Transcranial Magnetic Stimulation

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Using magnetic fields to stimulate brain nerve cells, Transcranial Magnetic Stimulation (TMS) is a non-invasive therapy that lessens the symptoms of depression. The study participant is initially scanned using an fMRI machine to precisely identify the location of the brain region to be examined in TMS trials. Following the application of electrical stimulation to the participant's brain, either before or during the completion of a cognitive task, the effects of the stimulation on performance are assessed. Researchers can deduce that this particular area of the brain is essential for performing the activity if the presence of stimulation impairs the participant's ability to finish the task. The fundamental advantage of TMS is that it enables researchers to draw conclusions about how various brain areas influence concepts, feelings, and actions. TMS pulses cause the brain region to become inactive, and this inactivity is expected to have an impact on the research participant's responses. TMS is currently being used to study the emotional and cognitive brain regions as well as their roles in how people perceive intention and approach moral reasoning.

Different types

Magnetic force: The tesla is the measurement unit for magnetic force. The majority of TMS magnets generate 1.5T to 2T magnetic fields, similar to an MRI scanner. The magnetic field's surface area is significantly smaller in the TMS magnet than in an MRI due to its smaller size.

Rate of heartbeat : Each time the magnetic field activates and deactivates, a pulse is generated. Pulses per second are used to measure frequency (which is measured in hertz, abbreviated Hz). Low-frequency pulses at 1 Hz or high-frequency pulses at 5 and 10 Hz can be used with TMS (5 pulses per second to 10 pulses per second). The term "repetitive TMS" describes TMS that uses repeated pulses (rTMS).

Patterns of pulse: A magnet's force is measured in terms of teslas. The majority of TMS magnets produce magnetic fields with a strength of 1.5T to 2T, similar to an MRI scanner. The surface area of the magnetic field is significantly smaller in the TMS magnet than in an MRI due to its much lower size.

Pulse frequency : Every time the magnetic field turns on and off, a pulse is generated. It is expressed as a number of pulses per second (which is measured in hertz, abbreviated Hz). TMS can employ either low-frequency pulses at 1 Hz or high-frequency pulses at 5 Hz and 10 Hz (5 pulses per second to 10 pulses per second). TMS that uses repeated pulses is known as repetitive TMS (rTMS).