Self-compassion, self-referential caudate circuitry, and adolescent suicide ideation

Area of Science:

• Neuroscience
• Psychiatry
• Developmental Psychology

Background:

• Suicide is a leading cause of death in adolescents, with depression as a key predictor.
• Identifying protective psychological factors against suicide ideation in depressed youth is crucial.
• Self-compassion shows an inverse association with suicide ideation, but its neural underpinnings are unclear.

Purpose of the Study:

• To investigate the neural mechanisms linking self-compassion and suicide ideation in adolescents.
• To examine the relationship between self-compassion, caudate functional connectivity, and suicide ideation.
• To explore these associations in both depressed and healthy youth.

Main Methods:

• Functional connectivity MRI was used in 79 depressed and 36 healthy adolescents during a self-referential task.
• Participants evaluated self-descriptive phrases from various perspectives.
• Self-compassion and suicide ideation were assessed using self-report and interview measures.

Main Results:

• Self-compassion correlated with increased left caudate functional connectivity with the posterior superior temporal sulcus/temporoparietal junction, left middle temporal gyrus (MTG), and left middle occipital gyrus during positive self-appraisals.
• Enhanced left caudate to left MTG connectivity mediated the association between higher self-compassion and lower suicide ideation.
• This mediation effect persisted even after controlling for depression severity, anxiety, and non-suicidal self-injurious behavior.

Conclusions:

• Left caudate to MTG functional connectivity during self-referential processing may be a neural biomarker for suicide ideation.
• Targeting this connectivity through interventions, alongside self-compassion training, could help reduce suicide ideation in depressed youth.