A W Thomas
Affiliation: University of Western Ontario
- Magnetic field exposure and behavioral monitoring systemA W Thomas
Bioelectromagnetics Western, Department of Nuclear Medicine and MR, The Lawson Health Research Institute, St Joseph s Health Care, London, Ontario, Canada N6A 4V2
Bioelectromagnetics 22:401-7. 2001..5 m coil set was 500 Hz at +/- 463 microT, 1 kHz at +/- 232 microT, 150 micros rise time from -200 microT(pk) to + 200 microT(pk) (square wave) and is limited by the maximum voltage ( +/- 146 V) of the amplifier (Bessel filter bypassed)...
- Pulsed magnetic field induced "analgesia" in the land snail, Cepaea nemoralis, and the effects of mu, delta, and kappa opioid receptor agonists/antagonistsA W Thomas
Neuroscience Program, Faculty of Dentistry, University of Western Ontario, London, Canada
Peptides 18:703-9. 1997..These results suggest that this specific pulsed magnetic field (Cnp) elicits significant analgesic effects through mechanisms that, in part, involve delta and, to a lesser extent mu opioid receptors...
- Analgesic effects of a specific pulsed magnetic field in the land snail, Cepaea nemoralis: consequences of repeated exposures, relations to tolerance and cross-tolerance with DPDPEA W Thomas
Neuroscience Program, University of Western Ontario, London, Canada
Peptides 19:333-42. 1998..These findings suggest that the partial development of tolerance to the opioid-mediated portion of Cnp-induced analgesia may be countered by altering the specific environmental Cnp exposure conditions...
- Antinociceptive effects of a pulsed magnetic field in the land snail, Cepaea nemoralisA W Thomas
Neuroscience Program, University of Western Ontario, London, Canada
Neurosci Lett 222:107-10. 1997..These findings suggest that specific magnetic field exposure designs may be tailored to produce significant behavioral effects including, but certainly not limited to, the induction of analgesia...
- A comparison of rheumatoid arthritis and fibromyalgia patients and healthy controls exposed to a pulsed (200 microT) magnetic field: effects on normal standing balanceA W Thomas
The Lawson Health Research Institute, Department of Nuclear Medicine and MR, St Joseph s Health Care, 268 Grosvenor Street, London, N6A 4V2, Ontario, Canada
Neurosci Lett 309:17-20. 2001..2(1,28), P<0.09]. Therefore RA and FM patients, and healthy controls, have significantly different postural sway in response to a specific pulsed MF...
- Extremely low frequency magnetic fields can either increase or decrease analgaesia in the land snail depending on field and light conditionsF S Prato
Lawson Research Institute, University of Western Ontario, Canada
Bioelectromagnetics 21:287-301. 2000..Furthermore, these effects were dependent on the presence of light; the effects were absent in the absence of light. These observed increases and decreases in opioid analgaesia are largely consistent with the predictions of Lednev's PRM...
- Light-dependent and -independent behavioral effects of extremely low frequency magnetic fields in a land snail are consistent with a parametric resonance mechanismF S Prato
Bioelectromagnetics Western, University of Western Ontario, Canada
Bioelectromagnetics 18:284-91. 1997..This finding suggests that in both the presence and the absence of light the effect of the ELF magnetic field was mediated by a direct magnetic field detection mechanism such as the PRM rather than an induced current mechanism...
- Neurophysiological and behavioral effects of a 60 Hz, 1,800 μT magnetic field in humansA Legros
Imaging Division, Lawson Health Research Institute, St Joseph s Health Care, 268 Grosvenor St, London, ON N6A 4V2, Canada
Eur J Appl Physiol 112:1751-62. 2012..g., EEG or voluntary motor control). These results suggest that 1 h of 60 Hz, 1,800 μT MF exposure may modulate human involuntary motor control without being detected in the cortical electrical activity...
- Human subjects exposed to a specific pulsed (200 microT) magnetic field: effects on normal standing balanceA W Thomas
The Lawson Research Institute, Department of Nuclear Medicine and MR, St Joseph s Health Care, 268 Grosvenor Street, London, N6A 4V2, Ontario, Canada
Neurosci Lett 297:121-4. 2001..There was no significance found in control condition testing, such as sham-sham exposure of subjects or sham/PEMF exposure of a 60 kg saline phantom. There were no significant effects of gender or age...
- Sex differences in conditioned taste aversion and in the effects of exposure to a specific pulsed magnetic field in deer mice Peromyscus maniculatusE Choleris
Department of Nuclear Medicine and Magnetic Resonance, Lawson Research Institute, St Joseph s Health Center and University of Western Ontario, 268 Grosvenor Street, N6A 4L6, London, Ontario, Canada
Physiol Behav 71:237-49. 2000..The sex differences are discussed in terms of a sexually dimorphic sensitivity to experimental manipulation and the induction of stress and/or anxiety...
- A detailed ethological analysis of the mouse open field test: effects of diazepam, chlordiazepoxide and an extremely low frequency pulsed magnetic fieldE Choleris
Room 9222D, Department of Psychology, Social Science Center, University of Western Ontario, London, Ontario, Canada N6A 5C2
Neurosci Biobehav Rev 25:235-60. 2001..e. pulsed magnetic field) on anxiety-like behaviors, but also permits the examination of non-specific effects, in particular those on general activity...
- Human standing balance is affected by exposure to pulsed ELF magnetic fields: light intensity-dependent effectsF S Prato
The Lawson Health Research Institute, Department of Nuclear Medicine and MR, St. Joseph's Health Care (London, Ontario, Canada
Neuroreport 12:1501-5. 2001..In a second experiment on 26 normal subjects exposed to the identical protocol, but at greater light intensities (0.51 W/m2), a significant but opposite effect was observed...
- Deep brain stimulation, vagal nerve stimulation and transcranial stimulation: An overview of stimulation parameters and neurotransmitter releaseG C Albert
Lawson Health Research Institute, Department of Medical Biophysics, The University of Western Ontario, London, Canada
Neurosci Biobehav Rev 33:1042-60. 2009....
- Effects of acute hypoxia on postural and kinetic tremorA Legros
Imaging Program, Lawson Health Research Institute, St Joseph s Health Care, 268 Grosvenor St, London, Ontario, N6A 4V2, Canada
Eur J Appl Physiol 110:109-19. 2010....
- Shielding, but not zeroing of the ambient magnetic field reduces stress-induced analgesia in miceE Choleris
Lawson Health Research Institute, St Joseph s Health Centre and University of Western Ontario, 268 Grosvenor Street, London, ON, Canada N6A 4V2
Proc Biol Sci 269:193-201. 2002..This has important implications for other reported effects of exposures to very weak magnetic fields and for the theoretical work that considers the mechanisms underlying the biological detection of weak magnetic fields...
- Human electrophysiological and cognitive effects of exposure to ELF magnetic and ELF modulated RF and microwave fields: a review of recent studiesC M Cook
Lawson Health Research Institute, Department of Nuclear Medicine MR, St Joseph s Health Care, London, Ontario, Canada
Bioelectromagnetics 23:144-57. 2002..We also consider some of the confounding factors within current human MF studies and suggest some new strategies for further experimentation...
- Quantification of pain-induced changes in cerebral blood flow by perfusion MRID G Owen
Lawson Health Research Institute, St Joseph s Health Care London, 268 Grosvenor Street, London, Ont, Canada N6A 4V2
Pain 136:85-96. 2008..97ml/100g/min in ipsilateral thalamus to 4.91ml/100g/min in contralateral insula. The average resting global CBF was 54+/-9.7ml/100g/min, and there was no change in global CBF due to the noxious thermal stimulus...
- Geophysical variables and behavior: LXXVII. Increased geomagnetic activity and decreased pleasantness of spontaneous narratives for percipients but not agentsD R Churchill
Department of Psychology, Laurentian University, Sudbury, Ontario, Canada
Percept Mot Skills 79:387-92. 1994..Implications for the hypothesis of affective concordance between emotionally bonded human beings and its role in episodes of potentially veridical telepathic experiences are discussed...
- Exposure to ELF magnetic and ELF-modulated radiofrequency fields: the time course of physiological and cognitive effects observed in recent studies (2001-2005)C M Cook
Department of Psychology, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
Bioelectromagnetics 27:613-27. 2006..We also consider the sensitivity of various physiological assays and performance measures in the study of biological effects of electromagnetic fields...