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Post-traumatic Stress Disorder

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Post-traumatic stress disorder (PTSD) is a psychiatric condition that arises following exposure to traumatic events such as natural disasters, forced displacement, or severe accidents. It significantly impairs individuals' ability to cope with daily activities and disrupts their emotional and psychological equilibrium.
Symptoms and Behavioral Manifestations
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Psychological responses to stress encompass the various cognitive and emotional reactions individuals experience when faced with challenging or threatening situations, such as a job loss. Prolonged exposure to stressors can disturb emotional balance, increasing negative emotions (e.g., anxiety and sadness) and diminishing positive emotions (e.g., joy and satisfaction). These persistent emotional shifts are associated with an increased risk of both physical illness and mental health issues, such...
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Emotionally traumatic events often lead to memories that are exceptionally vivid and enduring, sometimes persisting with remarkable clarity throughout an individual's life. A classic example of this phenomenon is a person who survives a car accident. Even years later, they may recall every detail of the event with startling accuracy — the screeching of the tires, the jarring impact, and the acrid smell of burning rubber. Such vividness contrasts sharply with how an individual...
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Operant Conditioning Intervention01:24

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Operant conditioning serves as a foundational principle in therapeutic interventions aimed at modifying maladaptive behaviors. Central to this approach is the notion that behaviors, both adaptive and maladaptive, are learned through reinforcement. By analyzing the environmental factors that reinforce problematic behaviors, clinicians can design interventions to weaken these reinforcements and replace maladaptive behaviors with healthier alternatives.
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Decision Making01:20

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Decision-making is a fundamental cognitive process that involves evaluating alternatives and selecting among them. This process can range from simple choices, such as deciding what to wear, to complex decisions, like choosing a major in college or a career path. The complexity of the decision often dictates the approach we use, which can be broadly categorized into two types: automatic and controlled decision-making.
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The human brain processes information for decision-making using one of two routes: an intuitive system and a rational system (Epstein, 1994; popularized by Kahneman, 2011 as System 1 and System 2, respectively). The intuitive system is quick, impulsive, and operates with minimal effort, relying on emotions or habits to provide cues for what to do next, while the rational system is logical, analytical, deliberate, and methodical. Research in neuropsychology suggests that the...
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Biomarkers in an Animal Model for Revealing Neural, Hematologic, and Behavioral Correlates of PTSD
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Reward Processing and Decision-Making in Posttraumatic Stress Disorder.

Casey L May1, Blair E Wisco1

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Area of Science:

  • Neuroscience
  • Psychology
  • Clinical Psychology

Background:

  • Posttraumatic stress disorder (PTSD) is theorized to involve dampened positive emotion due to trauma reexperiencing.
  • Previous research linked positive emotion to reward processing, but the impact of trauma cues on reward processing and decision-making in PTSD remains understudied.

Purpose of the Study:

  • To investigate how trauma cues affect reward anticipation, satisfaction, and decision-making in individuals with PTSD.
  • To compare reward processing between individuals with PTSD and trauma-exposed controls.

Main Methods:

  • A wheel-of-fortune task with neutral and trauma inductions was administered to 24 individuals with PTSD and 29 trauma-exposed controls.
  • Participants completed passive and decision-making phases involving obviously advantageous, obviously disadvantageous, and ambiguously advantageous spinners.

Main Results:

  • The PTSD group exhibited lower reward expectation specifically for ambiguous spinners compared to controls.
  • Reward expectation was not influenced by prime type (neutral vs. trauma).
  • Outcome satisfaction was unaffected by PTSD or prime type.
  • Individuals with PTSD played ambiguous spinners less often and obviously disadvantageous spinners significantly less often, indicating a higher aversion to loss.

Conclusions:

  • Reward expectation deficits in PTSD appear more pronounced than outcome satisfaction deficits.
  • Findings suggest that individuals with PTSD may be more risk-averse, particularly concerning potential losses.
  • Future research should explore the role of reward-related decision-making in the psychopathology of PTSD.