Static Magnetic Field Stimulation over Parietal Cortex Enhances Somatosensory Detection in Humans
| Autor: | Paolo Profice, Guglielmo Foffani, Bryan A. Strange, Vanesa Soto-León, Virginia Céspedes, Carmen Carrasco-Lopez, Antonio Oliviero |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
0301 basic medicine
Adult Male medicine.medical_treatment Posterior parietal cortex Stimulation Context (language use) Somatosensory system 03 medical and health sciences 0302 clinical medicine Double-Blind Method Evoked Potentials Somatosensory Parietal Lobe medicine Humans Habituation Research Articles Cross-Over Studies General Neuroscience Electroencephalography Transcranial Magnetic Stimulation Electric Stimulation Median Nerve Transcranial magnetic stimulation 030104 developmental biology Magnetic Fields Somatosensory evoked potential Brain stimulation Female Psychology Neuroscience 030217 neurology & neurosurgery |
| Popis: | The role of neuronal oscillations in human somatosensory perception is currently unclear. To address this, here we use noninvasive brain stimulation to artificially modulate cortical network dynamics in the context of neurophysiological and behavioral recordings. We demonstrate that transcranial static magnetic field stimulation (tSMS) over the somatosensory parietal cortex increases oscillatory power specifically in the alpha range, without significantly affecting bottom-up thalamocortical inputs indexed by the early cortical component of somatosensory evoked potentials. Critically, we next show that parietal tSMS enhances the detection of near-threshold somatosensory stimuli. Interestingly, this behavioral improvement reflects a decrease of habituation to somatosensation. Our data therefore provide causal evidence that somatosensory perception depends on parietal alpha activity.SIGNIFICANCE STATEMENTArtificially increasing alpha power by placing a powerful magnetic field over the somatosensory cortex overcomes the natural decline in detection probability of a repeated near-threshold sensory stimulus. |
| Databáze: | OpenAIRE |
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