TRANSCRANIAL MAGNETIC STIMULATION VECTOR FIELD CO-REGISTRATION WITH MAGNETIC RESONANCE IMAGES.

• Grant number: 09/09064-6
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: October 01, 2009
• End date: December 31, 2011
• Field of knowledge: Physical Sciences and Mathematics - Physics
• Principal Investigator: Oswaldo Baffa Filho
• Grantee: Victor Hugo de Oliveira e Souza
• Host Institution: Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto (FFCLRP). Universidade de São Paulo (USP). Ribeirão Preto , SP, Brazil

Abstract

Due to advances in research in neuroscience, the interest in non-invasive techniques for interaction with the brain has been increased. In this context, transcranial magnetic stimulation (TMS) is becoming increasingly important. TMS is based on the emission of magnetic pulses in order to cause depolarization in the cerebral cortex eliciting the spreading of electrical signals in the brain. Another important technique used in neuroscience is magnetic resonance imaging (MRI), which allow the localization of brain structures. MRI used concomitantly with computer graphics tools allows the knowledge of the distribution of the magnetic field produced by the coil of stimulation in the region of interest, through co-registration of maps of the TMS magnetic fields and MRI images. In order to stimulate specific areas, a considerable focalization of the electric field is required and butterfly coils are used, considered to be better than the circular coils. It's essential to know the distribution of the vector magnetic field produced by the coil, to evaluate the contributions of its three components, which depending on its magnitude can stimulate unwanted areas of the cortical region and influence the results obtained. This work could improve the accuracy of TMS.

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

SOUZA, VICTOR HUGO; MATSUDA, RENAN H.; PERES, ANDRE S. C.; AMORIM, PAULO HENRIQUE J.; MORAES, THIAGO F.; SILVA, JORGE VICENTE L.; BAFFA, OSWALDO. Development and characterization of the InVesalius Navigator software for navigated transcranial magnetic stimulation. JOURNAL OF NEUROSCIENCE METHODS, v. 309, p. 109-120, NOV 1 2018. (09/09064-6, 12/11937-0)