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Design and Implementation of an fMRI Study Examining Thought Suppression in Young Women with, and At-risk, for Depression
Published on: May 19, 2015
Adolescents with major depression demonstrate increased amygdala activation.
Tony T Yang1, Alan N Simmons, Scott C Matthews
1University of California, San Diego, CA 92123, USA. tyang@ucsd.edu
Summary
Adolescent depression shows increased left amygdala activation, similar to adults. This suggests adult depression models may apply to adolescents, guiding future interventions.
Area of Science:
- Neuroscience
- Psychiatry
- Developmental Psychology
Background:
- Adult depression models are well-established through neuroimaging.
- Neural substrates of adolescent depression remain poorly understood.
- Conflicting findings exist regarding amygdala activity in pediatric depression.
Purpose of the Study:
- To investigate the neural substrates of adolescent depression.
- To examine bilateral amygdala and whole-brain activity in depressed adolescents.
- To compare brain activity in depressed adolescents versus healthy controls.
Main Methods:
- Functional magnetic resonance imaging (fMRI) at 3 Tesla.
- Facial-emotion matching task used during scanning.
- Study included 12 unmedicated adolescents with major depressive disorder and 12 controls (ages 13-17).
Main Results:
- Both depressed and healthy adolescents showed bilateral amygdala activation.
- Depressed adolescents exhibited significantly greater left amygdala activation than controls.
- Whole-brain analysis identified other areas of differing activity between groups.
Conclusions:
- Adolescent depression is associated with abnormal amygdala hyperactivity.
- Existing adult depression models may be applicable to adolescents.
- Neuropsychiatric interventions for adults warrant investigation in adolescents.
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