Real-time Functional Magnetic Resonance Imaging Neurofeedback Training of Amygdala Upregulation Increases Affective Flexibility in Depression

Overview

Journal J Psychiatry Neurosci

Specialty Psychiatry

Date 2023 Jun 20

PMID 37339817

Authors

Laurie Compere

Greg J Siegle

Sair Lazzaro

Marlene Strege

Gia Canovali

Scott Barb

Theodore Huppert

Kymberly Young

Affiliations

Soon will be listed here.

Abstract

Background: Decreased affective flexibility is associated with depression symptoms, and it has been suggested that common interventions may target this mechanism. To explore this hypothesis, we evaluated whether real-time functional magnetic resonance imaging neurofeedback (rtfMRI-nf) training to increase the amygdala responses during positive memory recall resulted in both symptom improvements, as has been observed previously, and flexibility to decrease amygdala reactivity in response to a cognitive task among patients with major depressive disorder (MDD).

Methods: In a double-blind, placebo-controlled, randomized clinical trial, adults with MDD received 2 sessions of rtfMRI-nf training to increase their amygdala (experimental group) or parietal (control group) responses during positive autobiographical memory recall. We evaluated signal changes in the amygdala during both the positive memory neurofeedback and a subsequent counting condition.

Results: We included 38 adults with MDD, including 16 in the experimental group and 22 in the control group. In the experimental group, amygdala activity increased ( > 2.01, df < 27, < 0.05, > 0.5) and depressive symptoms decreased (-8.57, 95 % confidence interval [CI] -15.12 to -2.59; = -3.06, = 0.009, = 1). Amygdala activity during the count condition decreased after rtfMRI-nf (-0.16, 95 % CI -0.23 to -0.09; = 4.73, < 0.001, = 0.48) and was correlated with decreased depression scores ( = 0.46, = 0.01). We replicated previous results and extended them to show decreased amygdala reactivity to a cognitive task during which no neurofeedback was provided.

Limitations: The count condition was reported by participants as negative, but emotionality or accuracy during this condition was not assessed.

Conclusion: These results suggest that nominally targeting unidimensional change in neural mechanisms could have implications for bidirectional control, increasing the likely reach and explanatory framework for how common depression interventions work. ClinicalTrials.gov NCT02709161.

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