Threat appraisal
Estimate probability and cost of harm.
Functionally, anxiety is prediction under uncertainty biased toward false alarms — adaptive until avoidance shrinks life.
Educational neuroscience context only — not medical advice, diagnosis or a substitute for emergency or clinical care. If you are in crisis, seek local emergency services or a licensed clinician.
Processes
Attentional bias
Prioritise threat cues over neutral information.
Worry loops
Verbal problem-solving that rarely resolves.
Avoidance / safety behaviours
Reduce short-term distress, block learning.
Interoceptive amplification
Misread bodily signals as catastrophe.
Reappraisal / extinction
Update predictions when safety evidence accumulates.
Networks
Amygdala threat88
Salience / insula–ACC72
Frontoparietal control60
Default / rumination55
Brainstem arousal35
Amygdala threat
Rapid salience tagging of danger cues.
Salience / insula–ACC
Bodily prediction errors and affective conflict.
Frontoparietal control
Effortful regulation and attention shifting.
Default / rumination
Self-referential worry narratives.
Brainstem arousal
Autonomic drive that colours experience.
Examples
Scanning a crowd for threat
Attentional bias keeps danger hypotheses alive.
Avoiding a meeting
Safety behaviour blocks disconfirming evidence.
Catastrophising a heartbeat
Interoceptive misappraisal fuels panic spirals.
Graded exposure to lifts
New safety learning competes with old fear.
Compare radar scores with PTSD and Emotion pages; seek care for personal symptoms.
Sources & research
- Anxiety disordersPrimer on anxiety disorders and mechanisms.DOI
- Using Neuroscience to Help Understand Fear and Anxiety: A Two-System FrameworkTwo-system framing of fear vs anxiety circuits.DOI
- Epidemiology of anxiety disorders in the 21st centuryEpidemiology of anxiety disorders.DOI
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