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Light alters nociceptive effects of magnetic field shielding
Author(s) -
Koziak Adrian M.,
Desjardins Dawn,
Keenliside Lynn D.,
Thomas Alex W.,
Prato Frank S.
Publication year - 2006
Publication title -
bioelectromagnetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.435
H-Index - 81
eISSN - 1521-186X
pISSN - 0197-8462
DOI - 10.1002/bem.20170
Subject(s) - electromagnetic shielding , nociception , magnetic field , shielded cable , electromagnetic field , shielding effect , earth's magnetic field , nuclear magnetic resonance , optics , physics , materials science , medicine , composite material , electrical engineering , receptor , quantum mechanics , engineering
Orientation and nociception (pain sensitivity) are affected by exposure to geomagnetic or low frequency (<1000 Hz) magnetic fields of approximately the earth's field strength, i.e., 50 µT. However, these effects are often dependent on the simultaneous presence of visible light. Recently, it was shown that nociception was affected in mice acutely exposed to an electromagnetic‐shielded environment in the dark (<0.05 W/m 2 ) during the mid‐light phase of the diurnal cycle. Here, we report for the first time that if mice are exposed to magnetic shielding in the presence of visible light (0.6 W/m 2 , 400–750 nm) that most of the effects of shielding are eliminated. This simple experimental protocol may be useful in investigating the role that light plays in the detection of ambient electromagnetic fields. Bioelectromagnetics 27:10–15, 2006. © 2005 Wiley‐Liss, Inc.