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Transcranial Magnetic Stimulation(TMS). By: Brandon Brunelle. What is it. Trancranial Magnetic Stimulation is a method used to treat migrains, migrain “aura”, and even depression 10-20% of people suffer from migrains alone Relatively new concept Not yet widely used or accepted by insurance.

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Presentation Transcript

What is it l.jpg
What is it

  • Trancranial Magnetic Stimulation is a method used to treat migrains, migrain “aura”, and even depression

  • 10-20% of people suffer from migrains alone

  • Relatively new concept

  • Not yet widely used or accepted by insurance


Background l.jpg
Background

  • The skull acts as a shield

  • Different parts of the brain have different functionality

  • Brain is made up of neurons and neuron clusters that are electrically excitable


The concept l.jpg
The Concept

  • Migrains are associated with high neuron activity

  • Depression associated with low neuron activity.

  • Use a magnetic coil to modulate neuron activity

  • Coil is placed on scalp in a desired location

  • Magnetic field penetrates to a depth of about 3cm

  • Approximately three times the normal neuron excitation stimulation is needed to modulate


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Components

  • 24V voltage source/high voltage module

  • Bipolar condensors

  • Snubber circuit

  • Control circuits

  • Copper coil


High voltage module l.jpg
High voltage module

  • Delivers an adjustable positive voltage that is highly stable

  • Custom 10 watt and high voltage module

  • Charges condensers in about 23 seconds

  • High voltage double pole inverter


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Condensors

Control Circuit

  • Metal impregnated polypropylene dielectric with 1500volt insulation.

  • Used to deliver high current discharges in about 100uS.

  • Allows for selection of polarity

  • Amplitude adjustment


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Snubber Circuit

  • Uses two Thyristor to deliver current to coil in order to provide positive and negative current

  • 1800V insulation

  • Transfers peak current of 8000A for 10ms

  • Time derivatives were 250A/uS, 1000V/uS

  • Circuit contains about a 4.3uS lag time causing polarity to undesirably change in coil

  • Snubber circuit contained an R-C setup in paralell with thrystors to prevent polarity change


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Copper Coil

  • Coil has a diameter of 11 cm

  • Made of flat enameled copper wire

  • Insulated to prevent coil unwinding


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Benefits

  • Non invasive

  • Relatively quick and easy

  • Does not cause any sort disfunctionality

  • Would not cost a lot

  • No chemical imbalances that drugs and medication can cause

  • 74% success rate after two hours in test


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Sources

  • Design and Construction of a Portable Transcranial Magnetic Stimulation (TMS) Apparatus for Migraine Treatment: Anne Beuter, Isabelle Lagroye, Bernard Veyret University of Bordeaux 1,IMS, Site ENSCPB,UMR CNRS 5218,16, Avenue Pey Berland, 33607, Pessac Cedex, France

  • http://intra.ninds.nih.gov/images/Research_Images/wassermanne@ninds.nih.gov.jpg

  • http://www.mclean.harvard.edu/patient/adult/tms.php

  • http://en.wikipedia.org/wiki/Transcranial_magnetic_stimulation

  • http://www.nami.org/Content/ContentGroups/Helpline1/Transcranial_Magnetic_Stimulation_%28rTMS%29.htm