Post-traumatic stress disorder: clinical and translational neuroscience from cells to circuits

Summary & key facts

This review describes what we know about post-traumatic stress disorder (PTSD) from clinical studies and brain research. It says PTSD causes re-experiencing, avoidance, negative thoughts and hyperarousal, and that these problems link to specific brain circuits (especially the amygdala, hippocampus and medial prefrontal cortex). The authors report that PTSD affects about 6–8% of people overall and up to 25% in groups exposed to severe trauma, that genetics account for roughly 30–40% of risk, and that combining genetic and circuit-level studies could help improve diagnosis and treatment in the future.

Key facts:

• PTSD affects about 6–8% of the general population and can reach about 25% in groups exposed to severe trauma (for example, some combat veterans, refugees or assault victims).
• At least 30–40% of the risk of developing PTSD is estimated to be heritable (linked to genetics).
• Core clinical features of PTSD listed in the review are re-experiencing traumatic events, avoidance, negative emotions and thoughts, and hyperarousal.
• The amygdala–hippocampus–medial prefrontal cortex circuit is identified as a key brain network involved in fear, threat responses and many PTSD symptoms.
• The review notes frequent comorbidity between PTSD and neurological conditions such as traumatic brain injury, post-traumatic epilepsy and chronic headaches.
• Sleep dysregulation and hyperarousal are highlighted as major symptom domains that translational neuroscience is increasingly able to explain.
• A cited large genome-wide association study (GWAS) with N = 20,070 found genetic overlap between PTSD and schizophrenia and reported sex differences in heritability.
• The authors state that combining molecular–genetic methods with mechanistic knowledge of fear circuitry may enable advances in how PTSD is conceptualized, diagnosed and treated, but this is presented as a research direction rather than a pr

Topics

Anesthesia and Neurotoxicity Research Memory and Neural Mechanisms Stress Responses and Cortisol

Categories

Cognitive Neuroscience Life Sciences Neuroscience

Tags

Acute Stress Disorder Amygdala Clinical neuroscience Clinical psychology Cognition Environmental health Medicine Neurology Neuroscience Population Posttraumatic stress Prefrontal cortex Psychiatry Psychology Traumatic stress

Conditions & symptoms

Anxiety Depression PTSD Sleep disorder Anxiety or worry Feeling disconnected from others Poor sleep