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I understand the car thing, I feel uncomfortable in big cities like London because I'm wary of everyone.I get that being followed thing and the shadows at the corner of your eyes (and flitting straight across).
Hypervigilance
is an increase in attention to threatening, potentially threatening, or trauma-relevant stimuli and is a widely reported symptom in post-traumatic stress disorder (APA, 2000). This symptom may have numerous manifestations including constant visual scanning for suspicious behavior in pubic places, an alertness for unusual sounds, noting of entrances and exits in enclosed places, constant checking of locks inside the home, or investigation of circumstances that seem out of the ordinary.![]()
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Hypervigilanceis also critical to theoretical characterizations of the disorder in which attentional biases toward threat is thought to be a central organizing feature in post-traumatic thought and behavior ([Chemtob et al., 1988], [Ehlers and Clark, 2000] and [Litz and Keane, 1989]). Such models posit that increased attentional bias to threat might maintain or even initiate other symptoms in the disorder such as intrusive memories, flashbacks, concentration difficulties, and avoidance behaviors.![]()
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The authors conclude that PTSD participants preferentially fixate on threat stimuli than do non-PTSD participants, particularly in the early stages of processing.
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In this study combat veterans higher in PTSD symptom reports had larger pupils and looked longer at negatively valenced material.
There was also a trend for those higher in PTSD scores to look first to negative pictures in general and combat pictures in particular. There was no data that would support avoidance of traumatic visual material either in early or late stage processing. This last conclusion is supported both by the first fixation data as well as the dwell time
data which show no avoidance of traumatic stimuli in veterans with PTSD. Rather, the data is consistent with attentional bias and hypervigilance for potentially threatening stimuli.
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Rather than avoidance, this pattern suggests an inability to disengage from threatening material in those higher in PTSD symptoms and highlights the ruminative quality of PTSD symptoms. In recent years, there has been increasing evidence to suggest that rumination plays an important role in predicting and maintaining PTSD symptoms (Ehring, Frank, & Ehlers, 2008;Michael, Halligan, Clark, & Ehlers, 2007; Steil & Ehlers, 2000). It has been suggested, for example, that ongoing intrusive memories and the playing out of unproductive ‘‘what if’’ scenarios are all associated with ongoing PTSD pathology.
It is also suggested in this work that these ruminative symptoms are the targets of patient initiated avoidance strategies that become dysfunctional in and of themselves. The fact that veterans higher in PTSD scores spent more time rather than less looking at negatively valenced pictures suggests that they could not disengage in a way that might minimize threatening input.