Post-traumatic stress disorder is characterized by all Except
**Core Concept**
Post-traumatic stress disorder (PTSD) is a complex psychiatric condition that develops in some individuals following exposure to a traumatic event, such as combat, abuse, or a natural disaster. The disorder is characterized by symptoms involving the re-experiencing of the traumatic event, avoidance of stimuli associated with the trauma, and increased arousal and reactivity.
**Why the Correct Answer is Right**
PTSD is characterized by symptoms such as flashbacks, nightmares, and severe anxiety, as well as avoidance behaviors and changes in mood and cognition. The re-experiencing symptoms are thought to result from the persistent activation of the amygdala, a brain region involved in the processing of emotions, particularly fear. The avoidance symptoms are thought to be a coping mechanism to avoid the emotional distress associated with the traumatic event.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because PTSD is characterized by symptoms involving the re-experiencing of the traumatic event, not a lack of emotional response.
**Option B:** This option is incorrect because PTSD is characterized by symptoms involving avoidance behaviors, not increased motivation.
**Option C:** This option is incorrect because PTSD is characterized by symptoms involving increased arousal and reactivity, not decreased stress response.
**Clinical Pearl / High-Yield Fact**
A key feature of PTSD is the presence of "hyperarousal," which can manifest as difficulty sleeping, irritability, or an exaggerated startle response. This can be a critical clue in diagnosing PTSD in patients with a history of trauma.
**Correct Answer: A.**