pineal gland which has recently been implicated in the pathogenesis of MS (Sandyk, 1992 a; b).

Explore related subjects

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

R Sandyk, K Derpapas. 1993. Magnetic fields normalize visual evoked potentials and brainstem auditory evoked potentials in multiple sclerosis.. https://doi.org/10.3109/00207459308994279

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related citations

Development and evaluation of the electromagnetic hypersensitivity questionnaire.

Electromagnetic hypersensitivity (EHS) syndrome is usually defined as a condition where an individual experiences adverse health effects that he or she believes is due to exposure to objects that emit electromagnetic fields. The aim of this study was to develop a questionnaire that would identify the key symptoms associated with EHS and determine how often these symptoms occur in the general population of the United Kingdom. In the pilot study, an EHS questionnaire was developed and tested. In Study 1 the EHS questionnaire was revised and sent to a randomly selected sample of 20,000 people. Principal components analysis of the symptoms resulted in eight subscales: neurovegetative, skin, auditory, headache, cardiorespiratory, cold related, locomotor, and allergy related symptoms. Study 2 established the validity of the questionnaire in that EHS individuals showed a higher severity of symptoms on all subscales compared to the control group. The two key results of this study were the development of a scale that provides an index of the type and intensity of symptoms commonly experienced by people believing themselves to be EHS and a screening tool that researchers can use to pre-select the most sensitive individuals to take part in their research.

Electromagnetic Fields↗

Extremely low frequency weak magnetic fields enhance resistance of NN tobacco plants to tobacco mosaic virus and elicit stress-related biochemical activities.

Increasing evidence has accumulated concerning the biological effects of extremely low frequency magnetic fields (ELF-MFs) in different plant models. In the present study, effects of ELF-MFs in tobacco plants reacting to tobacco mosaic virus (TMV) with a hypersensitive response (HR) were evaluated. Plants were exposed for 8 or 24 h (either before or after TMV inoculation) to a static MF, at either -17 or 13 microT, combined with a 10 Hz sinusoidal MF with different intensities (25.6 or 28.9 microT). The working variables were the area and number of hypersensitive lesions in leaves. Following ELF-MFs exposure, an increased resistance was detected, particularly after an 8-h treatment, as shown by the decrease in lesion area and number. Moreover, two enzyme activities involved in resistance mechanisms were analyzed: ornithine decarboxylase (ODC) and phenylalanine ammonia-lyase (PAL). Uninoculated leaves previously exposed to ELF-MFs in general showed a significant increase relative to controls in ODC and PAL activities, in particular for 13 microT static MF plus 28.9 microT, 10 Hz sinusoidal MF (24 h) treatment. In conclusion, ELF-MFs seem to influence the HR of tobacco to TMV, as shown by the increased resistance and changes in ODC and PAL activities, indicating the reliability of the present plant model in the study of bioelectromagnetic interactions.

Electromagnetic Fields↗