The primary goal of this study is to elucidate the impact of disorder provocation on the efficacy of TMS for the treatment of BED. In order to meet this objective, the investigators propose to evaluate this relationship in using a crossover study. Secondary objectives of this study include determining whether TMS with or without BED symptom provocation has effects in altering neurophysiology as detected by fMRI.
Current literature has demonstrated that transcranial magnetic stimulation (TMS) targeting the dorsolateral prefrontal cortex (DLPFC) has some efficacy in treating binge eating disorder. The investigators believe that TMS may be beneficial in the treatment of binge eating disorder. The purpose of this study is to determine whether TMS has efficacy for binge eating disorder and if symptom provocation affects treatment. This study will be conducted as a pilot study in the Keck Hospital clinics. 32 adult patients with a clinical diagnosis of binge eating disorder will be recruited.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
DOUBLE
Enrollment
32
double blinded crossover schedule in which participants will undergo TMS and assessment in one visit, followed by sham-TMS and assessment the next visit.
double blinded crossover schedule in which participants will undergo sham TMS and assessment in one visit, followed by TMS and assessment the next visit.
The effect of symptom provocation on TMS-mediated changes in the blood-oxygen-level-dependent(BOLD) signal
BOLD signals measure neural activity indirectly via neurovascular coupling Changes in BOLD signals from baseline after TMS +/- symptom provocation will be compared after completion of the crossover study (day 33).
Time frame: 33 Days
The effect of symptom provocation on TMS-mediated changes in the functional connectivity (FC) within and between pathophysiologically-relevant networks.
FC measures correlation in activity between different brain regions. Changes in FC from baseline after TMS +/- symptom provocation will be compared after completion of the crossover study (day 33).
Time frame: 33 Days
The effect of symptom provocation on TMS-mediated changes in the behavioral inhibition system (BIS)/behavioral activation system (BAS) scale score
BIS/BAS scale is a self reported 24 item questionnaire that assesses the BIS, a motivation system for avoiding aversive outcomes, and BAS, a motivation system for approaching goal-oriented outcomes. The total score for BIS scale ranges from 0 to 28 (7 items ranging from 0-4). The total score for BAS ranges from 0 to 52 (13 items ranging from 0-4). Four questions are fillers. Higher score represents greater severity of symptoms. Changes in BIS/BAS scale from baseline after TMS+/- symptom provocation will be compared after completion of the crossover study (day 33).
Time frame: 33 Days
The effect of symptom provocation on TMS-mediated changes in the Eating Disorder Examination - Questionnaire (EDE-Q)
The EDE-Q is a self report questionnaire of ED symptomatology over the preceding 28 days, that encompasses behavioral and attitudinal symptoms across four domains - dietary restraint, eating concern, shape concern, and weight concern. The subscores are calculated as follows: Restraint = (Item 1 + Item 2 + Item 3 + Item 4 + Item 5) / 5; Eating Concern = (Item 6 + Item 7 + Item 9 + Item 15 + Item 34) / 5; Weight Concern = (Item 11 + Item 14 + Item 29 + Item 31 + Item 32) / 5; Shape Concern = (Item 10 + Item 11 + Item 12 + Item 13 + Item 30 + Item 33 + Item 35 + Item 36) / 8; Global Score = (Restraint + Eating Concern + Weight Concern + Shape Concern) / 4 Higher score represents greater severity of symptoms. Changes in the EDE-Q score from baseline after TMS +/- symptom provocation will be compared after completion of the crossover study (day 33).
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Time frame: 33 days
The effect of symptom provocation on TMS-mediated changes in the Eating Disorder (ED 15) questionnaire.
The ED 15 questionnaire is a measure of eating disorder symptomatology, designed to measure dynamic, session-by-session fluctuations in ED symptom severity. The overall score ranges from 0-6, as it is calculated as the mean of the scores on all ten items, each ranging from 0-6 on symptom severity. Higher score represents greater severity of symptoms. Changes in the ED 15 questionnaire score from baseline after TMS +/- symptom provocation will be compared after completion of the crossover study (day 33).
Time frame: 33 days