Magnetoencephalography in clinical practice

Abstract

Magnetoencephalography (MEG) is a neurophysiological technique that measures the magnetic fields associated with neuronal activity in the brain. It is closely related but distinct from its counterpart electroencephalography (EEG). The first MEG was recorded more than 50 years ago and has technologically evolved over this time. It is now well established in clinical practice particularly in the field of epilepsy surgery and functional brain mapping. However, underutilization and misunderstanding of the clinical applications of MEG is a challenge to more widespread use of this technology. A fundamental understanding of the neurophysiology and physics of MEG is discussed in this article as well as practical issues related to implementation, analysis, and clinical applications. The future of MEG and some potential clinical applications are briefly reviewed.

Aplicação das ondas cerebrais no contexto da neuropsiquiatria clínica: uma revisão integrativa

“…O EEG é uma técnica neurofisiológica bem estabelecida, sendo usada para registrar o potencial elétrico gerado pela atividade cerebral com alta precisão temporal, seja em repouso ou durante o desempenho de uma determinada tarefa 5,7 A captação do sinal foi realizada usando eletrodos de superfície de Ag/AgCl posicionados conforme sistema de padrão internacional, com eletrodos de referência nos ouvidos dos pacientes, impedância abaixo de 10kΩ e com dados contínuos filtrados usando passa-banda de 0,5 a 50Hz.…”