Cue-triggered retrieval
Sensory overlaps pull trauma fragments online.
Functionally, PTSD keeps the nervous system in “danger now” mode when cues overlap with trauma — even in objectively safe contexts.
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
Avoidance maintenance
Short-term relief prevents extinction learning.
Hypervigilant scanning
Continuous search for threat depletes attention.
Context failure
Poor “then vs now” discrimination.
Sleep fragmentation
Nightmares and arousal impair consolidation.
Safety relearning
Therapy-supported updating of threat predictions.
Networks
Amygdala threat85
Salience / dACC–insula75
Hippocampal context48
vmPFC regulation42
Default / autobiographical58
Amygdala threat
Hyper-responsivity to trauma-linked cues.
Salience / dACC–insula
Alarm and bodily vigilance.
Hippocampal context
Often relatively under-recruited for safe tagging.
vmPFC regulation
Safety signalling frequently reduced.
Default / autobiographical
Intrusive self-narrative fragments.
Examples
Smell triggering a flashback
Sensory cue without full narrative context.
Avoiding a street
Safety behaviour that blocks updating.
Night-time hypervigilance
Scanning sounds that exhaust sleep.
Therapist-guided exposure
Graded processing with safety and monitoring.
Compare radar scores with Anxiety and Memory pages; seek care for personal symptoms.
Sources & research
- Post-traumatic stress disorderPrimer on PTSD mechanisms and care.DOI
- Biological studies of post-traumatic stress disorderBiological synthesis of PTSD findings.DOI
- Post-Traumatic Stress DisorderClinical review of PTSD.DOI
Keep exploring
More in Disorders
🌫️
Alzheimer's Disease
Progressive dementia driven by protein pathology and network failure.
Research 74 🤲Parkinson's Disease
Dopamine circuit loss, movement symptoms and non-motor features.
Research 54 ⚡Stroke
Sudden vascular injury — time, territory and the race to recover.
Research 64 ⚡Epilepsy
Hyperexcitable networks, seizures and modern treatment options.
Research 95 🌧️Depression
Mood circuits, stress biology and evidence-based interventions.
Research 66 🌀Schizophrenia
Perception, belief and cognition when predictive models go awry.
Research 93 💢Migraine
Sensory gain, aura and the brain’s recurrent pain networks.
Research 74 📱ADHD
Attention control, impulsivity and developmental self-regulation.
Research 51 🧩Autism Spectrum
Neurodevelopmental diversity in social communication and sensory processing.
Research 89 🧬Multiple Sclerosis
Immune attack on myelin — disconnection across white-matter highways.
Research 80 🩹Traumatic Brain Injury
Mechanical insult, diffuse injury and the long arc of recovery.
Research 87 🔁Addiction
Compulsive seeking when reward prediction and control circuits tip.
Research 69 😰Anxiety
Threat circuitry, worry loops and avoidance — how brains over-predict danger and how care can recalibrate risk.
Research 86 ⚖️Bipolar Disorder
Mania, depression and the networks between — mood-state biology, sleep disruption and evidence-based stabilising care.
Research 84