A digital intervention targeting cognitive control network dysfunction in middle age and older adults with major depression.
Faith M GunningJoaquin A AngueraLindsay W VictoriaPatricia A AreánPublished in: Translational psychiatry (2021)
Nonpharmacological interventions targeting putative network mechanisms of major depressive disorder (MDD) may represent novel treatments. This mechanistic study investigates how a video game-like intervention, designed to improve cognitive control network (CCN) functioning by targeting multitasking, influences the CCN of middle-aged and older adults with MDD. The sample consisted of 34 adults aged 45-75 with SCID-defined diagnosis of MDD, Hamilton depression rating scale scores ≥20, and a deficit in cognitive control. Participants were instructed to play at home for 20-25 min per day, at least 5 times per week, for 4 weeks. Evidence of target engagement was defined a priori as >2/3 of participants showing CCN improvement. CCN engagement was defined as a change in a Z score of ≥0.5 on functional magnetic resonance imaging (fMRI) in activation and functional connectivity of the CCN during task-based and resting-state fMRI, respectively. 74% of participants showed a change in activation of the CCN, and 72% showed an increase in resting-state functional connectivity. Sixty-eight percent demonstrated improved cognitive control function, measured as either improvement on sustained attention or working memory performance or reduced self-reported symptoms of apathy on the frontal systems behavioral scale (FrsBe). Participants also reported a significant reduction in mood symptoms measured by PHQ-9. A remotely deployed neuroscience-informed video game-like intervention improves both CCN functions and mood in middle-aged and older adults with MDD. This easily-disseminated intervention may rescue CCN dysfunction present in a substantial subset of middle-aged and older adults with MDD.
Keyphrases
- functional connectivity
- resting state
- major depressive disorder
- bipolar disorder
- working memory
- randomized controlled trial
- physical activity
- magnetic resonance imaging
- sleep quality
- social media
- community dwelling
- oxidative stress
- middle aged
- clinical trial
- depressive symptoms
- attention deficit hyperactivity disorder
- transcranial direct current stimulation
- magnetic resonance
- drug delivery
- network analysis