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What is dissociative amnesia?
Dissociative amnesia, formerly called psychogenic amnesia, is one of a group
of conditions called dissociative disorders. Dissociative disorders are mental
illnesses that involve disruptions or breakdowns of memory, consciousness or
awareness, identity and/or perception—mental functions that normally operate
smoothly. When one or more of these functions is disrupted, symptoms can result.
These symptoms can interfere with a person’s general functioning, including
social and work activities, and relationships.
Dissociative amnesia occurs when a person blocks out certain information,
usually associated with a stressful or traumatic event, leaving him or her
unable to remember important personal information. With this disorder, the
degree of memory loss goes beyond normal forgetfulness and includes gaps in
memory for long periods of time or of memories involving the traumatic event.
Dissociative amnesia is not the same as simple amnesia, which involves a loss
of information from the memory, usually as the result of disease or injury to
the brain. With dissociative amnesia, the memories still exist but are deeply
buried within the person’s mind and cannot be recalled. However, the memories
might resurface on their own or after being triggered by something in the person’s
surroundings.
What causes dissociative amnesia?
Dissociative amnesia has been linked to overwhelming stress, which might be
the result of traumatic events—such as war, abuse, accidents or disasters—that
the person has experienced or witnessed. There also might be a genetic link to
the development of dissociative disorders, including dissociative amnesia, since
people with these disorders usually have close relatives who have had similar
conditions.
Who develops dissociative amnesia?
Dissociative amnesia is more common in women than in men. The frequency of
dissociative amnesia tends to increase during stressful or traumatic periods,
such as during wartime or after a natural disaster.
What are the symptoms of dissociative amnesia?
The primary symptom of dissociative amnesia is the sudden inability to
remember past experiences or personal information. Some people with this
disorder also might appear confused and suffer from depression and/or anxiety.
How is dissociative amnesia diagnosed?
If symptoms are present, the doctor will begin an evaluation by performing a
complete medical history and physical examination. Although there are no
laboratory tests to specifically diagnose dissociative disorders, the doctor
might use various diagnostic tests—such as X-rays and blood tests—to rule
out physical illness or medication side effects as the cause of the symptoms.
Certain conditions—including brain diseases, head injuries, drug and alcohol
intoxication, and sleep deprivation—can lead to symptoms similar to those of
dissociative disorders, including amnesia.
If no physical illness is found, the person might be referred to a
psychiatrist or psychologist, health care professionals who are specially
trained to diagnose and treat mental illnesses. Psychiatrists and psychologists
use specially designed interview and assessment tools to evaluate a person for a
dissociative disorder.
How is dissociative amnesia treated?
The first goal of treatment is to relieve symptoms and control any problem
behavior. Treatment then aims to help the person safely express and process
painful memories, develop new coping and life skills, restore functioning, and
improve relationships. The best treatment approach depends on the individual and
the severity of his or her symptoms. Treatments may include the following:
- Psychotherapy — This kind of therapy for mental and
emotional disorders uses psychological techniques designed to encourage
communication of conflicts and increase insight into problems.
- Cognitive therapy — This type of therapy focuses on
changing dysfunctional thinking patterns and the resulting feelings and
behaviors.
- Medication — There is no medication to treat the
dissociative disorders themselves. However, a person with a dissociative
disorder who also suffers from depression or anxiety might benefit from
treatment with a medication such as an antidepressant or anti-anxiety medicine.
- Family therapy — This kind of therapy helps to teach the
family about the disorder and its causes, as well as to help family members
recognize symptoms of a recurrence.
- Creative therapies (art therapy, music therapy) — These
therapies allow the patient to explore and express his or her thoughts and
feelings in a safe and creative way.
- Clinical hypnosis — This is a treatment method that uses
intense relaxation, concentration and focused attention to achieve an altered
state of consciousness (awareness), allowing people to explore thoughts,
feelings and memories they may have hidden from their conscious minds. The use
of hypnosis for fixing dissociative disorders is controversial due to the risk
of creating false memories.
What is the outlook for people with dissociative amnesia?
The outlook depends on several factors, including the person’s life
situation, the availability of support systems and the individual’s response
to treatment. For most people with dissociative amnesia, memory returns with
time, making the overall outlook very good. In some cases, however, the
individuals are never able to retrieve their buried memories.
Can dissociative amnesia be prevented?
Although it may not be possible to prevent dissociative amnesia, it might be
helpful to begin treatment in people as soon as they begin to have symptoms.
Immediate intervention after a traumatic event or emotionally distressing
experience can help to reduce the likelihood of dissociative disorders.
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