🧠 Shared Brain

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Singer Model — Oxytocin · Cortisol · Norepinephrine drive Empathy → Compassion → Altruism · NTU Neural Brain Paper

SINGER MODEL DECISION TREE

Witnessing Suffering

→ Theory of Mind — ACh / TPJ + mPFC

→ Affective Empathy — Ox + NE / Insula

Empathy Branches

→ Empathic Distress — Cortisol overload

→ Compassion — DA + Ox / Striatum

→ Sympathy / Pity — detached, low Ox

Compassion → Action

→ Altruism — DA + Ox / Reward Net

Self-less helping — neurochemical reward

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🫀 SN1 — Social Neuroscience Brain Singer Model v1.0