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Comparisons of Responses by Planarian to Micromolar to Attomolar Dosages of Morphine or Naloxone and/or Weak Pulsed Magnetic Fields: Revealing Receptor Subtype Affinities and Nonspecific Effects.

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Murugan NJ, Persinger MA. · 2014

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Magnetic fields 10 times weaker than Earth's field produced drug-like effects on nervous system function in laboratory organisms.

Plain English Summary

Summary written for general audiences

Researchers exposed flatworms (planaria) to extremely weak magnetic fields (5 microTesla) for 2 hours and measured their movement speed. The magnetic field exposure reduced the worms' activity by about 50%, similar to the effects of morphine and other opioid drugs. This suggests that weak magnetic fields can affect nervous system function in ways that mimic drug effects.

Why This Matters

This study reveals something remarkable: magnetic fields at just 5 microTesla can produce neurological effects equivalent to opioid drugs. To put this in perspective, that's roughly 10 times weaker than Earth's natural magnetic field and hundreds of times weaker than typical household magnetic field exposures from appliances and power lines. What makes this particularly significant is that planaria have simple nervous systems that share fundamental similarities with human neural pathways, including opioid-like receptors. The researchers found that these ultra-weak magnetic fields essentially 'drugged' the worms, slowing their movement by half. While we can't directly extrapolate from flatworms to humans, this research adds to a growing body of evidence that even very low-level magnetic field exposures can influence biological systems in ways we're only beginning to understand.

Exposure Details

Magnetic Field
0.005 mG
Exposure Duration
2h

Exposure Context

This study used 0.005 mG for magnetic fields:

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 Exposure Level in ContextStudy Exposure Level in ContextThis study: 0.005 mGExtreme Concern - 5 mGFCC Limit - 2,000 mGEffects observed in the No Concern rangeFCC limit is 400,000x higher than this level

Study Details

The behavioral responses of planaria to the exposures of a range of concentrations of morphine (μM to attoM) or the μ-opiate antagonist naloxone or to either of these compounds and a burst-firing magnetic field (5 μT) were studied.

The locomotor velocity (LMV) of planaria was measured after individual worms were exposed to increas...

Compared to spring water controls, the 2-hour exposure to the patterned magnetic field before measur...

The results support the presence of at least two receptor subtypes that mediate the diminished activity effects elicited by morphine specifically and suggests that exposure to the specifically patterned magnetic field produces a behavioral suppression whose magnitude is similar to the ‘dose independent’ effects from this opiate.

Cite This Study
Murugan NJ, Persinger MA. (2014). Comparisons of Responses by Planarian to Micromolar to Attomolar Dosages of Morphine or Naloxone and/or Weak Pulsed Magnetic Fields: Revealing Receptor Subtype Affinities and Nonspecific Effects. Int J Radiat Biol. 2014 Oct;90(10):833-40.
Show BibTeX
@article{nj_2014_comparisons_of_responses_by_281,
  author = {Murugan NJ and Persinger MA.},
  title = {Comparisons of Responses by Planarian to Micromolar to Attomolar Dosages of Morphine or Naloxone and/or Weak Pulsed Magnetic Fields: Revealing Receptor Subtype Affinities and Nonspecific Effects.},
  year = {2014},
  doi = {10.3109/09553002.2014.911421},
  url = {https://www.tandfonline.com/doi/abs/10.3109/09553002.2014.911421},
}
DOI: 10.3109/09553002.2014.911421

Cited By (20 papers)

Quick Questions About This Study

Yes, research shows weak magnetic fields can impact nervous system activity. A 2014 study found that extremely weak magnetic fields (5 microTesla) reduced flatworm movement by 50%, similar to morphine's effects, suggesting magnetic fields can influence neural function in drug-like ways.
Research indicates magnetic fields can cause behavioral suppression. Scientists exposed flatworms to weak pulsed magnetic fields for 2 hours and observed a 50% reduction in activity levels, comparable to effects produced by opioid drugs like morphine and naloxone.
Studies suggest even extremely weak EMF exposure can affect nervous system function. Research on flatworms showed that 5 microTesla magnetic fields produced behavioral effects similar to opioid drugs, indicating potential impacts on neural activity at very low exposure levels.
Magnetic fields appear to influence brain activity through mechanisms similar to drug receptors. A study found that weak magnetic field exposure reduced flatworm activity by 50%, mimicking morphine's effects and suggesting magnetic fields interact with nervous system receptor pathways.
Research demonstrates EMF exposure can produce drug-like behavioral effects. Scientists found that weak magnetic fields caused the same 50% reduction in flatworm activity as morphine, suggesting electromagnetic fields can trigger responses similar to opioid medications in biological systems.