I will do it laterPosttraumatic stress disorder: A syndrome experienced by many people who have survived traumas.

Acute stress disorder: This is another disorder associated with traumas recognized by the DSM-IV. Acute stress disorder occurs in response to traumas like PTSD and has similar symptoms to PTSD. The main difference is that acute stress disorder occurs with 1 month of exposure to the stressor and it is short-lived, not lasting more than four weeks. Also in acute stress disorder, dissociative symptoms are especially prominent.

Dissociative symptoms: These are symptoms that indicate a detachment from the trauma and from ongoing events. These are especially prominent in acute stress disorder.

Systematic desensitization: this is a major element of cognitive-behavioral therapy for PTSD. The client identifies those thoughts and situations that create anxiety, ranking them from most anxiety-provoking to least. The therapist then begins to take the client thorough this hierarchy, using relaxation techniques to quell anxiety.

Thought stopping: some therapists argue that for PTSD sufferers who cannot find any meaning in their traumas or resolve their traumas, it is more useful to help them find ways of blocking their intrusive thoughts. Thought stopping techniques may include the client yelling “No!” loudly when he realizes he is thinking about the trauma or learning to engage in positive activities that distract thoughts away from the trauma.

Stress-management interventions: thought-stopping techniques are often combined with stress-management interventions that teach clients skills for overcoming problems in their lives that are increasing their stress and that may be the result of PTSD, such as marital problems or social isolation.

Bipolar disorder: Bipolar disorder is one of the two major types of mood disorders. It is a disorder in which an individual alternates between states of deep depression and extreme elation. This is also known as...