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What Is a Motor Threshold (MT)?

Motor Threshold (MT) is the minimum stimulation intensity required to produce a motor response in a target muscle with a 50% probability. Determining a patient's Motor Threshold allows clinicians to personalize treatment intensity, ensuring that TMS therapy is delivered safely and effectively.

 What Is Motor Threshold?

Motor Threshold (MT) refers to the lowest level of magnetic stimulation that can produce a measurable muscle response while stimulating the motor cortex.

Because every patient's brain responds differently to TMS, Motor Threshold is determined individually before treatment begins. The resulting value is then used to calculate the appropriate treatment intensity for stimulation sessions.

Why Is Motor Threshold Important?

Motor Threshold serves several important purposes:

  • Personalizes treatment for each patient
  • Supports safe delivery of TMS therapy
  • Helps ensure sufficient stimulation of the target brain region
  • Improves consistency between treatment sessions
  • Provides a standardized method for determining treatment intensity

Without determining Motor Threshold, it would be difficult to know how much stimulation is appropriate for a specific individual.