Accelerated iTBS Targeting of Working Memory Versus Inhibitory Control in Adolescent ADHD
Bradley Hospital
Summary
The objective of this project is to examine the differential therapeutic effect of intermittent theta burst stimulation (iTBS; a type of repetitive transcranial magnetic stimulation) to the left DLPFC versus right PreSMA in modulating working memory (WM) versus inhibitory control (IC) deficits. Fifty adolescents (12-18 years old) with parent-reported WM and IC deficits and diagnosed ADHD will be randomized to DLPFC or PreSMA targeted 3x-daily iTBS for a total of ten days (30 total sessions).
Eligibility
- Age range
- 12–18 years
- Sex
- All
- Healthy volunteers
- No
Inclusion Criteria 1. Age 12-18 years 2. English fluency of participant and parent and able to provide informed consent/assent 3. Clinical diagnosis of ADHD and confirmation of diagnostic criteria on the Diagnostic Interview for Anxiety, Mood, and OCD and Related Neuropsychiatric Disorders, Child and Adolescent Version (DIAMOND-KID) 4. Parent rating on The Behavior Rating Inventory of Executive Function-Second Edition (BRIEF-2), Parent Form: Working Memory scale T-Score \> 60 AND Inhibition scale T-Score \> 60 5. IQ \> 70 Exclusion Criteria Participants will be screened to exclude individua…
Interventions
- Deviceintermittent theta burst stimulation (iTBS)
Device: Stimulation will be delivered using a Nexstim NBT System 2 device. Motor Threshold: The iTBS pulse intensity will be set at 80% of resting motor threshold (MT). The iTBS protocol will administer 2-second trains with an 8-second inter-burst interval for 1800 pulses \[600 bursts\]), in 50 Hz bursts at 5 Hz (i.e., 200 ms intervals). Each session will last approximately nine minutes. As three sessions will be administered per day, there will be a 20-30 minutes break between each of the nine-minute iTBS sessions. Magnetic pulses will be delivered in an MRI neuro-navigated manner using a cooled figure-eight coil. The PreSMA target will be approximately defined based on MNI coordinates: 13, 18, 62. The left DLPFC target will be approximately defined based on MNI coordinates: -44, 28, 16.
Location
- E. P. Bradley HospitalEast Providence, Rhode Island