Magnetic field effects on stress-induced analgesia in mice: modulation by light.
Exposure of adult male CD-1 mice to restraint stress for 60 min increased their hindpaw-licking latency in a hot-plate test (50 degrees C); this analgesia was significantly reduced after exposure to a stable magnetic field (MF) (30-40 G) under white light. In contrast, MF exposure under either red light or total darkness did not alter stress-induced analgesia. Results suggest that in rodents perception of magnetism might involve a light-dependent mechanism as recently found for migratory birds and amphibians.
Betancur
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Section of Behavioral Pathophysiology, Istituto Superiore di Sanità, Rome, Italy.
Dell'Omo
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G
Alleva
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E
D000698:Analgesia; D000818:Animals; D006614:Hindlimb; D008027:Light; D008280:Magnetics; D008297:Male; D051379:Mice; D009482:Neurophysiology; D013312:Stress, Physiological