Manic Depression: Symtoms, Causes, Treatment, etc

Bipolar disorder, also known as manic-depression, is a psychiatric diagnosis referring to a mental health condition defined by periods of extreme, often inappropriate, and sometimes unpredictable mood states.

Bipolar individuals generally experience mania, hypomania or mixed states alternating with clinical depression and euthymic or normal range of mood over varied periods of time. There are many variations of this disorder. A person with bipolar disorder generally tends to experience more extreme states of mood than other people. Moods can change quickly (many times a day) or last for months. Bipolar individuals tend to have very 'black and white' thinking, where everything in life is either a positive aspect or a negative. Mood patterns of this nature are associated with distress and disruption, and a relatively high risk of suicide. Bipolar disorder is also associated with a variety of cognitive deficits, in particular, difficulty in organizing and planning. The disorder may also skew the ability to judge others' emotion, and alter sense of awareness. Bipolar individuals can be overly observant and analytical of their environment, and in some cases paranoid of others.

Bipolar disorder is usually treated with medications that help to stabilize mood, and/or therapy and counselling.

Some studies have suggested that while bipolar disorder alters emotion, there may be a correlation between creativity and bipolar disorder, although it is unclear what the relationship is between the two.

Aspects of bipolar disorder
Bipolar disorder is commonly categorised as either Bipolar Type I, where an individual experiences full-blown mania, or Bipolar Type II, in which the hypomanic "highs" do not go to the extremes of mania. The latter is much more difficult to diagnose, since the hypomanic episodes may simply appear as a period of successful high productivity and is reported less frequently than a distressing depression. Psychosis can occur, particularly in manic periods. There are also 'rapid cycling' subtypes. Because there is so much variation in the severity and nature of mood-related problems, the concept of a bipolar spectrum is often employed, which includes cyclothymia. There is no consensus as to how many 'types' of bipolar disorder exist (Akiskal and Benazzi, 2006). Many people with bipolar disorder experience severe anxiety and are very irritable (to the point of rage) when in a manic state, while others are euphoric and grandiose.


The Depressive Phase
Signs and symptoms of the depressive phase of bipolar disorder include (but in no way are limited to): persistent feelings of sadness, anxiety, guilt, anger, isolation and/or hopelessness, disturbances in sleep and appetite, fatigue and loss of interest in usually enjoyed activities, problems concentrating, loneliness, self-loathing, apathy or indifference, depersonalization, loss of interest in sexual activity, shyness or social anxiety, irritability, chronic pain (with or without a known cause), lack of motivation, and morbid/suicidal ideation].


Mania
People having a manic episode of mood can be elated, euphoric, irritated and/or suspicious. There will be an increase in physical and mental rate and quality. Increased energy and over-activity is common; speech can become racing. The need for sleep is reduced. Attention span is low and easily distracted. Unrealistic, grandiose or over optimistic ideas may be voiced or attempted. Social skills are impaired, and impractical ideas may lead to financial and relationship indiscretions.


Hypomania
Hypomania is generally a less destructive state than mania, and people in the hypomanic phase generally experience less of the symptoms of mania than those in a full-blown manic episode. The duration is usually also shorter than in mania. This is often a very 'artistic' state of the disorder, where there is a flight of ideas, extremely clever thinking, and an increase in energy.


Mixed state
In the context of bipolar disorder, a mixed state is a condition during which symptoms of mania and clinical depression occur simultaneously (for example, agitation, anxiety, aggressiveness or belligerence, confusion, fatigue, impulsiveness, insomnia, irritability, morbid and/or suicidal ideation, panic, paranoia, persecutory delusions, pressured speech, racing thoughts, restlessness, and rage).

Mixed episodes can be the most volatile of the bipolar states, as moods can easily and quickly be triggered or shifted. Suicide attempts, substance abuse, and self-mutilation may occur during this state.


Rapid cycling
Rapid cycling, defined as having four or more episodes per year, is found in a significant fraction of patients with bipolar disorder. It has been associated with greater disability or a worse prognosis, due to the confusing changeability and difficulty in establishing a stable state. Rapid cycling can be induced or made worse by antidepressants.


Cognition
Numerous studies show that bipolar disorder involves certain cognitive deficits or impairments, even in states of remission. Deborah Yurgelun-Todd of McLean Hospital in Belmont, Massachusetts has argued these deficits should be included as a core feature of bipolar disorder. According to McIntyre et al. (2006), "study results now press the point that neurocognitive deficits are a primary feature of BD; they are highly prevalent and persist in the absence of overt symptomatology. Although disparate neurocognitive abnormalities have been reported, disturbances in attention, visual memory, and executive function are most consistently reported."


Creativity
A number of recent studies have observed a correlation between creativity and bipolar disorder, although it is unclear in which direction the cause lies, or whether both conditions are caused by some third, unknown, factor. It has been hypothesized that temperament may be one such factor.


Suicide risk
Although many people with bipolar disorder who attempt suicide never actually complete it, the annual average suicide rate in males and females with diagnosed bipolar disorder (0.4%) is 10 to more than 20 times that in the general population

Individuals with bipolar disorder tend to become suicidal, especially during mixed states such as dysphoric mania and agitated depression. Persons suffering from Bipolar II have high rates of suicide compared to persons suffering from other mental illnesses, including Major Depression. Major Depressive episodes are part of the Bipolar II experience, and some have speculated that sufferers of this disorder spend much of their life in the depressive phase of the illness.


Divorce rate

According to Psychology Today, the divorce rate for couples where at least one spouse is bipolar is 90%. For comparison purposes, the general divorce rate is commonly held to be about half as much (around 50%), implying that this illness causes substantial additional burdens on married life.

Diagnosis

Diagnostic criteria
Flux is the fundamental nature of bipolar disorder. Both within and between individuals with the illness, energy, mood, thought, sleep, and activity are among the continually changing biological markers of the disorder. The diagnostic subtypes of bipolar disorder are thus static descriptions—snapshots, perhaps—of an illness in continual change, with a great diversity of symptoms and varying degrees of severity. Individuals may stay in one subtype, or change into another, over the course of their illness. The DSM V, to be published in 2011, will likely include further and more accurate sub-typing (Akiskal and Ghaemi, 2006).

There are currently four types of bipolar illness. The Diagnostic and Statistical Manual of Mental Disorders-IV-TR (DSM-IV-TR) details four categories of bipolar disorder, Bipolar I, Bipolar II, Cyclothymia, and Bipolar Disorder NOS (Not Otherwise Specified).

For a diagnosis of Bipolar I disorder according to the DSM-IV-TR, there requires one or more manic or mixed episodes. A depressive episode is not required for the diagnosis of Bipolar I disorder but it frequently occurs.

Bipolar II, which occurs more frequently is usually characterized by at least one episode of hypomania and at least one depression.

A diagnosis of Cyclothymic Disorder requires the presence of numerous hypomanic episodes, intermingled with depressive episodes that do not meet full criteria for major depressive episodes. The main idea here is that there is a low-grade cycling of mood which appears to the observer as a personality trait, but interferes with functioning.

If an individual clearly seems to be suffering from some type of bipolar disorder but does not meet the criteria for one of the subtypes above, he or she receives a diagnosis of Bipolar Disorder NOS (Not Otherwise Specified).

Although a patient will most likely be depressed when they first seek help, it is very important to find out from the patient or the patient's family or friends if a manic or hypomaniac episode has ever been present, using careful questioning. This will prevent misdiagnosis of Depressive Disorder and avoids the use of an antidepressant which may trigger a "switch" to hypomania or mania or induce rapid cycling. Recent screening tools such as the Hypomanic Check List Questionnaire (HCL-32) have been developed to assist the quite often difficult detection of Bipolar II disorders.


Treatment lag
The behavioral manifestations of bipolar disorder are often not understood by patients nor recognized by mental health professionals, so people may suffer unnecessarily for over 10 years in some cases before receiving proper treatment.

That treatment lag is apparently not decreasing, even though there is now increased public awareness of the illness in popular magazines and health websites. Recent TV specials, for example the BBC's The Secret Life of the Manic Depressive, MTV's True Life: I'm Bipolar, talk shows, and public radio shows, and the greater willingness of public figures to discuss their own bipolar disorder, have focused on mental illnesses thereby further raising public awareness.

Despite this increased focus, individuals are still commonly misdiagnosed.


Children
Main article: Bipolar disorder in children
Children with bipolar disorder do not often meet the strict DSM-IV definition. In pediatric cases, the cycling can occur very quickly (see section above on rapid cycling).

Children with bipolar disorder tend to have rapid-cycling or mixed-cycling. Rapid cycling occurs when the cycles between depression and mania occur quickly, sometimes within the same day or the same hour. When the symptoms of both mania and depression occur simultaneously, mixed cycling occurs.

Often other psychiatric disorders are diagnosed in bipolar children. These other diagnoses may be concurrent problems, or they may be misdiagnosed as bipolar disorder. Depression, ADHD, ODD, schizophrenia, and Tourette syndrome are common comorbid conditions.

Misdiagnosis can lead to incorrect medication. Incorrect medications can trigger mania and/or suicidal ideation and attempts.


Treatment
Main article: Treatment of bipolar disorder
Currently, bipolar disorder cannot be cured, though psychiatrists and psychologists believe that it can be managed.

The emphasis of treatment is on effective management of the long-term course of the illness, which usually involves treatment of emergent symptoms. Treatment methods include pharmacological and psychotherapeutic techniques.


Prognosis and long-term treatment
A good prognosis results from good treatment which, in turn, results from an accurate diagnosis. Because bipolar disorder continues to have a high rate of both under-diagnosis and misdiagnosis, it is often difficult for individuals with the illness to receive timely and competent treatment.

Bipolar disorder is a severely disabling medical condition. However, with appropriate treatment, many individuals with bipolar disorder can live full and satisfying lives. Persons with bipolar disorder are likely to have periods of normal or near normal functioning between episodes.

Ultimately one's prognosis depends on many factors, which are, in fact, under the individual's control: the right medicines; the right dose of each; a very informed patient; a good working relationship with a competent medical doctor; a competent, supportive, and warm therapist; a supportive family or significant other; and a balanced lifestyle including a regulated stress level, regular exercise and regular sleep and wake times.

There are obviously other factors that lead to a good prognosis, as well, such as being very aware of small changes in one's energy, mood, sleep and eating behaviors, as well as having a plan in conjunction with one's doctor for how to manage subtle changes that might indicate the beginning of a mood swing. Some people find that keeping a log of their moods can assist them in predicting changes.

The goals of long-term optimal treatment are to help the individual achieve the highest level of functioning while avoiding relapse.


Relapse
Even when on medication, some people may still experience weaker episodes, or have a complete manic or depressive episode. In fact, a recent study found bipolar disorder to be "characterized by a low rate of recovery, a high rate of recurrence, and poor interepisodic functioning." Worse, the study confirmed the seriousness of the disorder as "the standardized all-cause mortality ratio among patients with BD is increased approximately 2-fold." Bipolar disorder is currently regarded "as possibly the most costly category of mental disorders in the United States."

The following behaviors can lead to depressive or manic relapse:

Discontinuing or lowering one's dose of medication, without consulting one's physician.
Being under- or over-medicated. Generally, taking a lower dosage of a mood stabilizer can lead to relapse into mania. Taking a lower dosage of an antidepressant, may cause the patient to relapse into depression, while higher doses can cause destabilization into mixed-states or mania.
Taking hard drugs—recreationally or not—such as cocaine, alcohol, amphetamines, or opiates. These can cause the condition to worsen.
An inconsistent sleep schedule can destabilize the illness. Too much sleep (possibly caused by medication) can lead to depression, while too little sleep can lead to mixed states or mania.
Caffeine can cause destabilization of mood toward irritability, dysphoria, and mania. Anecdotal evidence seems to suggest that lower dosages of caffeine can have effects ranging from anti-depressant to mania-inducing.
Inadequate stress management and poor lifestyle choices. If unmedicated, excessive stress can cause the individual to relapse. Medication raises the stress threshold somewhat, but too much stress still causes relapse.
Relapse can be managed by the sufferer with the help of a close friend, based on the occurrence of idiosyncratic prodromal events That is, by noticing which moods, activities / behaviours or thinking process / thought content typically occur at the outset of their episodes. They can then take planned steps to slow or reverse the onset of illness, or take action to prevent the episode causing damage to important aspects of their life.


Research findings

Heritability or inheritance
The disorder runs in families. More than two-thirds of people with bipolar disorder have at least one close relative with the disorder or with unipolar major depression, indicating that the disease has a genetic component.

Studies seeking to identify the genetic basis of bipolar disorder indicate that susceptibility stems from multiple genes. Scientists are continuing their search for these genes, using advanced genetic analytic methods and large samples of families affected by the illness. The researchers are hopeful that identification of susceptibility genes for bipolar disorder, and the brain proteins they code for, will make it possible to develop better treatments and preventive interventions targeted at the underlying illness process.


Genetic research
Bipolar disorder is considered to be a result of complex interactions between genes and environment.

The monozygotic concordance rate for the disorder is 70%. This means that if a person has the disorder, an identical twin has a 70% likelihood of having the disorder as well. Dizygotic twins have a 23% concordance rate. These concordance rates are not universally replicated in the literature; recent studies have shown rates of around 40% for monozygotic and <10% for dizygotic twins (see Kieseppa, 2004 and Cardno, 1999).

In 2003, a group of American and Canadian researchers published a paper that used gene linkage techniques to identify a mutation in the GRK3 gene as a possible cause of up to 10% of cases of bipolar disorder. This gene is associated with a kinase enzyme called G protein receptor kinase 3, which appears to be involved in dopamine metabolism, and may provide a possible target for new drugs for bipolar disorder.


Ongoing research
The following studies are ongoing, and are recruiting volunteers:

The Maudsley Bipolar Twin Study, based at the Institute of Psychiatry in London is conducting research about the genetic basis of bipolar disorder using twin methodology. Currently recruiting volunteers: identical and non-identical twins pairs, where either one or both twins has a diagnosis of bipolar I or II.

The MRC eMonitoring Project, another research study based at the Institute of Psychiatry and Newcastle Universities, is conducting novel research on electronic monitoring methodologies (electronic mood diaries and actigraphy) for tracking bipolar symptom fluctuations in Bipolar individuals who are interested in self-managing their condition.

Medical imaging
Researchers are using advanced brain imaging techniques to examine brain function and structure in people with bipolar disorder, particularly using the functional MRI and positron emission tomography. An important area of neuroimaging research focuses on identifying and characterizing networks of interconnected nerve cells in the brain, interactions among which form the basis for normal and abnormal behaviors. Researchers hypothesize that abnormalities in the structure and/or function of certain brain circuits could underlie bipolar and other mood disorders, and studies have found anatomical differences in areas such as the prefrontal cortex and hippocampus.

Better understanding of the neural circuits involved in regulating mood states, and genetic factors such as the cadherin gene FAT linked to bipolar disorder, may influence the development of new and better treatments, and may ultimately aid in early diagnosis and even a cure


New treatments
In late 2003, researchers at McLean Hospital found tentative evidence of improvements in mood during echo-planar magnetic resonance spectroscopic imaging (EP-MRSI), and attempts are being made to develop this into a form which can be evaluated as a possible treatment.

NIMH has initiated a large-scale study at 20 sites across the United States to determine the most effective treatment strategies for people with bipolar disorder. This study, the Systematic Treatment Enhancement Program for Bipolar Disorder (STEP-BD), will follow patients and document their treatment outcome for 5-8 years. For more information, visit the Clinical Trials page of the NIMH Web site.

Transcranial magnetic stimulation is another fairly new technique being studied.

from wikipedia