Pain-related magnetic fields following painful CO2 laser stimulation in man
Abstract
The initial somatosensory evoked magnetic fields following painful heat stimulation by CO2 laser beam applied to the upper and lower limb were investigated in normal subjects. The main deflections, 'Pain MA' and 'Pain ML' following the arm and leg stimulation, respectively, were identified in the bilateral second sensory cortices (SII). The onset latencies of Pain MA and Pain ML were approximately 150 and 200 ms, respectively. No consistent equivalent current dipole was found in other areas including the primary sensory cortex in each hemisphere. Therefore, we consider that neurons in the bilateral SII are initially activated following painful heat stimulation.
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The cemi field theory predicts that painful stimuli stimulate large perturbations in the brain's EM field, and this prediction is confirmed by many EEG and MEG experiments.
“The cemi field theory easily accounts for this phenomenon by predicting that painful stimuli stimulate large (though likely informationally simple) perturbations in the brain's EM field.This prediction is confirmed by many EEG and MEG experiments, for example [54].”
From The electromagnetic will (2021) · cites this paper as [54]
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- Authors
- Kakigi, R., Koyama, S., Hoshiyama, M., Kitamura, Y., Shimojo, M., & Watanabe, S.
- Affiliations
- National Institute for Physiological Sciences (JP)
- Venue
- Neuroscience Letters
- Publisher
- Elsevier BV
- Published
- 1995-06
- Volume
- 192
- Issue
- 1
- Pages
- 45-48
- ISSN
- 0304-3940 (ISSN-L)
- OpenAlex
- W2001306738
- Cited by
- 146
- References
- 19
- Citations by year
- 2023: 1 · 2022: 1 · 2021: 1 · 2019: 3 · 2018: 2 · 2017: 3 · 2016: 2 · 2015: 2 · 2014: 2 · 2013: 3 · 2012: 2
- FWCI
- 5.07
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Neuroscience Letters (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Health Sciences › Medicine › Physiology › Pain Mechanisms and Treatments
- Health Sciences › Medicine › Anesthesiology and Pain Medicine › Pain Management and Treatment
- Life Sciences › Neuroscience › Cognitive Neuroscience › Neural dynamics and brain function
- Keywords
- somatosensory evoked fields, CO2 laser stimulation, secondary somatosensory cortex, equivalent current dipole, primary sensory cortex
- MeSH terms
- Adult, Arm, Carbon Dioxide, Evoked Potentials, Somatosensory, Extremities, Hot Temperature, Humans, Lasers, Male, Pain, Somatosensory Cortex, Magnetoencephalography
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