How TMS Works
Transcranial magnetic stimulation uses focused magnetic pulses to reach specific brain circuits. This page walks through the whole process — from mapping to what you feel in the chair.
Magnetic pulses and neural pathways
A treatment coil generates brief magnetic pulses. Magnetic fields pass through skin and bone without being blocked, so the pulse reaches a shallow, targeted region of the brain. There, it induces a small electrical current that prompts nerve cells to fire.
The regions targeted in depression treatment are part of networks that help regulate mood, motivation, and emotional response. Repeated stimulation is intended to help those networks communicate more effectively.
Positioned over the mapped treatment area
A brief field passes painlessly through the scalp and skull
Neurons in the targeted region are stimulated
Connected mood-regulating pathways are activated
Repetition is what allows lasting change to build
Why repetition matters
Neuroplasticity is the brain's ongoing ability to reorganize its own connections. Patterns that fire together strengthen over time. TMS is thought to work with this property rather than around it — which is why a single session isn't the point.
- Each session provides stimulation to the same mapped target
- Change accumulates across a course of treatment, not in one visit
- Most protocols involve short sessions several days a week for several weeks
- Your provider monitors symptoms throughout and adjusts the plan
Finding your target and dose
Before treatment begins, your provider locates the treatment area and determines your motor threshold — the lowest pulse strength that produces a small response, usually a slight twitch in the hand. Your treatment level is set relative to that measurement, so the dose is individual to you, not a generic setting.
What patients actually feel
- A clicking sound with each pulse — earplugs are provided
- A tapping or knocking sensation on the scalp
- Mild scalp tenderness or a dull headache, most often in the first week
- No sedation, no anesthesia, no loss of awareness
- Ability to read, listen to music, or simply rest
- No downtime — most people return straight to their day
What Does an EXOMIND Session Feel Like?
The treatment applicator delivers magnetic pulses while you relax in the treatment chair. Some patients describe a tapping sensation at the treatment area.
Screening and contraindications
TMS has a well-established safety profile, but it isn't right for everyone. Screening happens before treatment and covers, among other things:
- Metallic implants or devices in or near the head
- Cochlear implants, aneurysm clips, stents, or implanted stimulators
- A history of seizures or epilepsy, or conditions that lower seizure threshold
- Certain medications that affect seizure threshold
- Pregnancy or the possibility of pregnancy
- Significant neurological or unstable medical conditions
Bring your full medication list and implant history to your consultation. If TMS isn't safe or appropriate for you, we'll say so directly.
In the United States, EXOMIND is intended for the treatment of Major Depressive Disorder in adult patients who have failed to achieve satisfactory improvement from prior antidepressant medication in the current episode. Any use outside of that indication is considered off-label and is offered on a cash-pay basis, based on provider judgment and emerging research. Off-label uses are not FDA-cleared indications. Individual results vary. TMS is not a cure, and no outcome is guaranteed. This page is patient education, not medical advice. Never start, stop, or change a medication based on information from a website. Medication decisions should always be made with your prescribing clinician.
Related reading: TMS for depression · EXOMIND TMS · TMS vs antidepressants
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