Transcranial Magnetic Stimulation (TMS) was first introduced in 1985 by Dr. Anthony Barker and his team in Sheffield, England. Originally developed as a non-invasive tool to stimulate the motor cortex, the technology used brief magnetic pulses to induce electric currents in the brain, enabling researchers to explore the functioning of specific neural circuits. Early applications were primarily diagnostic, helping neurologists map motor pathways and assess brain connectivity.
By the late 1990s and early 2000s, researchers began exploring the therapeutic potential of TMS. Studies showed that repeated sessions of stimulation (rTMS) could modulate neural activity in ways that might alleviate symptoms of depression, particularly in patients who had not responded to medication. In 2008, the FDA cleared the first TMS device for treatment-resistant depression, marking a major milestone that helped bring TMS into clinical psychiatry.
Since then, TMS has gained widespread recognition as a safe, effective, and well-tolerated treatment for a growing number of conditions. Multiple studies and real-world outcomes have demonstrated its efficacy in depression, obsessive-compulsive disorder (OCD), and smoking cessation, with ongoing research into anxiety, PTSD, chronic pain, and neurodegenerative disorders. The field has also seen advances in precision targeting, stimulation protocols, and device portability.
Despite its promise, adoption of TMS remained limited for years due to high equipment costs, complexity of use, and the logistical burden of multi-week treatment regimens. Clinics struggled with long appointment schedules, and patients were often deterred by the need for daily visits over several weeks—limiting access to the very populations who might benefit most.
Now, a new wave of innovation is transforming TMS. Emerging technologies are making it easier than ever to deliver brain stimulation that’s faster, more scalable, and accessible to more people. At Ampa, we’re proud to be at the forefront of this next chapter in TMS — expanding its reach and reimagining what’s possible in mental health care.

TMS uses powerful, focused magnetic field pulses to stimulate specific target circuits within the brain. While older brain stimulation techniques required surgery, TMS is completely non-invasive. It was first invented in 1985 as a brain research tool. Later discoveries showed that TMS could also be used as a treatment for depression and other psychiatric and neurological conditions. Today, over 100,000 people a year safely undergo TMS treatment in countries all over the world.
A TMS system includes a power unit that generates electrical pulses. These electrical pulses are transformed into magnetic pulses via a stimulation wand, sometimes known as a magnetic inductor or ‘coil.’ During treatment, the coil is positioned carefully on the scalp, just over the target brain circuit. It generates magnetic pulses that are as strong as the field in an MRI scanner, but focused into an area that can be as small as a coin. These pulses pass harmlessly through the skull to activate the brain tissue underneath.
The brain activation of TMS is both powerful and precise. When the TMS coil is placed over the brain’s ‘motor cortex’ (the area responsible for controlling body movements), the pulses can stimulate visible movements of the hands and feet. Healthcare providers commonly use these movements to calibrate the TMS intensity before a course of treatment. The calibration ensures that the stimulation intensity will be strong enough to activate the brain during treatment sessions later on.
For therapeutic TMS, the coil needs to be positioned over areas of the brain that are involved in ‘cognitive control’: our ability to self-regulate our thoughts, behavior, and emotion. These brain areas tend to become underactive in depression, anxiety, and other mental health conditions. TMS re-activates the ‘circuitry of resilience’, by stimulating these regions with hundreds of magnetic pulses per session. A full treatment course of 20-40 sessions re-strengthens the connections in these brain regions. Self-control returns, emotions become manageable once again, and depression and anxiety fade away.
Every person’s brain has the ability to change and re-wire its own circuits through lived experience. This capacity for change is called ‘neuroplasticity.’ By stimulating circuits over and over again, TMS activates the mechanisms of neuroplasticity. As the brain rewires its own circuits for emotion regulation, it becomes possible to emerge from the state of depression—even if there has been no relief for many years.
The Ampa One system is FDA-cleared for treatment-resistant depression (TRD). TMS is also FDA-cleared for treating major depressive disorder (MDD) and obsessive-compulsive disorder (OCD) in adults. Research shows that TMS may be effective in reversing specific anxiety disorders and PTSD symptoms.
The Ampa One system is designed to be powerful and precise, yet simple and easy to use. With Ampa One, your provider can be sure that every pulse of stimulation is delivered exactly where it’s needed. By combining new technology and new treatment techniques, the Ampa One system enables your provider to deliver the most advanced care possible. With modern techniques and technology, TMS is now more powerful than ever—and within reach for anyone who needs it.
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