Brain-Oscillation Synchronized Stimulation of the DMPFC
Brain-Oscillation Synchronized Stimulation of the DMPFC: A Single-Blind Study for Personalized Neuromodulation in OCD
Centre for Addiction and Mental Health
48 participants
Jan 29, 2025
INTERVENTIONAL
Conditions
Summary
This trial aims to obtain initial evidence about the clinical efficacy and modulation of neurophysiological markers in obsessive compulsive disorder (OCD) using personalized (i.e., electroencephalography (EEG)-triggered) repetitive transcranial magnetic stimulation (rTMS) as compared to non-personalized (i.e., non-EEG triggered), standard rTMS applied to the dorsomedial prefrontal cortex.
Eligibility
Inclusion Criteria9
- Are 18-65 years old;
- Have OCD as a primary disorder, confirmed by a Mini-International Neuropsychiatric Interview (MINI) diagnosis of OCD, with treatment resistance defined as a failure of at least one course of cognitive-behavioural therapy or a single trial of an SSRI;
- Does not meet criteria for substance use disorder as determined by the MINI (with the exception of nicotine and caffeine);
- Have a Y-BOCS score \>20;
- Are fluent in the English language (spoken, written, reading);
- Have had no increase or initiation of any psychotropic medication in the 4 weeks prior to screening;
- Must be deemed to have capacity to provide informed consent;
- Must sign and date the informed consent form;
- Stated willingness to comply with all study procedures.
Exclusion Criteria9
- Have any contraindications to TMS as determined by the Transcranial Magnetic Stimulation Adult Safety Screen (TASS) questionnaire;
- Have a history of a medical or neurological disorder that affects the central nervous system (e.g., traumatic brain injury, stroke, Parkinson's disease);
- Are pregnant or breast feeding. TMS is not unsafe in pregnancy and therefore the study team is not requiring a pregnancy test prior to entry. If participants become pregnant during the study they will not be excluded. The study team is not including people who are currently aware of being pregnant as OCD can be affected during the later stages of pregnancy and therefore is a potential confound;
- Have a history of seizures;
- Have any metal implants or dentures;
- Have a serious or unstable medical condition requiring immediate investigation or treatment (e.g., severe or recent cardiac disease);
- Have a cardiac pacemaker, cochlear implants, implanted electronic devices, non-electronic metallic implants, or other contraindications for rTMS;
- Take more than 2mg of lorazepam or equivalent benzodiazepine, or any anticonvulsant medication;
- Fulfill criteria for Alcohol Use Disorder.
Interventions
The rTMS intervention will be delivered using the MagPro XP - Orange Edition stimulator and COOL D-B80 coil to the dorsomedial prefrontal cortex 4 cm anterior to the foot hotspot. EEG data will be analyzed in real-time using the bossdevice MEDICAL and TMS pulses will be synchronized to the negative peak of the frontoparietal theta oscillation. 500 consecutive EEG theta-oscillation negative-peak triggered quadruplet bursts with a 5 ms inter-pulse interval will be applied at an average inter-burst interval of 2 s. The therapeutic intervention consists of 30 sessions of 2000 TMS pulses each for a total duration per treatment session of 17 minutes.
The rTMS intervention will be delivered using the MagPro XP - Orange Edition stimulator and COOL D-B80 coil to the dorsomedial prefrontal cortex 4 cm anterior to the foot hotspot. High-frequency rTMS consisting of 50 trains at 20 Hz (2 s on, 18 s off) will be delivered. The therapeutic intervention consists of 30 sessions of 2000 TMS pulses each for a total duration per treatment session of 17 minutes.
Locations(1)
View Full Details on ClinicalTrials.gov
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NCT06942559