TRANSCRANIAL MAGNETIC STIMULATION (TMS) DEVICE

摘要

Transcranial magnetic stimulation (TMS) is a magnetic method used to stimulate small regions of the brain. During a TMS procedure, a magnetic field generator, or coil, is placed near the head of the person receiving the treatment. The coil produces small electric currents in the region of the brain just under the coil via electromagnetic induction. The coil is connected to a pulse generator, or stimulator, that delivers electric current to the coil. Instead of using coil of figure of 8 type butterfly coil, I have used electromagnet with solid iron core. The iron core increases the magnetic field thousands of times and leads to diffuse stimulation of brain tissue. The specifications of the magnet are: Diameter: 65 mm Thickness: 35 mm Power: 1000 gauss Current: 340 mamps Wattage: 8.2 Power Supply: 24 volts AC Connector: Two Pole Type The magnet has a plastic holder for holding to variety of places on the brain. The power supply of the magnet is a 24 Volts AC power Supply with variable frequency from 0-99 Hz achieved by a PWM frequency generator. By placing the magnet on various places of the brain and giving variable frequency of the current, a variety of effects can be produced on the brain. By giving a frequency of 50 hz the brain tissue can be stimulated and by giving 5 hz frequency the brain tissue can be inhibited.