Autonomic and cortical reactivity in acute and chronic posttraumatic stress
Kim L Felmingham, Chris Rennie, Evian Gordon, Richard A Bryant
BIOLOGICAL PSYCHOLOGY | ELSEVIER | Published : 2012
This study investigated attention (P300 amplitude) and orienting (skin conductance amplitude) to auditory tones in a standard oddball task in early trauma-exposed groups (Acute Stress Disorder: ASD) (n=12) or no ASD (n=13), compared to individuals with chronic posttraumatic stress disorder (PTSD) (n=17) and non-trauma-exposed controls (n=17). Individuals with ASD displayed significantly higher SCR and P3 amplitudes to target tones than individuals with PTSD, non-traumatized controls, and traumatized controls. These findings suggest that attention and orienting responses are greater to neutral, task-relevant target tones in ASD than PTSD and traumatized and non-traumatized controls.
Awarded by NHMRC
This project was funded by an NHMRC Program Grant (300304).