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      Effects of TMS coil geometry on stimulation specificity.

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          Abstract

          Transcranial magnetic stimulation has become an established tool in experimental cognitive neuroscience and has more recently been applied clinically. The current spatial extent of neural activation is several millimeters but with greater specificity, transcranial magnetic stimulation can potentially deliver real time feedback to reinforce or extinguish behavior by exciting or inhibiting localized neural circuits. The specificity of transcranial magnetic stimulation is a function of the stimulation coil geometry. In this paper, a practical multilayer framework for the design of miniaturized stimulation coils is presented. This framework is based on a magnet wire fabricated from 2500 braided ultrafine wires. Effects of coil bending angle on stimulation specificity are examined using realistic finite element method simulations. A novel stimulation coil with one degree of freedom is also proposed that shows improved specificity over the conventional fixed coils. This type of coil could be potentially used as a feedback system for a bidirectional brain machine interface.

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          Author and article information

          Journal
          Annu Int Conf IEEE Eng Med Biol Soc
          Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference
          Institute of Electrical and Electronics Engineers (IEEE)
          2375-7477
          2375-7477
          2010
          : 2010
          Affiliations
          [1 ] McGill University, Department of Electrical Engineering, Montreal, Quebec, CANADA. mehran.talebinejad@mail.mcgill.ca
          Article
          10.1109/IEMBS.2010.5626840
          21096368
          b10f4fa5-fcea-4d6c-910b-143a775b0d30
          History

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