Biophysica Incorporated

Phone: 416-784-0463 or Toll Free 1-800-488-2032 from Canada, US and Territories -or- E-mail:


Transcranial Magnetic Stimulation

From article in Scientific American Sept 2003

Biophysica’s portable repetitive Transcranial Magnetic Stimulator (TMS) is a form of Deep Brain Stimulation. TMS is a powerful highly effective non-invasive pulsed magnetic stimulator with a measurable range extending beyond 12 “(30 cm).  Biophysica’s TMS emits frequencies from 1Hz to above 50Hz using our internal oscillator and a much wider range using the external pulse source (such as one of our frequency generators). This includes all the brain wave frequencies, especially Alpha and Theta Waves and 40Hz. Output waveform is biphasic (both positive and negative polarity). Pulse repetition frequency is adjustable by user.   Two models are available  Model 1 is mounted on an anglepoise movable microphone arm and Model 2 is in a small box upon which the client’s head can rest and which emits Infra-red pulses know to be helpful in Dementia, Alzheimers and Memory Loss see

Our 7 minute TMS video by Dr Stewart can be seen

Mayo Clinic report, Dec 2009

Click here for our magnetic therapy page

Click here for price and ordering

TMS is used in many different areas of research and therapeutics including:

  • Cognitive Neuroscience – in the investigation of learning, memory, creativity, speech, hearing, visual, perception and functional connection, cognitive enhancement.

  • Psychiatry – to influence specific brain function within the dorsolateral prefrontal cortex  To relieve anxiety, depression, bulemia (bulimia),schizophrenia and depersonalization as a better alternative to Electric Shock Treatment also called ECT.

  • Neurophysiology – used in the stimulation of the peripheral and central nerve pathways.  Eliciting motor evoked potentials to advanced brain mapping research techniques.

  • Rehabilitation – used in the promotion of muscle recovery and the relief of pain and nerve spasticity.

  • Effective, safer, less costly option to ECT and augmentation to antidepressants at

The following conditions have been successfully treated (some conditions need twice daily treatment) by Magnetic Deep Brain  Stimulation:

Enhancing savant like creative abilities, Autism, auditory hallucinations, schizophrenia, anxiety, depression, memory impairment, sleepiness, depersonalization, mania, schizophrenia, Tinnitus, multiple sclerosis, Parkinsonism, post-stroke, Pain After Spinal Cord Injury, Panic Disorder, epilepsy, regional pain syndrome, migraine, PTSD,

Questions and Answers on Transcranial Magnetic Stimulation (TMS) from National Alliance on Mental Illness (NAMI)

What is TMS?

Transcranial magnetic stimulation (TMS) is a technique for gently stimulating the brain. It utilizes a specialized electromagnet placed on the patient’s scalp that generates short magnetic pulses, roughly the strength of an MRI scanner’s magnetic field but much more focused. The magnetic pulses pass easily through the skull just like the MRI scanner fields do, but because they are short pulses and not a static field, they can stimulate the underlying cerebral cortex (brain). Low frequency (once per second) TMS has been shown to induce reductions in brain activation while stimulation at higher frequencies (> 5 pulses per second) has been shown to increase brain activation. It has also been shown that these changes can last for periods of time after stimulation is stopped. TMS was first developed in 1985, and has been studied significantly since 1995. TMS is not Vagus Nerve Stimulation or Acupuncture.

What disorders has TMS been shown to be useful for?

TMS is currently being investigated as a potential treatment for patients with major depression, patients who experience hallucinated “voices” and a variety of other psychiatric and neurological disorders. Over 1500 patients have been studied with TMS. For patients with major depression, many, but by no means all studies have shown clinical improvement following TMS. Recent studies that have used newer technology and stronger stimulation have shown much improved results. These pilot studies have taught researchers about how to better use TMS for depression.

For patients reporting auditory hallucinations (voices), research has not been as extensive but initial results have been promising and suggest that low frequency TMS administered to parts of the brain underlying speech perception may reduce these voices.

The Food and Drug Administration has not approved TMS for any psychiatric treatment at this time. Therefore TMS is only available as a research procedure. TMS has been approved in Canada and Israel as a treatment of depression for patients who have not responded to medications and who might ordinarily be considered for a trial of electroconvulsive therapy (ECT).

What does it feel like to receive TMS?

Generally TMS produces a slight knocking or tapping sensation on the head. This is also associated with a tapping sound produced by the TMS device. When administered at some stimulation sites it can cause contraction of the muscles of the scalp and occasionally the jaw. Mild headache and transient lightheadedness may sometimes result from TMS. These symptoms usually resolve by themselves shortly after the treatment is over.

Do you need to get anesthetized for TMS?

No. TMS is an outpatient procedure and does not require anesthesia or an IV. It can be administered in a physician’s office or clinic.

Does it hurt?

Approximately 5-10% of patients experience discomfort at the site of stimulation. In general this has not been a problem when administering TMS to patients volunteering for research studies.

How long does a treatment session last?

It depends on the research protocol, but generally each session takes about a half an hour. One procedure includes 2 daily sessions approximately 20 minutes each, with a 30-minute break between them. It is performed for 10 days, with a rest period of 2 days between the first 5 days and the second 5 days. There are 20 sessions in total.

How many times do you need to receive TMS?

Research protocols vary in the treatment duration, but most require at least two weeks of daily stimulation given five times per week, some require up to 6 weeks.

Are there any side-effects or risks associated with TMS?

Yes. The main risk of TMS, as with any pulsed energy, is inducing a seizure, though with close monitoring this complication has been very rare. No seizures have been reported in the scientific literature since safety guidelines have been implemented. For stimulation at low frequency (1 to 5 pulses per second) there have been no reports of seizures. Insofar as the brain is directly stimulated by TMS, there is a potential risk of disturbing the brain’s normal functions. However, in depression studies reported so far, no cognitive side-effects like loss of memory, negative changes in concentration and other cognitive capacities have been reported. This is in stark contract to the well known cognitive side effects associated with electroconvulsive therapy (ECT).

Is TMS widely available to patients in the U.S. and Canada?

TMS is not yet FDA cleared but has been approved in Canada and can be purchased from Biophysica.

Why are researchers evaluating TMS?

TMS has some very unique properties. It is non-invasive, (does not break the skin and can be delivered in a physician’s office) can easily be focused on small areas of the brain, and can change brain activity. This makes it particularly well suited for treating the brain, while minimizing side effects typical with other psychiatric treatments which affect areas of the brain and body not involved in the disorder.

Specifically for major depression, researchers understand there are a significant number of patients suffering from this disorder that are not helped by the available medications and other therapies, only receive partial benefit, or are not able to take medications at all. TMS offers hope that, if proven effective, many of these patients may be able to experience symptom relief.

Reviewed by Stanford Miller July 2004

Research on Transcranial Magnetic Stimulation

November 27 , 2007   Penn Research Shows Transcranial Magnetic Stimulation Effective in Treating Major Depression   Non-drug, non-invasive treatment helps patients who have tried other options without success

PHILADELPHIA – Researchers at the University of Pennsylvania School of Medicine and other study sites have found that transcranial magnetic stimulation (TMS) – a non-invasive technique that excites neurons in the brain via magnetic pulses passed through the scalp – is a safe and effective, non-drug treatment with minimal side effects for patients with major depression who have tried other treatment options without benefit.

This study – the largest to-date studying TMS as a standalone treatment for major depression – appears in the December 1st issue of Biological Psychiatry.

TMS provides a well-tolerated treatment option to patients whose depression is otherwise treatment resistant,” says John P. O’Reardon, MD, Associate Professor of Psychiatry at Penn, and lead study author.  “Since TMS is administered via the scalp and therefore goes directly to the brain, it allows the patient to avoid bodily side effects such as weight gain, sedation and/or sexual function.”

The study was conducted at 23 sites in the U.S., Australia, and Canada, and involved 301 medication-free patients with major depression who had not benefited from prior treatment.  The patients were randomized to active or sham TMS for 4-6 weeks.  Response and remission rates with active TMS were approximately twice those of sham.  Additionally, there were no unexpected, serious side effects, and less than 5% of patients discontinued their TMS due to side effects.  This is about three times better tolerated and safer than standard medications, which have about a 15% discontinuation rate due to side effects.

Dr. O’Reardon further comments, “As indicated by recent large scale, government-sponsored, studies of existing treatment options for major depression conducted by the National Institute of Health (the STAR-D reports), there is a great need to develop new, effective treatments for patients, especially those not benefiting from first line interventions. The results of this study indicate that TMS offers new hope to patients in this regard.”

Additional study authors are H. Brent Solvason, Philip G. Janiak, Shirlene Sampson, Keith E. Isenberg, Ziad Nahas, William M. McDonald, David Avery, Paul B. Fitzgerald, Colleen Loo, Mark A. Demitrack, Mark S. George, and Harold A. Sackeim.

Magnetic Stimulation Therapy Effective for Treatment-Resistant Depression: can beat depression when medication and therapy haven’t worked, according to the December issue of Mayo Clinic Health Letter. Dec 2009

The therapy, called transcranial magnetic stimulation (TMS), involves using brief powerful electromagnetic pulses to alter brain activity. The U.S. Food and Drug Administration (FDA) has approved the therapy for patients whose depression hasn’t improved with medications – estimated to be from 10 to 20 percent of those with the illness.

Patients treated with TMS may experience total remission of depression symptoms. A 50 percent improvement in depression symptoms is common.

A typical treatment schedule involves five, one-hour sessions a week for at least three to five weeks. During a session, the patient sits in a reclining chair while the magnetic coil is positioned and activated. Patients remain awake and alert as the coil alters brain activity. No anesthesia or invasive procedures are used. The benefits gradually emerge over several weeks.

A recent study compared TMS therapy in a group of people who had drug-resistant depression to a matched group of patients who received an inactive placebo form of TMS therapy. After four to six weeks, the TMS group was twice as likely to have remission of depression symptoms as the group receiving the placebo treatment.

While TMS is being used to treat depression at select medical centers, there are still many unknowns. Researchers don’t know how long the benefits might last. The general belief is that most patients who improve with TMS will continue to need some ongoing therapy for depression, whether it’s medication, counseling, additional TMS sessions or some combination of these therapies.  

References and Links

Selected references and free abstracts from over 2000 published articles on TMS at

Conditions treated auditory hallucinations, depression, schizophrenia, multiple sclerosis, Parkinsonism, post-stroke, Pain After Spinal Cord Injury, tinnitus, Panic Disorder, epilepsy, regional pain syndrome, migraine.

High-frequency oscillations change in parallel with short-interval intracortical inhibition after theta burst magnetic stimulation
Clinical NeurophysiologyVolume 119, Issue 2February 2008Pages 301-308
Takenobu Murakami, Kenji Sakuma, Takashi Nomura, Kenji Nakashima and Isao Hashimoto

Progress in treatment of auditory hallucinations with repetitive transcranial magnetic stimulation
Schizophrenia ResearchVolume 98, Supplement 1February 2008Page 26
A. Aleman, I.E. Sommer, Z.J. Daskalakis and A. Vercammen
Augmentative repetitive transcranial magnetic stimulation in treatment-resistant bipolar depressives
Schizophrenia ResearchVolume 98, Supplement 1February 2008Pages 54-55
B. Dell’Osso, E. Mundo, N. D’Urso, S. Pozzoli and A.C. Altamura
Repetitive transcranial magnetic stimulation efficiency in treatment-resistant auditory hallucinations
Schizophrenia ResearchVolume 98, Supplement 1February 2008Page 56
S. Grenier, G. Fouldrin, G. Allio, G. Opolczynski and F. Thibaut
The physiological basis of transcranial magnetic stimulation
Trends in Cognitive SciencesIn Press, Corrected ProofAvailable online 1 February 2008
Sven Bestmann
Repetitive transcranial magnetic stimulation (rTMS) and magnetic seizure therapy (MST)
Journal of Affective DisordersIn Press, Corrected ProofAvailable online 30 January 2008
T.E. Schlaepfer, C. Frick and S. Kayser
A study of the effectiveness of bilateral transcranial magnetic stimulation in the treatment of the negative symptoms of schizophrenia
Brain StimulationVolume 1, Issue 1January 2008Pages 27-32
Paul B. Fitzgerald, Sally Herring, Kate Hoy, Susan McQueen, Rebecca Segrave, Jayashri Kulkarni and Zafiris J. Daskalakis
Investigation of paroxysmal dystonia in a patient with multiple sclerosis: A transcranial magnetic stimulation study
Clinical NeurophysiologyVolume 119, Issue 1January 2008Pages 63-70
Carlo Trompetto, Laura Avanzino, Marco Bove, Alessandro Buccolieri, Antonio Uccelli and Giovanni Abbruzzese
Enhancing language performance with non-invasive brain stimulation—A transcranial direct current stimulation study in healthy humans
NeuropsychologiaVolume 46, Issue 12008Pages 261-268
Roland Sparing, Manuel Dafotakis, Ingo G. Meister, Nivethida Thirugnanasambandam and Gereon R. Fink
Recovery of motor disability and spasticity in post-stroke after repetitive transcranial magnetic stimulation (rTMS)
Brain Research BulletinIn Press, Uncorrected ProofAvailable online 26 December 2007
J. Málly and E. Dinya
The clinical diagnostic utility of transcranial magnetic stimulation: Report of an IFCN committee
Clinical NeurophysiologyIn Press, Corrected ProofAvailable online 11 December 2007
Robert Chen, Didier Cros, Antonio Curra, Vincenzo Di Lazzaro, Jean-Pascal Lefaucheur, Michel R. Magistris, Kerry Mills, Kai M. Rösler, William J. Triggs, Yoshikazu Ugawa and Ulf Ziemann
The Effect of a Series of Repetitive Transcranial Magnetic Stimulations of the Motor Cortex on Central Pain After Spinal Cord Injury
Archives of Physical Medicine and RehabilitationVolume 88, Issue 12December 2007Pages 1574-1580
Ruth Defrin, Leon Grunhaus, Doron Zamir and Gabi Zeilig
Efficacy and Safety of Transcranial Magnetic Stimulation in the Acute Treatment of Major Depression: A Multisite Randomized Controlled Trial
Biological PsychiatryVolume 62, Issue 111 December 2007Pages 1208-1216
John P. O’Reardon, H. Brent Solvason, Philip G. Janicak, Shirlene Sampson, Keith E. Isenberg, Ziad Nahas, William M. McDonald, David Avery, Paul B. Fitzgerald, Colleen Loo, Mark A. Demitrack, Mark S. George and Harold A. Sackeim
Modulation of cardiac autonomic functions in patients with major depression treated with repetitive transcranial magnetic stimulation
Journal of Affective DisordersVolume 104, Issues 1-3December 2007Pages 231-236
Kaviraja Udupa, T.N. Sathyaprabha, Jagadisha Thirthalli, K.R. Kishore, T.R. Raju and B.N. Gangadhar
Patterns of response to repetitive transcranial magnetic stimulation (rTMS) in major depression: Replication study in drug-free patients
Journal of Affective DisordersIn Press, Corrected ProofAvailable online 26 October 2007
Eva-Lotta Brakemeier, Gregor Wilbertz, Silke Rodax, Heidi Danker-Hopfe, Bettina Zinka, Peter Zwanzger, Nicola Grossheinrich, Bálint Várkuti, Rainer Rupprecht, Malek Bajbouj and Frank Padberg
An open study of repetitive transcranial magnetic stimulation in treatment-resistant depression with Parkinson’s disease
Clinical NeurophysiologyVolume 118, Issue 10October 2007Pages 2189-2194
Charles M. Epstein, Marian L. Evatt, Agnes Funk, Lhys Girard-Siqueira, Nichole Lupei, Larisa Slaughter, Saima Athar, Joanne Green, William McDonald and Mahlon R. DeLong
P.2.g.004 Repetitive transcranial magnetic stimulation for depression: a randomised controlled trial with 4-month follow-up
European NeuropsychopharmacologyVolume 17, Supplement 4October 2007Pages S392-S393
D.M. McLoughlin, A. Mogg, G. Pluck, S. Eranti, S. Landau, R. Purvis, R.G. Brown, R. Howard, V. Curtis and M. Philpot
Which tinnitus patients benefit from transcranial magnetic stimulation?
Otolaryngology – Head and Neck SurgeryVolume 137, Issue 4October 2007Pages 589-595
Tobias Kleinjung, Thomas Steffens, Philipp Sand, Tobias Murthum, Goeran Hajak, Juergen Strutz, Berthold Langguth and Peter Eichhammer
Safety study of high-frequency transcranial magnetic stimulation in patients with chronic stroke
Clinical NeurophysiologyVolume 118, Issue 9September 2007Pages 2072-2075
M.P. Lomarev, D.Y. Kim, S. Pirio Richardson, B. Voller and M. Hallett
Repetitive Transcranial Magnetic Stimulation (rTMS) in the treatment of Panic Disorder (PD) with comorbid major depression
Journal of Affective DisordersVolume 102, Issues 1-3September 2007Pages 277-280
Antonio Mantovani, Sarah H. Lisanby, Fulvio Pieraccini, Monica Ulivelli, Paolo Castrogiovanni and Simone Rossi
Positive predictors for antidepressive response to prefrontal repetitive transcranial magnetic stimulation (rTMS)
Journal of Psychiatric ResearchVolume 41, Issue 5August 2007Pages 395-403
Eva-Lotta Brakemeier, Alexander Luborzewski, Heidi Danker-Hopfe, Norbert Kathmann and Malek Bajbouj
Transcranial Magnetic Stimulation in Veterans with Tinnitus
Otolaryngology – Head and Neck SurgeryVolume 137, Issue 2, Supplement 1August 2007Page P181
Scott L. Lee, Steven M. Silver and Anthony Cacace
Low frequency repetitive transcranial magnetic stimulation over premotor cortex can improve cortical tremor
Clinical NeurophysiologyVolume 118, Issue 7July 2007Pages 1557-1562
E. Houdayer, H. Devanne, L. Tyvaert, L. Defebvre, P. Derambure and F. Cassim
Safety and tolerability of repetitive transcranial magnetic stimulation in patients with epilepsy: a review of the literature
Epilepsy & BehaviorVolume 10, Issue 4June 2007Pages 521-528
Erica Hyunji Bae, Lara M. Schrader, Katsuyuki Machii, Miguel Alonso-Alonso, James J. Riviello Jr., Alvaro Pascual-Leone and Alexander Rotenberg
Repetitive transcranial magnetic stimulation over the motor cortex can change the pain perception in patients with complex regional pain syndrome
European Journal of PainVolume 11, Issue 1, Supplement 1June 2007Page 188
H. Picarelli, M.J. Teixeira, M.A. Marcolin, M.L. Myczkowski and T.B. Luvisotto
Repetitive Transcranial Magnetic Stimulation (rTMS) in Experimentally Induced and Chronic Neuropathic Pain: A Review
The Journal of PainVolume 8, Issue 6June 2007Pages 453-459
Raphael J. Leo and Tariq Latif

Price of portable professional TMS stimulator :  $6000 USD. Precision external frequency generator is extra.  220v AC operation selector switch is extra.  This price reflects the extensive design and choice of military quality components which are necessary for this high powered device. Comes with separate portable magnetic detector which indicates the presence of magnetic pulse.  Range of effectiveness is more than sufficient to stimulate deep organs such as pituitary, pineal, pancreas, colon, bladder, lungs.  To order call or e-mail us  This device was designed and built in Ontario, Canada by Dr John Stewart

Our electric and magnetic devices emit energies that are similar to established proven technologies and may be helpful in similar situations.  Our specific devices have not been scientifically proven to achieve equal results and are experimental and custom built.

Contact: Biophysica Inc., Toronto, Ont, Canada

Our Technical Support Hotline, Phone: (416) 636-5804 or Toll Free 1-800-488-2032 from Canada, US and Territories (10am to 10pm Eastern Standard Time)

e-mail: biophysica at gmail dot com (preferably) with copy to info at biophysica dot com (to avoid e-mail harvesters change the “at” and dot”