Bradley Hospital
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).
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…
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.
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