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Related Experiment Video

Updated: May 11, 2026

Planarian as an Animal Model for Experimental Acute Seizure

Planarian as an Animal Model for Experimental Acute Seizure

Published on: February 14, 2025

Temporally-patterned magnetic fields induce complete fragmentation in planaria.

Nirosha J Murugan¹, Lukasz M Karbowski, Robert M Lafrenie

¹Department of Biology, Laurentian University, Sudbury, Ontario, Canada.

|April 27, 2013

Summary

Weak, patterned magnetic fields caused complete planarian dissolution. A specific two-stage magnetic field sequence led to 100% planarian death within 24 hours, suggesting effects on cell structure.

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Planarian Immobilization, Partial Irradiation, and Tissue Transplantation

Planarian Immobilization, Partial Irradiation, and Tissue Transplantation

Published on: August 6, 2012

Area of Science:

Biophysics
Regenerative Biology
Magnetobiology

Background:

Planarians are model organisms for regeneration studies.
Understanding external factors influencing biological processes is crucial.
Temporally-patterned magnetic fields represent an underexplored environmental stimulus.

Purpose of the Study:

To investigate the effects of a specific tandem sequence of weak magnetic fields on planarian viability.
To determine if magnetic field exposure can induce complete dissolution in planarians.

Main Methods:

Planarians were exposed daily for 6.5 hours to a frequency-modulated magnetic field (0.1-2 µT) for five consecutive days.
On the fifth day, this was immediately followed by a second 6.5-hour exposure to a complex magnetic field (0.5-5 µT) with increasing spectral power.
Control groups received reversed field sequences or single field patterns.

Main Results:

The specific tandem sequence of magnetic fields resulted in 100% planarian dissolution within 24 hours.
Reversing the sequence or using only one field pattern did not induce dissolution.
Video analysis showed initial planarian expansion followed by size reduction and death, suggesting cellular disruption.

Conclusions:

A precisely sequenced, weak magnetic field exposure can be a potent agent for complete planarian dissolution.
The observed effects suggest significant impacts on planarian contractile proteins and cell membrane permeability.
This finding opens new avenues for research into non-invasive biological manipulation using magnetic fields.