TMS Stimulation for Healthy Subjects

Recruiting in Palo Alto (17 mi)

Overseen by Regina Lapate, Ph.D.

Age: 18 - 65

Sex: Any

Travel: May Be Covered

Time Reimbursement: Varies

Trial Phase: Academic

Recruiting

Sponsor: University of California, Santa Barbara

Must not be taking: Psychiatric medications

Disqualifiers: Psychiatric disorder, Neurological disease, Seizures, others

No Placebo Group

Approved in 4 Jurisdictions

Trial Summary

What is the purpose of this trial?

This trial uses brain scans and magnetic stimulation to study how healthy people's brains process emotional and time-related information to guide actions.

Will I have to stop taking my current medications?

The trial does not specify if you need to stop taking your current medications, but you cannot participate if you are currently using psychiatric medication.

What data supports the effectiveness of the treatment TMS Stimulation, Transcranial Magnetic Stimulation, TMS Therapy?

Research indicates that TMS has shown potential usefulness as a therapy for several neuropsychiatric conditions, and it is a non-invasive way to stimulate the brain, which is important for neuroscience and neuropsychiatry. ^{1 2 3 4 5}

Is transcranial magnetic stimulation (TMS) generally safe for humans?

TMS is generally considered safe for humans, but it can cause mild side effects like headaches and nausea, and in rare cases, seizures. Safety has been evaluated in various groups, including healthy adults and children, with a slight risk of seizures noted. ^{6 7 8 9 10}

How is TMS Stimulation different from other treatments?

TMS Stimulation is unique because it uses magnetic fields to noninvasively stimulate specific areas of the brain, which can directly affect brain function without the need for surgery or medication. This method allows for precise targeting of brain regions and can provide insights into brain function and recovery, making it different from traditional treatments that might involve drugs or more invasive procedures. ^{4 11 12 13 14}

Research Team

Regina Lapate, Ph.D.

Principal Investigator

University of California, Santa Barbara

Eligibility Criteria

This trial is for healthy individuals interested in participating in a study that examines how the brain processes emotional and temporal information. Participants should be willing to undergo fMRI scans and transcranial magnetic stimulation (TMS). Specific eligibility criteria are not provided.

Inclusion Criteria

Fluent English speaker

Right-handed

Normal to corrected-to-normal vision

Exclusion Criteria

Sleep deprived (TMS only)

Women with a chance of pregnancy

I have a history of seizures.

Trial Timeline

Screening

Participants are screened for eligibility to participate in the trial

2-4 weeks

fMRI Session

Participants undergo an fMRI session to collect baseline data for emotional and temporal information processing

1 session

1 visit (in-person)

TMS+fMRI Sessions

Participants undergo 3 TMS+fMRI sessions targeting different brain regions to assess causal contributions to task performance

3 sessions

3 visits (in-person)

Follow-up

Participants are monitored for safety and effectiveness after the TMS+fMRI sessions

4 weeks

Treatment Details

Interventions

• TMS Stimulation (Behavioural Intervention)

Trial Overview The study is testing how certain brain regions track emotional and time-related information from dynamic events, using fMRI scans while participants view images. The goal is to understand how this informs actions. TMS will be used to explore the causal role of these regions.

Participant Groups

Group I: Duration difference estimation Experimental Treatment 3 Interventions

Participants will view emotional sequences composed of four emotional images. They will be asked to indicate whether the total duration of positive or negative emotional events was longer, by responding with a button press to a contextual cue defining the relevant action (Left vs Right button). The amount of temporal evidence in favor of one valence in a 12-s sequence is varied orthogonally with respect to the (predominant) emotional valence by varying individual picture presentation times. Participants will undergo one fMRI session and 3 TMS+fMRI sessions (2 of the TMS sessions target prefrontal (PFC) sites, and 1 targets a non-PFC control site).

TMS Stimulation is already approved in Canada for the following indications:

Approved in Canada as TMS Therapy for:

• Major Depressive Disorder
• Obsessive-Compulsive Disorder

Who Is Running the Clinical Trial?

University of California, Santa Barbara

Lead Sponsor

Trials

33

Recruited

3,100+

Findings from Research

Transcranial magnetic stimulation (TMS) is a non-invasive brain stimulation technique that offers advantages over other methods like vagus nerve stimulation and deep brain stimulation, which require surgery or anesthesia.

TMS has shown promise in various areas, including as a therapeutic tool for neuropsychiatric conditions, a research instrument in neuroscience, and a potential method to enhance cognitive performance.

NCBI (Pubmed)

pubmed.ncbi.nlm.nih.gov

Mechanisms and the current state of transcranial magnetic stimulation. George, MS., Nahas, Z., Kozol, FA., et al.[2019]

The new 'sandwich' TMS setup significantly reduces the magnetic field in the sham condition to about one eighth of that in the active stimulation condition, effectively minimizing unwanted stimulation of both the targeted brain area and neighboring regions.

This innovative design allows researchers to conduct TMS studies with a reliable sham condition, ensuring that subjects cannot distinguish between active and sham stimulation based on external cues, thus improving the overall quality of TMS research.

NCBI (Pubmed)

pubmed.ncbi.nlm.nih.gov

Transcranial magnetic stimulation--a sandwich coil design for a better sham. Sommer, J., Jansen, A., Dräger, B., et al.[2021]

Transcranial magnetic stimulation (TMS) is a non-invasive technique that can stimulate neurons in the brain, potentially affecting both local and distant neuronal activity.

Despite ongoing research and potential applications, current blinded, sham-controlled trials have not demonstrated that TMS is as effective as conventional treatments for any psychiatric or neurological disorders.

NCBI (Pubmed)

pubmed.ncbi.nlm.nih.gov

[Therapeutic potential of repetitive transcranial magnetic stimulation in brain disorders]. Fumal, A., Schoenen, J., de Noordhout, AM., et al.[2015]

Transcranial magnetic stimulation (TMS) was used to assess the cortical representation of lower-limb muscles in 16 healthy young adults, but it could not reliably identify distinct cortical areas for these muscles.

The study found variability in the topography of muscle representation across individuals, suggesting that while TMS can provide insights into muscle mapping, it may not be effective for precise identification of muscle-specific cortical areas.

NCBI (Pubmed)

pubmed.ncbi.nlm.nih.gov

Using transcranial magnetic stimulation to map the cortical representation of lower-limb muscles. Davies, JL.[2022]

Transcranial magnetic stimulation (TMS) is a valuable non-invasive tool for studying brain function and behavior, particularly in visual perception and cognition, and offers unique advantages over traditional neuropsychological lesion studies.

Despite its usefulness, TMS has limitations, particularly regarding the understanding of its physiological effects, which can lead to ambiguous interpretations of results; combining TMS with functional neuroimaging may help address some of these issues, but challenges remain.

NCBI (Pubmed)

pubmed.ncbi.nlm.nih.gov

Combining transcranial magnetic stimulation and functional imaging in cognitive brain research: possibilities and limitations. Sack, AT., Linden, DE.[2019]

A review of 84 single pulse and paired-pulse TMS studies with 1091 Parkinson's disease patients, and 77 repetitive TMS studies with 1137 patients, found a very low risk of adverse events, with no seizures reported.

The overall risk of adverse events from rTMS was 0.040 per patient, with common side effects being mild and transient, such as headaches and scalp pain, indicating that TMS is generally safe for Parkinson's patients.

NCBI (Pubmed)

pubmed.ncbi.nlm.nih.gov

Safety of transcranial magnetic stimulation in Parkinson's disease: a review of the literature. Vonloh, M., Chen, R., Kluger, B.[2021]

Mild adverse effects (MAEs) from transcranial magnetic stimulation (TMS) occur in about 5% of sessions, with most symptoms like headache and nausea reported after the sessions, particularly during initial treatments.

The study found no significant links between participant characteristics (age and gender) or TMS parameters (frequency and intensity) and the occurrence of MAEs, suggesting that initial participant anxiety may play a role in these reports.

NCBI (Pubmed)

pubmed.ncbi.nlm.nih.gov

Comparative incidence rates of mild adverse effects to transcranial magnetic stimulation. Maizey, L., Allen, CP., Dervinis, M., et al.[2022]

In a meta-analysis of 93 randomized controlled trials involving repetitive transcranial magnetic stimulation (TMS), the overall incidence of adverse events (AEs) was found to be higher in the active TMS group (29.3%) compared to the placebo group (13.6%), indicating a 2.60 times greater risk of experiencing AEs with active treatment.

Despite the higher incidence of AEs, TMS is considered a safe and well-tolerated intervention, with common side effects including headache and dizziness, highlighting the importance of recognizing nocebo effects in both clinical trials and practice.

NCBI (Pubmed)

pubmed.ncbi.nlm.nih.gov

Safety, Tolerability, and Nocebo Phenomena During Transcranial Magnetic Stimulation: A Systematic Review and Meta-Analysis of Placebo-Controlled Clinical Trials. Zis, P., Shafique, F., Hadjivassiliou, M., et al.[2022]

This study mapped the optimal stimulation areas for the thenar and anterior tibial muscles in the primary motor cortex using navigated transcranial magnetic stimulation (TMS) in 59 healthy right-handed subjects, providing important normative data for future clinical assessments.

The research revealed significant variability in optimal stimulation sites, particularly in the anteroposterior direction, which is crucial for understanding how brain plasticity affects functional cortical areas in clinical populations.

NCBI (Pubmed)

pubmed.ncbi.nlm.nih.gov

Group-level variations in motor representation areas of thenar and anterior tibial muscles: Navigated Transcranial Magnetic Stimulation Study. Niskanen, E., Julkunen, P., Säisänen, L., et al.[2021]

In a study of 31 right-handed healthy students, transcranial magnetic stimulation (TMS) revealed that motor thresholds increased in the left hemisphere when there was a lack of regular activity in the right hand, indicating a potential impact of muscle use on brain function.

When regular functional loads were resumed on the right hand, the motor thresholds in the left hemisphere decreased, restoring hemispheric asymmetry, suggesting that physical activity can influence motor cortex excitability.

NCBI (Pubmed)

pubmed.ncbi.nlm.nih.gov

[Application of transcranial magnetic stimulation for monitoring of the motor cortex condition in dynamics in healthy subjects]. Gimranov, RF.[2008]

This study established normative values for navigated transcranial magnetic stimulation (TMS) parameters by analyzing muscle responses from 65 healthy volunteers aged 22 to 81, which can help improve the accuracy of TMS in clinical settings.

The findings provide a modified baseline for TMS-related parameters, including motor thresholds and muscle response latencies, which can assist in distinguishing between true pathophysiological changes and suboptimal stimulation in patients.

NCBI (Pubmed)

pubmed.ncbi.nlm.nih.gov

Motor potentials evoked by navigated transcranial magnetic stimulation in healthy subjects. Säisänen, L., Julkunen, P., Niskanen, E., et al.[2009]

Transcranial magnetic stimulation (TMS) is a non-invasive technique that uses magnetic fields to stimulate specific areas of the brain, revealing new insights into brain function and recovery processes, such as those following a stroke.

Over 15 years, TMS has contributed to understanding complex brain functions, including the neuronal basis of consciousness, and is particularly effective when combined with imaging techniques like magnetic resonance imaging (MRI).

NCBI (Pubmed)

pubmed.ncbi.nlm.nih.gov

The Ferrier Lecture 2004 what can transcranial magnetic stimulation tell us about how the brain works? Cowey, A.[2023]

References

1. United States pubmed.ncbi.nlm.nih.gov

Mechanisms and the current state of transcranial magnetic stimulation. [2019]

2. Netherlands pubmed.ncbi.nlm.nih.gov

Transcranial magnetic stimulation--a sandwich coil design for a better sham. [2021]

3. Belgium pubmed.ncbi.nlm.nih.gov

[Therapeutic potential of repetitive transcranial magnetic stimulation in brain disorders]. [2015]

4. Netherlands pubmed.ncbi.nlm.nih.gov

Using transcranial magnetic stimulation to map the cortical representation of lower-limb muscles. [2022]

5. Netherlands pubmed.ncbi.nlm.nih.gov

Combining transcranial magnetic stimulation and functional imaging in cognitive brain research: possibilities and limitations. [2019]

6. England pubmed.ncbi.nlm.nih.gov

Safety of transcranial magnetic stimulation in Parkinson's disease: a review of the literature. [2021]

7. Netherlands pubmed.ncbi.nlm.nih.gov

Image-guided TMS is safe in a predominately pediatric clinical population. [2022]

8. Netherlands pubmed.ncbi.nlm.nih.gov

Comparative incidence rates of mild adverse effects to transcranial magnetic stimulation. [2022]

9. Netherlands pubmed.ncbi.nlm.nih.gov

Seizures from transcranial magnetic stimulation 2012-2016: Results of a survey of active laboratories and clinics. [2021]

10. United States pubmed.ncbi.nlm.nih.gov

Safety, Tolerability, and Nocebo Phenomena During Transcranial Magnetic Stimulation: A Systematic Review and Meta-Analysis of Placebo-Controlled Clinical Trials. [2022]

11. United States pubmed.ncbi.nlm.nih.gov

Group-level variations in motor representation areas of thenar and anterior tibial muscles: Navigated Transcranial Magnetic Stimulation Study. [2021]

12. Russia (Federation) pubmed.ncbi.nlm.nih.gov

[Application of transcranial magnetic stimulation for monitoring of the motor cortex condition in dynamics in healthy subjects]. [2008]

13. United States pubmed.ncbi.nlm.nih.gov

Motor potentials evoked by navigated transcranial magnetic stimulation in healthy subjects. [2009]

14. England pubmed.ncbi.nlm.nih.gov

The Ferrier Lecture 2004 what can transcranial magnetic stimulation tell us about how the brain works? [2023]