The article explains that TMS is an outpatient option for depression that may help when other treatments fall short, distinguishing symptom response from remission.
Does TMS work? An honest guide to response and remission in Minnesota
Transcranial magnetic stimulation (TMS) can help some people with depression, particularly when medication, talking therapy or both have not brought enough improvement. It is not a guaranteed treatment, and the results are different from person to person.
For people considering TMS in Minnesota, it can be useful to understand the language used in research and clinic discussions. Two terms come up often: response and remission. They sound similar, but they describe different levels of improvement.
TMS uses magnetic pulses applied to targeted areas of the brain involved in mood regulation. It is an outpatient treatment and does not involve surgery or anaesthetic. A standard course is often around 36 weekday sessions, usually spread over six to nine weeks, although an individual plan may differ.
What does “response” mean?
In TMS studies, a response usually means that a person’s depression symptoms have reduced substantially from where they started.
Researchers commonly measure symptoms using structured questionnaires and clinical rating scales. A person may be described as having responded when their score falls by around half on the scale used in that study. The exact measure and threshold can vary, which is one reason that outcome figures are not always directly comparable.
A response can be meaningful even when depression has not fully gone away. For example, someone might notice that they are:
- Getting out of bed more easily
- Able to concentrate for longer
- Less overwhelmed by low mood or negative thoughts
- Returning to work, study, family life or hobbies
- Sleeping or eating more regularly
- Finding it easier to use skills learned in therapy
Response does not necessarily mean every symptom has lifted. A person may still have difficult days, lower energy, anxiety, sleep problems or remaining depressive symptoms. However, a substantial reduction in symptoms can still make daily life more manageable.
What does “remission” mean?
Remission generally means that depression symptoms have reduced to a low level, often below a set cut-off on a clinical rating scale.
In practical terms, remission may mean that a person no longer meets the usual symptom threshold for a current depressive episode. They may feel well, or close to their usual level of functioning, for a period of time.
Remission is a stronger outcome than response. Someone can respond to TMS without reaching remission, while a person in remission will generally also be considered a responder.
It is important to remember that remission does not promise that depression will never return. Depression can be recurrent, and some people need ongoing support after a successful course of TMS. This may include medication, psychotherapy, lifestyle support, follow-up appointments or, where appropriate, a further course or maintenance treatment plan.
What published TMS trials report
Published clinical trials of TMS for major depressive disorder generally show that some participants experience a significant reduction in depressive symptoms, and some reach remission. These outcomes have been seen particularly in people whose depression has not improved sufficiently with antidepressant medication.
TMS was cleared by the US Food and Drug Administration (FDA) for major depressive disorder in 2008. In 2021, FDA clearance was expanded to include depression with comorbid anxiety. Clearance does not mean that every patient will benefit. It means the treatment has been reviewed for a specific use, based on the available evidence and regulatory standards.
When reading reported response or remission rates, it is worth looking beyond a single headline figure. Trials may differ in important ways, including:
- The type of TMS protocol used
- How severe participants’ depression was at the start
- How many previous treatments had not helped
- Whether people continued medication or therapy
- The symptom scale used to define response and remission
- How long outcomes were followed after treatment
- Whether results came from a tightly controlled trial or routine clinical practice
Because of these differences, there is no single percentage that can reliably predict what will happen for one person in Minnesota.
Research findings are useful for setting expectations, but they cannot replace an individual assessment. A clinician should discuss whether TMS is appropriate, what protocol they recommend, how progress will be monitored and what options may be considered if improvement is limited.
Why individual TMS results vary
Depression is not one identical condition. Two people with the same diagnosis may have very different symptoms, medical histories, stressors and treatment experiences. That helps explain why TMS results vary.
Factors that may influence outcomes include the nature and duration of a person’s depression, previous treatment history and whether there are co-occurring mental or physical health conditions. Anxiety, sleep disruption, substance use, chronic pain and major life pressures can all affect how someone feels during treatment and how recovery unfolds.
Treatment delivery also matters. TMS involves placing a treatment coil in a specific position on the scalp and delivering a prescribed pattern of magnetic pulses. Clinics use established protocols, but plans may be adjusted by the treating team where clinically appropriate. Attendance is important because TMS is delivered as a course rather than a one-off appointment.
People can also improve at different points in a course. Some notice changes early, while others report gradual improvement later on. Others may complete treatment with little or no benefit. Honest consent should include that possibility.
A clinic should assess progress rather than assuming every course is working. This may involve regular symptom questionnaires, discussions about daily functioning and review of side effects. If symptoms worsen, suicidal thoughts develop or safety concerns arise, prompt clinical support is important.
What TMS feels like during treatment
During a session, people are awake and seated. They may hear clicking sounds and feel tapping or knocking sensations on the scalp. The treating team usually works with the person to find a tolerable stimulation level.
The most common side effects are scalp discomfort and headache. These are usually temporary. Seizure is a rare risk, which is why screening for relevant health history, medication use and other safety factors is an important part of TMS assessment.
TMS is generally delivered on weekdays, and regular attendance can be demanding. Before beginning, it may help to consider travel, work responsibilities, childcare and other practical arrangements for several weeks of appointments.
Questions to ask a Minnesota TMS clinic
Minnesota has a broad range of listed providers. TMS Therapy Minnesota currently lists 136 published clinics, including multiple listings in Edina, Saint Paul, Maple Grove, Duluth, Mankato, Burnsville, Stillwater, Maplewood, Rochester, Minnetonka, Baxter and Woodbury.
When comparing options, consider asking:
- Am I a suitable candidate for TMS, and why?
- What diagnosis and symptoms are you treating?
- Which TMS protocol do you recommend?
- How will you measure response during the course?
- What would count as remission in your practice?
- What happens if I do not improve enough?
- Will I continue medication or therapy during treatment?
- What side effects should I report straight away?
- Does my insurance plan require prior authorisation?
Insurance coverage depends on the plan, diagnosis, treatment history and provider arrangements. Carriers commonly seen in Minnesota include Blue Cross Blue Shield of Minnesota, HealthPartners, Medica, UCare, Aetna, Cigna, Minnesota Medical Assistance (Medicaid), and Medicare, including Advantage plans. It is sensible to confirm coverage and any authorisation requirements directly with both the insurer and clinic before starting.
Getting help in Minnesota
Use the TMS Therapy Minnesota clinic listings to explore local providers, the insurance guide to understand coverage questions, and the contact page for help using the directory.
This article is educational information, not medical advice.
This page is informational and is not medical advice.