Longitudinal changes in MMN and P3 during emotional processing in adolescents who engage in NSSI: a 12-week follow-up study - Report - MDSpire

Longitudinal changes in MMN and P3 during emotional processing in adolescents who engage in NSSI: a 12-week follow-up study

  • By

  • Jianqiang Bi

  • Pei Liu

  • Zhenpeng Xue

  • Xiujuan Li

  • Qiang Xu

  • Yanbin Jia

  • Jianping Lu

  • June 10, 2026

  • 0 min

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Clinical Report: Changes Over Time in MMN and P3 During Emotional Processing

Overview

This study investigates the effects of a 12-week clinical intervention on neurocognitive processing, specifically focusing on automatic negative bias and controlled evaluative processing in adolescents with nonsuicidal self-injury (NSSI).

Background

Nonsuicidal self-injury (NSSI) is a prevalent behavior among adolescents, often linked to emotional distress and significant psychosocial consequences. Understanding the neurocognitive mechanisms underlying NSSI is crucial for developing effective interventions. This study explores how clinical interventions can modify emotional processing in adolescents with NSSI, providing insights into potential biomarkers for treatment response.

Data Highlights

MeasureBaselineWeek 12p-value
Self-injury ideation daysData neededData needed0.036
NSSI episode frequencyData neededData needed0.007
MMN amplitude to negative stimuliData neededData needed0.047
P3 amplitude to negative stimuliData neededData needed0.027

Key Findings

  • The clinical intervention reduced self-injury ideation days and NSSI episode frequency significantly.
  • MMN amplitude to negative stimuli decreased, indicating reduced automatic salience detection.
  • P3 amplitude to negative stimuli increased, suggesting improved controlled evaluation of emotional information.
  • No significant changes were observed in responses to positive and neutral conditions.
  • Post-intervention correlations emerged between NSSI ideation days and positive P3 amplitude.
  • MMN and P3 may serve as biomarkers for tracking intervention responses in adolescents with NSSI.

Clinical Implications

The findings suggest that targeted clinical interventions can effectively modify neurocognitive processing in adolescents with NSSI. Clinicians may consider monitoring MMN and P3 as potential biomarkers to assess treatment efficacy and emotional processing improvements, integrating these measures into routine assessments.

Conclusion

This study highlights the potential of clinical interventions to alter neurocognitive processing in adolescents with NSSI, emphasizing the importance of understanding these mechanisms for effective treatment strategies, particularly in light of existing literature on emotion regulation.

Related Resources & Content

  1. BMC Psychiatry (Springer), 2025 -- Connections Between Non-Suicidal Self-Injury and Cognitive Impairments in Depressed Adolescents
  2. BMC Psychiatry (Springer), 2025 -- Altered Neural Function and Connectivity in the Hippocampus of Adolescents Engaging in Non-Suicidal Self-Injury
  3. Frontiers in Psychiatry, 2026 -- Task-state P300 and functional brain network abnormalities in adolescent major depressive disorder: a Stroop paradigm study
  4. Self-harm: assessment, management and preventing recurrence, NICE, 2025
  5. BMC Psychiatry (Springer) — A Biomarker for Niacin-Induced Flushing Exhibiting Disorder-Specific Multivariate Associations in Adolescent Unipolar and Bipolar Depression
  6. Nonsuicidal Self-Injury (NSSI) in Children and Adolescents - Pediatrics - Merck Manual Professional Edition
  7. Self-harm: assessment, management and preventing recurrence
  8. https://medicine.unimelb.edu.au/__data/assets/pdf_file/0004/5506816/SUMMARY-OF-RECOMMENDATIONS-Suicide-and-NSSI-in-Children-and-Adolescents-Evidence-based-CPG-2026.pdf
  9. Comparative efficacy and acceptability of psychotherapeutic, pharmacological, and combination treatments for non-suicidal self-injury in children and adolescents: a systematic review and network meta-analysis - PMC
  10. Frontiers | A study on the effects of combined DBT and STEPPS interventions for adolescents with non-suicidal self-injury: a randomized controlled trial
  11. Stratified Stepped-Care for Reducing Suicide Attempts and Self-Harm in Youth: A Randomized Clinical Trial - PubMed
  12. Frontiers | Longitudinal Changes in MMN and P3 during Emotional Processing in Adolescents Who Engage in NSSI: A 12-Week Follow-Up Study
  13. Frontiers | Electrophysiological characteristics in adolescents with non-suicidal self-injury: an event-related potential study and source analysis
  14. Mismatch negativity as a neurophysiological biomarker differentiating non-suicidal self-injury from suicidal behavior in depressed adolescents - ScienceDirect

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