Psychiatry: treatments
rTMS & other neuromodulation
Neuromodulation treatments, such as repetitive transcranial magnetic stimulation (rTMS), change brain activity with magnetic or electrical energy without medicines. Psychiatrists need to know where they fit, mainly for depression that has not responded to standard treatment.
Depth by stage, Pre-U → Consultant (details)
What is it?
Neuromodulation means directly nudging the activity of brain circuits. The best-known form in psychiatry is rTMS, where a magnetic coil held against the scalp sends rapid pulses that stimulate a small area of the brain's surface, usually in the front of the brain linked to mood. The patient is awake, needs no anaesthetic and can go home afterwards.
A typical rTMS course runs most weekdays for several weeks, though newer accelerated schedules exist. It is mainly used for depression that has not improved with medicines. Other techniques include transcranial direct current stimulation (tDCS), deep brain stimulation (DBS, surgically implanted, used in very selected cases) and vagus nerve stimulation.
Availability in Malaysia is growing but limited, mostly in larger public and private centres. Evidence, cost and access all shape when a psychiatrist recommends it.
Why does a psychiatrist need it?
Patients and families increasingly ask about brain-stimulation treatments they read about online. A psychiatrist must explain honestly what the evidence shows, who is suitable, what the risks are (rare seizures, headache) and how these treatments compare with medicines, therapy and ECT.
What level is expected at each stage?
Scale: 1. Aware → 2. Understands → 3. Applies → 4. Masters / Teaches. What the levels mean.
- Pre-UNot expected
- Pre-clinicalNot expected
- ClinicalAwareHas heard of rTMS as a treatment option for depression.
- HousemanshipNot expected
- Medical officerAwareAware of local availability and basic indications when referring patients.
- Psych traineeUnderstandsUnderstands mechanisms, evidence, indications and safety, and can counsel patients.
- Specialist / consultantAppliesRefers or delivers treatment appropriately; those running a service apply it hands-on and audit outcomes.
What are the key topics?
rTMS
- Principle: electromagnetic induction creates small currents in the cortex
- Common targets such as the left dorsolateral prefrontal cortex for depression
- High-frequency versus low-frequency stimulation; theta-burst protocols
- Motor threshold measurement to set the dose
- Course length and maintenance sessions
- Contraindications such as metal implants near the coil and seizure risk factors
Other techniques
- tDCS: weak direct current through scalp electrodes; research and limited clinical use
- Deep brain stimulation for very treatment-resistant OCD or depression in specialised centres
- Vagus nerve stimulation as an adjunct in chronic depression
- Magnetic seizure therapy as an experimental alternative to ECT
Evidence and place in treatment
- Effectiveness compared with placebo (sham) stimulation
- Comparison with ECT: generally less effective for the most severe depression but fewer memory effects
- Use in other conditions under research (OCD, auditory hallucinations, addiction)
- Cost, access and patient preference
Safety and practice
- Side effects: scalp discomfort, headache, rare seizures
- Screening checklists before treatment
- Consent and realistic expectations
- Combining with medicines and psychotherapy
How is it learned and assessed?
- Mentioned in undergraduate teaching on depression treatment
- Covered in MMed (Psychiatry) and MRCPsych written papers as part of physical treatments and evidence appraisal
- Observation in centres that offer rTMS during training
- Ongoing learning through journals and CPD as indications expand
Typical textbooks and resources
- Shorter Oxford Textbook of Psychiatry — physical treatments chapter
- The Maudsley Prescribing Guidelines in Psychiatry — treatment-resistant depression sections
- NICE interventional procedures guidance on rTMS for depression (UK)
- Royal College of Psychiatrists position statements on neuromodulation
Titles are widely used examples; editions change. Use university libraries or legitimate purchases.
Common questions
Is rTMS the same as ECT?
No. rTMS uses magnetic pulses to stimulate a small area of the brain while the patient is awake, without causing a seizure. ECT deliberately induces a brief seizure under general anaesthesia. ECT is generally more powerful for severe depression; rTMS has fewer memory side effects.
Is rTMS available in Malaysia?
It is offered in some public and private centres, mainly in larger cities. Availability and cost vary, so patients usually discuss it with their psychiatrist, who can advise whether it is suitable and where it is provided.