Transcranial Magnetic Stimulation (TMS)

What is Transcranial Magnetic Stimulation (TMS)?

Transcranial Magnetic Stimulation (TMS) uses a coil placed near the scalp to deliver brief, focused magnetic pulses that pass through the skull and activate nerve cells in targeted brain regions. It requires no anesthesia, no surgery, and no implanted devices — you sit in a chair during the session and can drive yourself home after. TMS was cleared by the FDA in 2008 for major depression and has since received clearances for OCD, anxious depression, and smoking cessation.

How does Transcranial Magnetic Stimulation (TMS) work?

The magnetic pulses generate small electrical currents in neurons just below the coil, nudging underactive brain circuits back into normal firing patterns. In depression, TMS is typically aimed at the left prefrontal cortex — an area that tends to be quieter than normal in people with depression. With repeated sessions, the stimulation appears to rebalance communication between the prefrontal cortex and deeper mood-regulating structures like the amygdala, producing lasting changes in how the brain regulates emotion.

What forms does Transcranial Magnetic Stimulation (TMS) come in?

Standard rTMS involves daily 20–40 minute sessions, 5 days per week, for 4–6 weeks (roughly 20–36 sessions). Theta burst stimulation compresses the same effect into 3-minute sessions, making it far more time-efficient. Accelerated TMS protocols deliver multiple sessions per day over a shorter period (e.g., Stanford's SAINT protocol: 10 sessions per day for 5 days). Deep TMS using H-coils is FDA-cleared for OCD and has broader depth of field than standard coils.

Where it comes from:

TMS was first demonstrated by Anthony Barker and colleagues in Sheffield, UK in 1985, when they showed that a magnetic coil held to the scalp could activate motor neurons and produce hand movements. Researchers quickly recognized the potential for psychiatric and neurological applications. After years of clinical trials, the FDA cleared TMS for treatment-resistant major depressive disorder in 2008, marking a turning point in non-drug brain treatment. It has since been cleared for OCD (2018), anxious depression (2021), and smoking cessation (2020).

What does Transcranial Magnetic Stimulation (TMS) help with?

• Treatment-resistant depression: TMS was specifically developed for people whose depression hasn't responded to antidepressants. By targeting the left prefrontal cortex — the part of the brain most consistently underactive in depression — repeated sessions help wake up sluggish emotional circuits. Response rates in people who've failed multiple medications are meaningfully better than adding another drug.
• Major depressive disorder (MDD): Even in people who haven't tried many medications, TMS produces remission in a significant portion of patients — comparable to a second antidepressant but without systemic side effects like weight gain or sexual dysfunction. It works particularly well when combined with therapy.
• OCD: Deep TMS using an H7 coil targets the medial prefrontal cortex and anterior cingulate — brain areas caught in the repetitive loops that drive OCD symptoms. FDA cleared deep TMS for OCD in 2018, and studies show meaningful reduction in compulsion and obsession severity after a course of treatment.
• Anxiety and PTSD: TMS applied to the right prefrontal cortex (which tends to be overactive in anxiety) can help dial down threat-response circuits. Research in PTSD shows reductions in hyperarousal, intrusive memories, and avoidance, with several protocols now specifically designed for trauma-related symptoms.
• Bipolar depression: TMS is used off-label for the depressive phase of bipolar disorder, often in people who can't tolerate mood stabilizers well or need additional support. Evidence is still building, but existing studies show a similar response profile to unipolar depression with low risk of triggering mania.
• Chronic pain: Stimulating the motor cortex or prefrontal regions can reduce the brain's amplification of pain signals, which is useful in conditions like fibromyalgia, neuropathic pain, and migraines. The effect is modest but meaningful for people who haven't responded to pain medications.
• Smoking cessation: High-frequency TMS targeting the prefrontal cortex and insula — a region tied to cravings — received FDA clearance for smoking cessation in 2020. Studies show significant reduction in cigarette consumption and craving intensity compared to sham treatment.
• Cognitive decline and memory: Preliminary research suggests TMS over the dorsolateral prefrontal cortex or parietal regions may improve working memory and slow cognitive decline in early Alzheimer's disease. This is an active area of research and not yet an established standard of care.
• Tinnitus: Low-frequency TMS targeted at auditory cortex areas can reduce the perceived loudness and distress of ringing in the ears. Results are variable and not every person responds, but for those with persistent tinnitus resistant to other treatments, it offers a non-drug option.
• Post-stroke rehabilitation: TMS can be used after stroke to either stimulate the damaged hemisphere or suppress the overactive healthy hemisphere — both strategies help the brain reorganize and recover lost motor or language function. It's most effective when combined with physical or speech therapy.

What can Transcranial Magnetic Stimulation (TMS) help prevent?

• Depression relapse (maintenance TMS sessions after successful acute treatment have shown significantly lower relapse rates compared to no maintenance therapy)
• Migraine frequency (preventive TMS protocols have demonstrated reduction in monthly migraine days in clinical trials)

Which foods are rich in Transcranial Magnetic Stimulation (TMS)?

1. Fatty fish (salmon, sardines, mackerel): Rich in omega-3 fatty acids, which support neuronal membrane health and reduce neuroinflammation — making brain cells more responsive to stimulation and supporting the mood-circuit changes TMS aims to produce.
2. Dark leafy greens (spinach, kale, Swiss chard): High in folate and magnesium, both critical for neurotransmitter synthesis (serotonin, dopamine) — the same systems TMS works to rebalance in depression and mood disorders.
3. Eggs: A top dietary source of choline, which the brain uses to make acetylcholine — a neurotransmitter important for learning, memory, and the neuroplasticity that TMS sessions are trying to encourage.
4. Blueberries and mixed berries: Rich in anthocyanins and other polyphenols that support BDNF (brain-derived neurotrophic factor) — a key growth protein that TMS is thought to upregulate, helping new neural connections form and stick.
5. Dark chocolate (70%+ cacao): Contains flavonoids that increase cerebral blood flow and support dopamine signaling, complementing TMS's effects on prefrontal cortex activity and mood regulation.

Practical Tips:

TMS is a clinical procedure, not a dietary compound — there is no food that contains it. However, a brain-supportive diet meaningfully enhances TMS outcomes by promoting the neuroplasticity that TMS sessions rely on. Research suggests patients following a Mediterranean-style diet rich in omega-3s, polyphenols, and B vitamins tend to consolidate TMS-driven brain changes more effectively. Staying well-hydrated and avoiding alcohol during a TMS course is also recommended, as alcohol disrupts cortical excitability and can blunt treatment response.

What are the side effects of Transcranial Magnetic Stimulation (TMS)?

• Scalp discomfort or tingling at the coil site: common in the first few sessions, usually fades as the course progresses
• Headache: mild, typically resolves within an hour post-session; over-the-counter pain relief is effective
• Facial muscle twitching during stimulation: a normal, transient response to the magnetic pulses
• Lightheadedness immediately after a session: usually brief; sitting for a few minutes after resolves it
• Fatigue: some people feel mentally tired after sessions, especially early in the course
• Seizure: rare (estimated risk under 0.1% per course in properly screened patients); risk is highest in people with pre-existing seizure disorders or seizure-threshold-lowering medications
• Hearing discomfort: the clicking sound of the coil can be loud; earplugs are provided as standard practice
• Hypomania or mood elevation: uncommon but reported, particularly in patients with underlying bipolar disorder; monitoring is recommended

Good to know:

TMS has an excellent safety profile overall — it has been used in hundreds of thousands of patients without the systemic side effects associated with antidepressants. The most commonly reported effects are mild and localized to the treatment site, and they typically improve within the first week of sessions as the brain adjusts to stimulation.

How much Transcranial Magnetic Stimulation (TMS) should you take?

• Recommended daily: Standard protocol: 10 Hz rTMS at 120% motor threshold, 3,000 pulses per session — 5 sessions per week for 4–6 weeks (20–36 total sessions). Theta burst stimulation (TBS): 600 pulses per session in approximately 3 minutes, same weekly frequency. Deep TMS: typically 18 Hz, 2-second trains, totaling ~1,980 pulses per session. Accelerated protocols (e.g., SAINT): 10 sessions per day for 5 days with 50-minute inter-session intervals — investigational and requires specialized clinic setup.
• Best time of day: Morning or midday sessions are generally preferred — some patients feel energized or mildly fatigued post-session, which is more manageable earlier in the day. Consistent session timing each day may support stable cortical rhythms.
• With or without food: Eating a light meal beforehand is fine and often recommended — arriving hungry can increase headache sensitivity. Avoid large, heavy meals immediately before as some people feel slightly lightheaded during early sessions.
• Time to effect: Initial mood improvements often noticed by week 2–3; meaningful clinical response typically emerges by week 4–6. Some patients, particularly with accelerated protocols, report improvement within days.
• How long to take it: An acute course is typically 4–6 weeks (20–36 sessions). After a successful response, maintenance TMS — monthly or quarterly booster sessions — significantly reduces relapse risk and is increasingly recommended as standard of care. Some patients complete a second acute course if symptoms return.