This study seeks to understand emotion regulation in those with anxiety using real-time functional magnetic resonance imaging neurofeedback, a tool that allows individuals to control brain activity. The goal of this project is to understand how receiving feedback about one's own brain activity relates to emotion regulation ability. This work will help the study team understand the brain areas involved in emotion regulation and could lay the groundwork to test if psychotherapy outcomes can be enhanced using neurofeedback. The study hypotheses include: * Participants receiving veritable-Neurofeedback (NF) will show a greater activation increase in the prefrontal cortex (PFC) compared to sham-NF * Participants receiving veritable-NF will show greater cognitive reappraisal (CR) ability compared to those receiving sham-NF * Prefrontal cortex activation will positively correlate with CR ability
Due to an unforeseen error in our online neurofeedback script, in which the location of the brain region being targeted was not properly read by the script, participants in the veritable-NF group received feedback to the medial parietal cortex (MPC) instead of the PFC. A third, unrandomized arm has been added to this registration to enroll an additional subset of participants who are indeed receiving feedback to the PFC. The pre-existing veritable-NF arm has been relabeled to reflect which region of the brain was actually targeted. Additionally, the masking description has been reset to "None".
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
BASIC_SCIENCE
Masking
NONE
Enrollment
21
Participants will have 4 visits (some can be done virtually). The baseline visit will include an interview and questionnaires. Eligible participants will have a practice session at visit 2, and may do a mock scanner if the visit is in person. Visit 3 will take place within 5 days of the practice session and participants will be asked to complete questionnaires and have an fMRI with the real neurofeedback. Visit 4 will take place one month after visit 3 and will include a follow-up interview with a trainer assessor as well as questionnaires. Additionally, 2 weeks after visit 3 participants will also complete some questionnaires online.
Participants will have 4 visits (some can be done virtually). The baseline visit will include an interview and questionnaires. Eligible participants will have a practice session at visit 2, and may do a mock scanner if the visit is in person. Visit 3 will take place within 5 days of the practice session and participants will be asked to complete questionnaires and have an fMRI with feedback that looks similar to real neurofeedback, but is computer generated. Visit 4 will take place 2 weeks after visit 3 and participants will complete more questionnaires.
University of Michigan
Ann Arbor, Michigan, United States
Change in Prefrontal Cortex (PFC) Activity (Baseline to Transfer Run) From the Reappraise > Look Contrast on the Emotion Regulation Task (ERT)
The PFC was defined in MNI space using significant group level activation in the posterior medical frontal cortex from the reappraise\>look contrast from earlier pilot subjects. Percent signal change in this region was extracted for all participants. Change in PFC activity was calculated as the linear slope of change across all 5 runs of the task. To this end, a linear regression was conducted for each participant separately with "run" as the independent variable and "PFC percent signal change" as the dependent variable to calculate change in percent signal change over time. These slopes were then averaged for each group .
Time frame: Approximately 60 minutes
Difference in Negative Affect Ratings of Images From International Affective Picture System (IAPS)
The Self-Assessment Manikin (SAM) is a pictorial assessment technique in which a changing manikin figure depicts values along the primary dimension of affective valence (positive/negative). Users may indicate emotional reactions along a scale from 1-9, with higher numbers indicating greater negative affect. After the scan, participants will rate each image they saw along this scale. Differences in SAM ratings from look to reappraise trials (e.g., average reappraise score minus average look score) will be evaluated and compared between sham-NF and veritable-NF groups. Higher difference score indicates that images viewed during reappraisal are seen as more positive than those viewed during the look condition.
Time frame: Within 10 minutes of exiting the scanner
Change in Amygdala-PFC Functional Connectivity (Baseline to Transfer) From Reappraise > Look Contrast
To examine amygdala connectivity, the study team will use a psychophysiological interaction analysis. Deconvolved time series from anatomical left and right amygdala seeds for each participant will be multiplied by a vector for the reappraise \> look contrast at each run (baseline, neurofeedback (NF1, NF2, NF3), transfer). Regressors for the seed time series, the original condition and the interaction term will be convolved with the canonical hemodynamic response function. Change in connectivity from pre-to-post training will be calculated by subtracting the baseline-run contrast map from the transfer-run contrast map. Resulting contrast maps will be entered into second-level random effects analyses in the software SPM, where voxels in the PFC will be examined at p\<0.05 FWE-corrected threshold.
Time frame: Each run is approximately 9 minutes long. Run 5 starts approximately 30 minutes after the completion of run 1.
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