In short, physical and intellectual performances are driven and enhanced by anxiety: severe anxiety usually doesn"t go away. Causes: excessive emotional reactions come from multiple sources. Cultural influences: panic disorders exist worldwide, phobic avoidance was more common in panic disorder patients in north. Nocturnal panic: 60% of the people with panic disorder have experienced such nocturnal attacks, usually occur between 1:30- 3:30am. Isolated sleep paralysis are unable to move, your heart pounds as you stare at aspects of the room. Clinical description: gad is the basic syndrome that characterizes every anxiety disorder. Causes: gad tends to run in families, what seems to be inherited is the tendency to become anxious rather than. Individuals with gad do not respond as strongly as individuals with anxiety disorders in which panic is more prominent. Animal phobia: these fears are common but become phobic only if severe interference with functioning occurs, age of onset is 7.