Evaluating the Changes in Alpha-1 Band Due to Exposure to Magnetic Field

Document Type : Original Paper

Authors

1 Biophysics-Biochemistry Department, Faculty of Medicine, Rafsanjan University of Medical Sciences, Rafsanjan, Iran

2 Biomedical Engineering Department, Research Deputy of Medical sciences Faculty, Tarbiat Modares University, Tehran, Iran

3 Psychology Department, Tarbiat Modares University, Tehran, Iran

4 Iranian Center of Neurological Research, Imam Khomeini Hospital, Tehran University of Medical Sciences, Tehran, Iran

Abstract

Introduction
Increase in alpha band is observed when blood perfusion in frontal area of head decreases. The present study evaluated some changes in the alpha band particularly, alpha-1 of frontal and central areas of the head, when several areas were exposed simultaneously to magnetic field.
Materials and Methods
Five points of head (F3, F4, Cz, T3, and T4) of twenty healthy male participants were exposed to magnetic fields simultaneously by five separate coils at different frequencies of 45, 17, 10, 5, and 3 Hz, in five separate sessions. The magnetic field intensity was 100 µT at 1.5 cm distance from the coil. At the end, relative powers over these areas in common frequency and alpha-1 bands were evaluated by paired t-test.
Results
Significant reduction (p<0.05) in alpha-1 band was observed by exposure of local ELF magnetic field at frequencies of higher than 5 Hz in closed-eye. These reductive effects were enormous at 5 and 45 Hz frequency.
Conclusion
Observed reduction in alpha-1 band may be due to the influence of magnetic field exposure on production centers of alpha band, particularly the thalamus. Hence, increased blood perfusion in some areas is probably the cause of this reduction which requires more research.

Keywords

Main Subjects

References

  1.  

    1. Shupak NM, Prato FS, Thomas AW. Human exposure to a specific pulsed magnetic field: Effects on thermal sensory and pain thresholds. Neurosci Lett. 2004;363(2):157-62.
    2. Novikov VV, Novikov GV, Fesenko EE. Effect of weak combined static and extremely low-frequency alternating magnetic fields on tumor growth in mice inoculated with the Ehrlich ascites carcinoma. Bioelectromagnetics. 2009;30(5):343-51.
    3. Hwang SJ, Lublinsky S, Seo YK, Kim IS, Judex S. Extremely small-magnitude accelerations enhance bone regeneration: A preliminary study. Clin Orthop. 2009;467(4):1083-91.
    4. Gurgul S, Erdal N, Yilmaz SN, Yildiz A, Ankarali H. Deterioration of bone quality by long-term magnetic field with extremely low frequency in rats. Bone. 2008;42(1):74-80.
    5. Del Seppia C, Ghione S, Luschi P, Ossenkopp K-P, Choleris E, Kavaliers M. Pain perception and electromagnetic fields. Neurosci Biobehav Rev. 2007;31(4):619-42.
    6. Trimmel M, Schweiger E. Effects of an ELF (50 Hz, 1 mT) electromagnetic field (EMF) on concentration in visual attention, perception and memory including effects of EMF sensitivity. Toxicol Lett. 1998;96-97:377-82.
    7. Sienkiewicz ZJ, Haylock RGE, Saunders RD. Deficits in Spatial Learning after Exposure of Mice to a 50 Hz Magnetic Field. Bioelectromagnetics. 1998;19(2):79-84.
    8. Podd J, Abbott J, Kazantzis N, Rowland A. Brief Exposure to a 50 Hz, 100 μT Magnetic Field: Effects on Reaction Time, Accuracy, and Recognition Memory. Bioelectromagnetics. 2002;23(3):189-95.
    9. Lai H, Carino MA, Ushijima I. Acute Exposure to a 60 Hz Magnetic Field Affects Rats' Water-Maze Performance. Bioelectromagnetics. 1998;19(2):117-22.
    10. Lai H. Spatial learning deficit in the rat after exposure to a 60 Hz magnetic field. Bioelectromagnetics. 1996;17(6):494-6.
    11. Thomas AW, Drost DJ, Prato FS. Human subjects exposed to a specific pulsed (200 μT) magnetic field: Effects on normal standing balance. Neurosci Lett. 2001;297(2):121-4.
    12. Legros A, Gaillot P, Beuter A. Transient effect of low-intensity magnetic field on human motor control. Med Eng Phys. 2006;28(8):827-36.
    13. Legros A, Beuter A. Individual subject sensitivity to extremely low frequency magnetic field. Neurotoxicology. 2006;27(4):534-46.
    14. Legros A, Beuter A. Effect of a low intensity magnetic field on human motor behavior. Bioelectromagnetics. 2005;26(8):657-69.
    15. Fuller M, Wilson CL, Velasco AL, Dunn JR, Zoeger J. On the confirmation of an effect of magnetic fields on the interictal firing rate of epileptic patients. Brain Res Bull. 2003;60(1-2):43-52.
    16. Dobson J, St. Pierre TG, Schultheiss-Grassi PP, Gregor Wieser H, Kuster N. Analysis of EEC data from weak-field magnetic stimulation of mesial temporal lobe epilepsy patients. Brain Res. 2000;868(2):386-91.
    17. Dobson J, Pierre TS, Wieser HG, Fuller M. Changes in paroxysmal brainwave patterns of epileptics by weak-field magnetic stimulation. Bioelectromagnetics. 2000;21(2):94-9.
    18. Yousefi HA, Nasiri P. Psychological Effects of Occupational Exposure to Electromagnetic Fields. J Res Health Sci. 2006;6(1):18-21.
    19. Verkasalo PK, Kaprio J, Varjonen J, Romanov K, Heikkilä K, Koskenvuo M. Magnetic fields of transmission lines and depression. Am J Epidemiol. 1997;146(12):1037-45.
    20. Van Wijngaarde E, Savitz DA, Kleckner RC, Cai J, Loomis D. Exposure to electromagnetic fields and suicide among electric utility workers: A nested case-control study. West J Med. 2000;173(2):94-100.
    21. Sobiś J, Jarzab M, Hese RT, Sieroń A, Zyss T, Gorczyca P, et al. Therapeutic efficacy assessment of weak variable magnetic fields with low value of induction in patients with drug-resistant depression. J Affect Disord. 2010;123(1-3):321-6.
    22. Sieroń A, Hese RT, Sobiś J, Cieślar G. Estimation of therapeutical efficacy of weak variable magnetic fields with low value of induction in patients with depression. Psychiatr Pol. 2004 Mar-Apr;38(2):217-25.
    23. Shafiei SA, Firoozabadi SM, Tabatabaie KR, Ghabaee M. Investigation of Resonance Effect Caused by Exposure of Local extremely low frequency Magnetic Field on Brain Signals. Qom Univ Med Sci J. 2011;5(1):53-60.
    24. Shafiei SA, Firoozabadi SM, Tabatabaie KR, Ghabaee M. EEG changes during exposure to extremely low frequency magnetic field on a small area of brain. koomesh. 2010;12(2):167-74.
    25. Shafiei SA, Firoozabadi SM, Rasoulzadeh Tabatabaie K, Ghabaee M. Study of the frequency parameters of EEG influenced by zone-dependent local ELF-MF exposure on the human head. Electromagn Biol Med. 2012 Jun;31(2):112-21.
    26. Amirifalah Z, Firoozabadi SM, Shafiei SA, Assadi A. Scrutiny of brain signals variations in regions Cz, C3 and C4 under Local Exposure of Extremely Low Frequency and Weak pulsed Magnetic Field to promote Neurofeedback systems. Physiol Pharmacol. 2011;15(1):144-63.
    27. Gunkelman JD, Johnstone J. Neurofeedback and the brain. J Adult Devel. 2005;12(2-3):93-8.
    28. Cook IA, O'Hara R, Uijtdehaage SHJ, Mandelkern M, Leuchter AF. Assessing the accuracy of topographic EEG mapping for determining local brain function. Electroencephalography and Clinical Neurophysiology. 1998;107(6):408-14.
    29. Kavaliers M, Ossenkopp KP, Prato FS, Innes DGL, Galea LAM, Kinsella DM, et al. Spatial learning in deer mice: Sex differences and the effects of endogenous opioids and 60 Hz magnetic fields. J Comp Physiol A. 1996;179(5):715-24.
    30. Bell GB, Marino AA, Chesson AL. Frequency-specific responses in the human brain caused by electromagnetic fields. J Neurol Sci. 1994;123(1-2):26-32.
    31. Bell G, Marino A, Chesson A, Struve F. Electrical states in the rabbit brain can be altered by light and electromagnetic fields. Brain Res. 1992;570(1-2):307-15.
    32. Cook CM, Thomas AW, Prato FS. Resting EEG Is Affected by Exposure to a Pulsed ELF Magnetic Field. Bioelectromagnetics. 2004;25(3):196-203.
    33. Marino AA, Bell GB, Chesson A. Low-level EMFs are transduced like other stimuli. J Neurol Sci. 1996;144(1-2):99-106.
    34. Ghione S, Del Seppia C, Mezzasalma L, Bonfiglio L. Effects of 50 Hz electromagnetic fields on electroencephalographic alpha activity, dental pain threshold and cardiovascular parameters in humans. Neurosci Lett. 2005;382(1-2):112-7.
    35. Cook CM, Saucier DM, Thomas AW, Prato FS. Changes in human EEG alpha activity following exposure to two different pulsed magnetic field sequences. Bioelectromagnetics. 2009;30(1):9-20.
    36. Johnstone J, Gunkelman J, Lunt J. Clinical database development: Characterization of EEG phenotypes. Clin EEG Neurosci. 2005;36(2):99-107.
    37. Clarke AR, Barry RJ, McCarthy R, Selikowitz M. Excess beta activity in children with attention-deficit/hyperactivity disorder: an atypical electrophysiological group. Psychiatry Res. 2001;103(2-3):205-18.
Iranian Journal of Medical Physics
Volume 9, Issue 2 - Serial Number 2
May and June 2012
Pages 141-152

Files

History

  • Receive Date: 27 November 2011
  • Revise Date: 03 March 2013
  • Accept Date: 19 June 2012

Share

How to cite

Statistics