Pain relief using different doses of pulsed magnet therapy was investigated in a clinical study using functional magnetic resonance imaging. In addition to various powers, frequencies of 9, 5, 3, and 1 Hz were applied to induced acute thermal pain in 47 volunteers.
Based on the results of previous studies, changes in the hippocampus, ipsilateral insula and anterior cingulate cortex were investigated, as the effect of pulsed magnet therapy on pain processing and loss of pain perception has been demonstrated in these central brain structures.
The specific intensity of the applied pulsed magnetic field was reflected here by a proportional change in BOLD activity.The change in this activity was recorded by the BOLD fMRI method, or Blood Oxygenation Level Dependant functional magnetic resonance imaging.
Simply put, the effect of pulsed magnetotherapy was studied by displaying and comparing blood oxygenation values in the above mentioned active brain regions.
The results confirmed that the body’s response to pain, i.e. reduced pain perception, is proportional to the intensity of pulsed magnet therapy.
Source. Obertson, J. A. et al. (2010) Evidence for a dose-dependent effect of pulsed magnetic fields on pain processing. Neuroscience Letters. [Online] 482 (2), 160-162.
Evidence for a Dose-dependent Effect of Pulsed Magnetic Field on Pain Processing
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