Whole head mapping of magnetic fields following painful electric finger shock
| Autor: | Ronald T. Wakai, Bryan A. Mjaanes, Charles S. Cleeland, John P. Balog, Eric W. Howland |
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| Rok vydání: | 1995 |
| Předmět: |
Adult
Male Cognitive Neuroscience Pain Experimental and Cognitive Psychology Somatosensory system Functional Laterality Fingers Behavioral Neuroscience Electromagnetic Fields medicine Humans Evoked potential Operculum (brain) Evoked Potentials Cerebral Cortex Communication Electroshock medicine.diagnostic_test business.industry Magnetoencephalography Magnetic resonance imaging Anatomy Magnetic Resonance Imaging Magnetic field Electrophysiology medicine.anatomical_structure Cerebral cortex Female business Psychology Head |
| Zdroj: | Brain research. Cognitive brain research. 2(3) |
| ISSN: | 0926-6410 |
| Popis: | Painful intracutaneous electric finger shock was delivered to the fifth digit of the non-dominant hand of five healthy volunteers. Whole head evoked magnetic field maps were collected and cortical localizations were calculated using local sphere equivalent current dipole fits. MRI scans were used to identify the anatomical structures where magnetic field sources were located. Anatomically, sources were identified bilaterally in the primary somatosensory region and SII-Insula regions. Additionally, frontal operculum sources were observed contralaterally in two subjects. Temporally, an initial contralateral SI activation at 40-60 ms was followed by several SII-Insula responses over the next several hundred milliseconds (ms). These SII-Insula responses were often interspersed with additional activations of the SI region. These later responses were observed in both hemispheres. |
| Databáze: | OpenAIRE |
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