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Increased anticipatory contingent negative variation in posttraumatic stress disorder
Hongxia Duan1, Li Wang2, Guillén Fernández3
1Key Laboratory of Behavioral Science, Institute of Psychology, Chinese Academy of Sciences, Beijing, China; University of Chinese Academy of Sciences, Beijing, China; Donders Institute for Brain, Cognition and Behavior, Department for Cognitive Neuroscience, Radboud University Medical Centre, Nijmegen, The Netherlands, The Netherlands.
Biological Psychology
|March 12, 2016
Summary
Individuals with posttraumatic stress disorder (PTSD) exhibit heightened anticipation, indicated by larger contingent negative variation (CNV) brain activity. Despite this heightened alertness, PTSD patients show impaired performance on cognitive tasks.
Area of Science:
- Neuroscience
- Psychiatry
- Trauma Studies
Background:
- Anticipation processes are altered in various clinical conditions.
- Research on anticipation deficits in posttraumatic stress disorder (PTSD) is limited.
- Understanding these processes is crucial for PTSD diagnosis and treatment.
Purpose of the Study:
- To investigate anticipation processes in individuals with PTSD.
- To measure contingent negative variation (CNV) in PTSD patients.
- To correlate CNV amplitude with PTSD symptom severity and behavioral performance.
Main Methods:
- Utilized a choice reaction time paradigm.
- Measured contingent negative variation (CNV) in 58 Wenchuan earthquake survivors (28 with PTSD, 30 without).
- Assessed behavioral performance (reaction time, errors) and PTSD symptom severity.
Main Results:
- The PTSD group exhibited significantly larger CNV amplitude compared to the non-PTSD group.
- No significant difference in reaction times was observed; however, the PTSD group made more errors.
- PTSD symptom severity and re-experiencing symptoms positively correlated with CNV amplitude.
Conclusions:
- Individuals with PTSD may display heightened environmental anticipation.
- This heightened anticipation is associated with increased cognitive errors.
- Findings suggest a neurophysiological basis for altered anticipatory processes in PTSD.
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