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Cortical inhibition and excitation by bilateral transcranial alternating current stimulation
- Source :
- Restorative neurology and neuroscience 33 (2015): 105–114. doi:10.3233/RNN-140411, info:cnr-pdr/source/autori:Cancelli, Andrea; Cottone, Carlo; Zito, Giancarlo; Di Giorgio, Marina; Pasqualetti, Patrizio; Tecchio, Franca/titolo:Cortical inhibition and excitation by bilateral transcranial alternating current stimulation/doi:10.3233%2FRNN-140411/rivista:Restorative neurology and neuroscience/anno:2015/pagina_da:105/pagina_a:114/intervallo_pagine:105–114/volume:33, Brain Stimulation, Vol 8, Iss 2, Pp 340-341 (2015)
- Publication Year :
- 2015
- Publisher :
- IOS Press, Amsterdam , Paesi Bassi, 2015.
-
Abstract
- Purpose: Transcranial electric stimulations (tES) with amplitude-modulated currents are promising tools to enhance neuromodulation effects. It is essential to select the correct cortical targets and inhibitory/excitatory protocols to reverse changes in specific networks. We aimed at assessing the dependence of cortical excitability changes on the current amplitude of 20 Hz transcranial alternating current stimulation (tACS) over the bilateral primary motor cortex. Methods: We chose two amplitude ranges of the stimulations, around 25 ?A/cm2 and 63 ?A/cm2 from peak to peak, with three values (at steps of about 2.5%) around each, to generate, respectively, inhibitory and excitatory effects of the primary motor cortex. We checked such changes online through transcranial magnetic stimulation (TMS)-induced motor evoked potentials (MEPs). Results: Cortical excitability changes depended upon current density (p = 0.001). Low current densities decreased MEP amplitudes (inhibition) while high current densities increased them (excitation). Conclusions: tACS targeting bilateral homologous cortical areas can induce online inhibition or excitation as a function of the current density.
- Subjects :
- Adult
Male
superficial current density
medicine.medical_treatment
Biophysics
Transcranial Direct Current Stimulation
Inhibitory postsynaptic potential
lcsh:RC321-571
Developmental Neuroscience
medicine
Humans
lcsh:Neurosciences. Biological psychiatry. Neuropsychiatry
Transcranial alternating current stimulation
neuronavigation
Chemistry
Neuromodulation
General Neuroscience
Motor Cortex
Neural Inhibition
motor cortex (M1)
Middle Aged
Evoked Potentials, Motor
Transcranial Magnetic Stimulation
Neuromodulation (medicine)
Transcranial magnetic stimulation
Neurology
Excitatory postsynaptic potential
Female
personalized electrode
Cortical inhibition
Neurology (clinical)
Primary motor cortex
Neuroscience
Current density
transcranial alternating current stimulation (tACS)
Excitation
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- Restorative neurology and neuroscience 33 (2015): 105–114. doi:10.3233/RNN-140411, info:cnr-pdr/source/autori:Cancelli, Andrea; Cottone, Carlo; Zito, Giancarlo; Di Giorgio, Marina; Pasqualetti, Patrizio; Tecchio, Franca/titolo:Cortical inhibition and excitation by bilateral transcranial alternating current stimulation/doi:10.3233%2FRNN-140411/rivista:Restorative neurology and neuroscience/anno:2015/pagina_da:105/pagina_a:114/intervallo_pagine:105–114/volume:33, Brain Stimulation, Vol 8, Iss 2, Pp 340-341 (2015)
- Accession number :
- edsair.doi.dedup.....47fabac657a02aab3712d1e3d57b2454
- Full Text :
- https://doi.org/10.3233/RNN-140411