Effect of extremely low frequency magnetic field in prevention of spinal cord injury-induced osteoporosis.
Manjhi J, Kumar S, Behari J, Mathur R. · 2013
View Original AbstractExtremely weak magnetic fields prevented bone loss in injured rats, proving biological effects occur at levels 180 times lower than common household exposures.
Plain English Summary
Researchers studied whether extremely low frequency magnetic fields could prevent bone loss in rats with spinal cord injuries. They exposed injured rats to 50 Hz magnetic fields (17.96 microTesla) for 2 hours daily over 8 weeks and found the treatment significantly prevented osteoporosis, maintaining bone density and mineral content compared to untreated injured rats. This suggests that specific magnetic field therapy might help preserve bone health after spinal cord injury.
Why This Matters
This study adds to growing evidence that extremely low frequency magnetic fields can have beneficial biological effects, specifically on bone health. The 17.96 microTesla exposure level is remarkably low - about 180 times weaker than typical household magnetic field exposures from appliances like hair dryers or electric shavers. What makes this research particularly significant is that it demonstrates measurable therapeutic effects at such minimal field strengths, challenging the conventional view that only high-intensity EMF exposures produce biological responses. The science demonstrates that our bodies can respond to extremely subtle electromagnetic signals, which has broader implications for understanding how the much stronger fields from modern technology might affect our health. While this study focused on therapeutic applications, it underscores the reality that biological systems are far more sensitive to electromagnetic fields than many regulatory agencies acknowledge.
Exposure Details
- Magnetic Field
- 0.01796 mG
- Source/Device
- 50 Hz
- Exposure Duration
- 2 h/d for 8 wk
Exposure Context
This study used 0.01796 mG for magnetic fields:
- 898x above the Building Biology guideline of 0.2 mG
- 179.6x above the BioInitiative Report recommendation of 1 mG
Building Biology guidelines are practitioner-based limits from real-world assessments. BioInitiative Report recommendations are based on peer-reviewed science. Check Your Exposure to compare your own measurements.
Where This Falls on the Concern Scale
Study Details
The present study was designed to investigate the effect of extremely low frequency (ELF) magnetic field (MF) on spinal cord injury (SCI)-induced osteoporosis in rats.
Adult male Wistar rats (n = 24) were equally divided into sham, SCI, and SCI+MF groups. Complete tra...
The BBB score decreased post-SCI, which partially recovered after ELF-MF. In SCI rats, there was a s...
The results suggest that the chronic (2 h/d ?? 8 wk) ELF-MF exposure (17.96 micro-Tesla, 50 Hz) to SCI rats is effective in attenuating SCI-induced osteoporosis.
Show BibTeX
@article{j_2013_effect_of_extremely_low_280,
author = {Manjhi J and Kumar S and Behari J and Mathur R.},
title = {Effect of extremely low frequency magnetic field in prevention of spinal cord injury-induced osteoporosis.},
year = {2013},
url = {https://www.rehab.research.va.gov/jour/2013/501/manjhi501.html},
}