Depression can make the brain feel less like a single organ and more like a crowded room. Thought, mood, sleep, energy, memory, and motivation may all be affected at once. When medication or therapy has not brought enough relief, it is understandable to ask what a treatment such as Deep TMS is actually doing.
At Synergy NeuroPsychiatry, we believe that question deserves a clear answer. Deep TMS is an FDA-cleared, noninvasive treatment that may be considered for depression. It uses carefully timed magnetic pulses delivered outside the skull. It does not involve surgery, implanted electrodes, or sedation.
Still, the treatment is not magic, and the science does not support treating it that way. Brain networks are complex. Research can show meaningful patterns and group-level outcomes, but it cannot predict with certainty how any one person will respond.
Depression involves more than one brain region
Depression is often described as a mood disorder. That is true, but incomplete. Depression can affect concentration, sleep, appetite, energy, self-perception, and the ability to take part in daily life. It involves more than a simple period of sadness or low motivation, and symptoms can affect both mood and daily functioning.
The brain functions through networks. These networks connect regions involved in attention, emotional regulation, planning, memory, and response to stress. In depression, some patterns of communication within and between these networks may be altered. That does not mean there is one damaged spot that can simply be switched back on. It means treatment often requires a broader clinical view.
This is also why a diagnosis matters. Symptoms that resemble depression can overlap with anxiety, trauma-related symptoms, sleep disruption, medical conditions, substance use, or medication effects. A psychiatric evaluation can help us understand the whole picture before discussing options. For a closer look at how depression and anxiety frequently co-occur, see our post on Depression With Anxiety.
How magnetic pulses reach brain tissue
During Deep TMS, you sit in a treatment chair while a specialized helmet-shaped coil is positioned over your head. The device produces brief magnetic pulses. Those pulses pass through the scalp and skull, creating small electrical currents in underlying brain tissue.
This is the basic principle of transcranial magnetic stimulation. Magnetic fields can influence neuronal activity without requiring electrodes to enter the body. The distribution of that influence is not fixed or identical for every person. It is shaped by coil design, pulse settings, anatomy, and the electrical properties of different tissues. A modeling study of stimulation fields illustrates why those physical details matter (Wagner et al., 2014).
Deep TMS uses a form of coil designed to influence a broader volume of tissue than conventional figure-eight coil designs. “Deep” does not mean that a pulse travels to one precise hidden location while leaving everything else untouched. It refers to the shape and distribution of the magnetic field created by the coil. Reviews of H-coil technology describe how different coil configurations can be designed around distinct stimulation goals and anatomical considerations in work examining Deep TMS coil features (Harmelech et al., 2021).
Why brain networks matter in Deep TMS
A pulse is brief. Its possible effects are not limited to that instant.
Neurons communicate through electrical and chemical signals. Repeated stimulation may influence how readily certain circuits activate and how they coordinate with connected regions. This is often discussed in terms of neuroplasticity, the brain’s capacity to adapt in response to experience and repeated input.
That language should remain careful. We cannot look at one treatment session and declare that a particular network has been permanently corrected. Neuromodulation research continues to examine how stimulation parameters, brain physiology, and individual variability shape effects. A review of physiologically informed neuromodulation emphasizes the importance of matching stimulation approaches to brain state and biological context (Wendt et al., 2022).
For depression, Deep TMS is FDA-cleared under specific indications. We may discuss Deep TMS treatment when a careful evaluation suggests it is reasonable to consider. We also review your diagnosis, treatment history, current medications, symptoms, medical history, and practical needs. The device is part of care. It is not the whole of care.
What a course of treatment can look like
Deep TMS sessions are generally delivered in a series rather than as a one-time intervention. At each visit, the coil is positioned and pulses are administered according to the prescribed protocol. You remain awake and can return to usual activities afterward unless your clinician advises otherwise.
Before treatment begins, we discuss what sessions may feel like. Some people notice tapping or scalp discomfort during stimulation. Headache or local discomfort can occur. A more detailed discussion of TMS therapy side effects can help you prepare for a conversation about safety, comfort, and medical considerations.
We also review factors that may affect whether TMS is appropriate to discuss, including seizure history, implanted metal or electronic devices, medications, and other health conditions. This is not a formality. Safe treatment begins with accurate information.
This article is for general educational purposes only. It is not medical advice, a diagnosis, or a substitute for an individualized evaluation by a qualified clinician.
What the evidence can show
Clinical research can compare outcomes between groups receiving active treatment and groups receiving a sham procedure. It can measure changes in depressive symptoms over time. It can also help identify common side effects and refine treatment protocols.
The broader TMS literature has grown substantially over several decades, with increasing attention to differing stimulation approaches and psychiatric applications. A review of publication trends in psychiatric TMS documents that expanding field of investigation (Matsuda et al., 2021).
Research can provide useful evidence. It can support FDA clearance for particular uses. It can inform clinical discussions. But it does not turn an average study result into an individual forecast.
For example, preliminary research in adolescents with treatment-resistant depression explored dose and safety questions, while also underscoring the limits of early, small-scale work in a preliminary Deep TMS study (Thai et al., 2024). Findings in a specific group, with a specific protocol, do not automatically apply to every adult seeking care.
What the evidence cannot tell you
Evidence cannot tell us in advance exactly how you will feel after a particular number of sessions. It cannot replace a diagnosis. It cannot explain every aspect of a person’s depression, relationships, stressors, or prior treatment experience.
It also cannot answer the question, “Will this work for me?” with a promise. We can discuss what is known, what is uncertain, and what alternatives may be appropriate. For some people, the conversation begins with medication management, psychotherapy coordination, or a fuller diagnostic assessment. For others with a history of inadequate response, it may include treatment-resistant depression and whether an interventional option should be considered.
Deep TMS care in Portage and Kalamazoo
At Synergy NeuroPsychiatry, our care is physician-led and centered on the individual in front of us. Depression can be clinically complex, especially when symptoms overlap with anxiety, OCD, PTSD, medical concerns, or past treatment difficulties. We take time to understand that complexity.
If you are considering Deep TMS for depression, meeting with a psychiatrist in Portage can help clarify the questions that matter most: What is the diagnosis? What has been tried? What has helped, even partly? What risks or barriers should be considered? And what role, if any, could Deep TMS have in your care?
You can also learn more about our depression treatment options or contact our office to discuss an evaluation.
Ready to take the next step? Schedule a consultation with our team to talk through whether Deep TMS may be appropriate for your care.
If depression includes thoughts of harming yourself or feeling unable to stay safe, call or text 988 for immediate, confidential support through the 988 Suicide and Crisis Lifeline (988 Suicide and Crisis Lifeline, n.d.). If there is immediate danger, call 911 or go to the nearest emergency department.
Frequently asked questions
Is Deep TMS surgery?
Is Deep TMS surgery? No. Deep TMS is noninvasive. Magnetic pulses are delivered from a coil placed outside the head, and no electrodes are implanted.
Does Deep TMS directly fix one area of the brain?
Does Deep TMS directly fix one area of the brain? Not exactly. Deep TMS is intended to influence brain activity through magnetic stimulation, but depression involves interconnected networks rather than one isolated brain location. The relationship between stimulation, brain circuits, and symptoms remains an active area of research.
Is Deep TMS right for everyone with depression?
Is Deep TMS right for everyone with depression? No. Deep TMS is FDA-cleared for depression under specific indications, but it may not be appropriate for every person. A full psychiatric evaluation helps us determine which options are reasonable to discuss.
How do we decide whether to consider Deep TMS?
How do we decide whether to consider Deep TMS? We consider your diagnosis, symptoms, health history, medications, prior treatment response, safety factors, and treatment goals. The aim is not to rush toward a device. It is to make a thoughtful clinical decision together.
Works Cited
1. Wagner T, et al. Impact of brain tissue filtering on neurostimulation fields: a modeling study. https://pubmed.ncbi.nlm.nih.gov/23850466/
2. Harmelech T, et al. Deep TMS H7 Coil: Features, Applications & Future. https://pubmed.ncbi.nlm.nih.gov/34878347/
3. Wendt K, et al. Physiologically informed neuromodulation. https://pubmed.ncbi.nlm.nih.gov/34998239/
4. Matsuda Y, et al. Transcranial magnetic stimulation modalities for psychiatric disorders: Publication trends from 1985 to 2019. https://pubmed.ncbi.nlm.nih.gov/34677003/
5. Thai M, et al. Deep transcranial magnetic stimulation for adolescents with treatment-resistant depression: A preliminary dose-finding study exploring safety and clinical effectiveness. https://pubmed.ncbi.nlm.nih.gov/38484878/
6. 988 Suicide and Crisis Lifeline. https://988lifeline.org/
Disclaimer
This article is for educational purposes only and is not a substitute for individualized evaluation, diagnosis, or treatment from a qualified healthcare professional.