Freezing in Posttraumatic stress Disorder Patients while Watching affective Pictures
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منابع مشابه
Reduced Freezing in Posttraumatic Stress Disorder Patients while Watching Affective Pictures
Besides fight and flight responses, animals and humans may respond to threat with freezing, a response characterized by bradycardia and physical immobility. Risk assessment is proposed to be enhanced during freezing to promote optimal decision making. Indeed, healthy participants showed freezing-like responses to threat cues. Posttraumatic stress disorder (PTSD) patients are characterized by hy...
متن کاملIs freezing an adaptive reaction to threat? Evidence from heart rate reactivity to emotional pictures in victims of war and torture.
The influence of past traumatic experiences on the defense cascade in response to affective pictures was examined in survivors of war and torture. Trauma-exposed refugees with and without Posttraumatic Stress Disorder (PTSD) as well as healthy individuals viewed 75 pictures that varied in emotional content. Heart rate (HR) was recorded during the flickering stimulation of affective pictures in ...
متن کاملEffects of Systemic Administration of Oxytocin on Contextual Fear Extinction in a Rat Model of Post-Traumatic Stress Disorder
Introduction: One of the hallmark symptoms of posttraumatic stress disorder (PTSD) is the impaired extinction of traumatic memory. Single prolonged stress (SPS) has been suggested as an animal model of PTSD, since SPS rats exhibited the impaired fear extinction. Oxytocin (OXT) has been recently suggested as a potential pharmacotherapy for treatment of PTSD. In this study, using SPS rats we inve...
متن کاملEarly life stress and psychiatric disorder modulate cortical responses to affective stimuli.
Altered affective processing has been proposed as mediating between early life stress (ELS) and subsequent psychopathology. The present study examined whether ELS influences affective cortical processing differently in psychiatric patients and healthy subjects. The number of stressful experiences before onset of puberty was assessed in 50 inpatients with diagnoses of Major Depressive Disorder, ...
متن کاملEarly processing of threat cues in posttraumatic stress disorder-evidence for a cortical vigilance-avoidance reaction.
BACKGROUND The present study investigated the influence of posttraumatic stress disorder (PTSD) on early visual processing of affective stimuli in survivors of war and torture. METHODS Trauma-exposed refugees with (n = 36) and without (n = 21) PTSD as well as unexposed control subjects (n = 16) participated in a magnetoencephalography study with pictures that varied in emotional content. RE...
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تاریخ انتشار 2017