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Publication Detail
Introduction to Nonconvulsive Brain Stimulation: Focus on Transcranial Magnetic Stimulation
  • Publication Type:
    Chapter
  • Authors:
    Hamada M, Rothwell JC
  • Publication date:
    05/06/2015
  • Pagination:
    151, 164
  • ISBN-13:
    9781118568293
  • Status:
    Published
  • Book title:
    Brain Stimulation: Methodologies and Interventions
Abstract
Transcranial Magnetic Stimulation (TMS) employs the principle of electromagnetic induction, first discovered by Michael Faraday, in which a changing magnetic field gives rise to a companion electric field that induces electrical currents in nearby conductive structures. A large pulse of current in the external stimulating coil generates a rapidly changing magnetic field that rises to, and falls from, 1 Tesla or more within 1 ms. Although single pulses of TMS activate axons of neurons in the brain, the effects are much more complex than occur after stimulation of peripheral nerves. A number of neuroimaging methods are available to detect and measure the effect of TMS on an area of cortex. Electroenchephalography (EEG) is the best method to record cortical activity with high temporal resolution. Two new techniques that may be able to modulate brain activity noninvasively in human brain are high-field static magnets and pulsed ultrasound stimulation.
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