Brain ModelMap 24 – Conflict with Others
What happens in the brain when a disagreement with another person escalates – and how the brain oscillates between attack and withdrawal
Anatomically and biochemically
Interpersonal conflicts activate the brain's social threat system. The amygdala evaluates the other person's action or statement: a threat to one's own position, self-worth or a norm. This evaluation is fast – it happens before the full context is available. Simultaneously, the temporoparietal junction (TPJ; Theory-of-Mind area) calculates the other person's perspective: what did they mean? Did they act intentionally? This calculation is decisive – it determines whether the amygdala response escalates or is moderated.
When the TPJ calculates intent or malice, the amygdala escalates. Noradrenaline and cortisol rise. The anterior cingulate cortex (ACC) holds the conflict open. The anterior insula delivers the physical signal: tension, tightness, the impulse to respond. The dlPFC evaluates action options – but under the influence of noradrenaline and cortisol, the range is narrowed: attack or withdrawal dominate over nuanced responses.
Why is de-escalation so hard in the middle of a conflict? Because cortisol throttles dlPFC capacity – precisely the capacity needed for differentiated communication. Why can a brief pause defuse conflicts? Because noradrenaline and cortisol drop once the immediate confrontation ends. The dlPFC regains capacity. The TPJ can calculate a more complete perspective. What makes conflicts so persistent? The hippocampus stores them with high emotional valence. Future encounters with the person start with an amygdala-calibrated preset.
Examples from everyday life
- A misunderstanding escalates: The TPJ miscalculated intent. The amygdala escalates on the basis of an incomplete perspective.
- Conflict by e-mail: Written communication lacks tone and context – the TPJ must calculate more perspective from less data. Misinterpretations arise more frequently.
- Silence as a response: Withdrawal briefly dampens the amygdala – but the ACC holds the loop open. The conflict stays unprocessed.
- Criticism of the matter vs. the person: When the other person relates criticism to their person, the mPFC-sgACC circuit activates. The conflict intensifies.
- Resolution through perspective shift: When the TPJ takes the other person's full perspective – knowledge state, context, intent – the amygdala response drops measurably.
What this card does not say
This card describes a normal mechanism in the healthy human brain. Conflict is part of social interaction. This card is not a diagnostic tool and not a treatment guide.
