Bipolar Disorder

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Bipolar Disorder: The Highs and the Lows

Bipolar disorder (BD) is a mental illness affecting people from different areas all over the world, in which a person experiences what many would call extreme mood fluctuations often for no apparent reason. Ranked seventh on the list of non-fatal illnesses, it is considered one of the most costly disorders to affect humans. This post will explore topics such as: the differences between BD I, BD II, and other similar mental illnesses such as borderline personality disorder and cyclothymic disorder, what it is like to live with this illness, the structural differences of an afflicted brain, the benefits of treatment, and the prognosis of the disorder.

People with BD tend to change moods more rapidly than someone in the general population, many times without warning. Many psychiatrists will refer to this as a patient’s lability. This cycling of “highs” and “lows” is a trademark symptom of someone with BD, but does not automatically mean someone meets the diagnostic criteria. Many times this might not be very noticeable; depending on the person, these moods may last for days, or even months. Both BD I and II areBipolar Disorder | Criminal Behavior similar in that moods tend to shift rapidly, but they do have their differences.

Those with bipolar I experience manic episodes. During a manic episode, which must last at least one week, someone may be excessively cheerful or euphoric; loud or rapid speech, extremely inflated self-esteem, and sexual promiscuity are not uncommon. If in a positive manic episode, the individual doesn’t see anything as being wrong, and their senses are often perceived as being much sharper than usual. Others may instead become very irritable or violent; they may engage in hostile behaviors, have temper tantrums, or become infuriated if interrupted. A depressive episode is not required for a diagnosis of BD I, although the majority of people that are diagnosed with BD I also experience depressive episodes at some point. Bipolar II is characterized as having hypomanic episodes, which are similar to that of a manic episode, just usually less pronounced, and only required to continue for at least four days. At least one episode of major depression is required for a diagnosis of BP II. In extreme cases, this may occur more than four times per year; being referred to as rapid cycling. 5-15% of individuals with BD II eventually have a manic episode, which then will result in a change of diagnosis to BD I. Because of the similar characteristics, a diagnosis is often confused between not only BD I and BD II, but other similar disorders.

If patients don’t meet the strict criteria of a manic, hypomanic, or major depressive episode, but do experience the same symptoms may then be given the diagnosis of cyclothymic disorder. Further adding to the confusion, borderline personality disorder (BPD) may be easily confused with the bipolar disorders due to the similar characteristics of both conditions. People are often misdiagnosed as having BD instead of the proper diagnosis of BPD, even though differences in the two have been found. For example, both have episodes of (hypo)mania or depression, although it has been shown those with BPD do not have the same emotional instability between these episodes as those with BD. The trigger for BPD is usually due to stimuli in the environment, while it is not always that way for BD. Further, the episodes with BPD rarely involve euphoria, while it is often seen in BD.

Along with the affective instability that is seen, those with bipolar disorders also have certain physiological differences in their brains. For example, it has been show there is a reduction in the size of the prefrontal cortex in those with the disorder, which is responsible for regulation of mood and emotions, as well as the integration between cognitive and emotional information; fMRI results show increased activation of the prefrontal cortex during verbal fluency tasks, but decreased activation during facial discrimination tasks. The striatum, and the lateral ventricles tend to be increased in size compared to the general population. An increased size in the amygdala has also been shown to be a characteristic of adults with BD, while teenagers with BD tend to have a reduced size; some researchers believe to suggest there is a disorder in the growth of the amygdala at puberty, which could contribute to development of the disorder later on in life. The amygdala is responsible for emotional comprehension as well as influencing production of emotional response. Differences in the size of the anterior cingulate and the hippocampus have also been noticed.

Aside from structural abnormalities of the brain, there are also chemical differences in the brain; this is determined by where in the cycle the patient may be. For example, during a major depressive episode, 5-hydroxyindoacutic acid (5-HIAA), the main metabolite to the neurotransmitter serotonin, is reduced in the cerebrospinal fluid of those afflicted. Dysfunction in the dopaminergic systems is also reported during both (hypo)manic and depressive episodes. Further, levels of the brain-derived neurotrophic factor, a special type of protein that promotes growth and maintaining neuronal function and connections, regulates neurotransmission, and plays a role in the ability to learn and long term memory storage, were shown to be reduced in periods of mania and depression.

Men and women diagnosed with BD both share the same general characteristics, but there are slight differences in how symptoms manifest. For example, the first episode at onset in males is 44% more likely to be a manic or hypomanic episode, while in females it is 78% more likely to be a major depressive episode. Statistically significant differences in the rates of comorbid diagnoses are also observed; Men with BD are more than twice as likely to be dependent on alcohol or marijuana, and four times more likely to have a co-occurring antisocial, or conduct disorder, or other behavioral problems. They are also reported to have more trouble holding a conversation during a (hypo)manic episode. On the other hand, women have higher reported rates of weight change and insomnia during episodes of depression. Also, women with BD are ten times more likely to develop an eating disorder within their lifetime

Due to the nature of this illness, bipolar disorder may cause problems in many aspects of a person’s life: friends/family, romantic relationships, career. Depending on how frequent or severe their episodes, may determine to what extent this illness can negatively affect their life or career. Compared to the general population, significantly more people with BD are single, have an income below the tenth percentile, or are on disability pension. The children of bipolar parents are also affected; they tend to have lower self-esteem, and a higher sensitivity to punishment, possible contributions to the development of the condition later on in life.

Criminal behavior in those with bipolar disorder may be due to any comorbid drug or alcohol abuse, along with the increased impulsivity that is common in these individuals. Those with bipolar disorder in which manic episodes are frequently experienced are at increased risk of repeat criminal offenses; several small studies have shown the proclivity for criminal behavior in BD to be similar to those with psychopathic tendencies.

Although are many people with bipolar disorders that live successful lives, with relatively little being carried over into their career life, approximately 30% of people with BD show severe impairment in work role function. How an individual approaches their illness, and whether they seek help also plays a role. Although there are some people who only have on episode in their lifetime, over 90% who have one manic episode will eventually go on to have more. It has been suggested that early identification and diagnosis, along with a plan of treatment may prevent a decline in social and occupational function. Ongoing depressive symptoms increase the risk of affective relapse and hurt the prognosis of the patient

The general consensus is that this condition is not only caused through physiological processes, but psychological, environmental, and social events can act as triggers or can even be used to help positively mediate the emotional responses. Mood stabilizers such as valproic acid, lithium, lamotigrine or carbamazepineare, are the main treatments used with those diagnosed with bipolar disorders. It has been shown that a combined approach consisting of pharmacological and behavioral therapy reduces depressive symptoms, and the number of hospitalizations in the lifetime of the patient Lithium-treated patients are noted to have larger amygdala, hippocampus and posterior subgenual geniculate cortex regions of the brain, suggesting pharmacological treatment may help counteract the loss of brain tissue which is associated with the disorder Although some treatment could reduce symptoms and improve the quality of life, 50-60% of patients with BD I fail to control symptoms with the use of lithium.

This review has shown how bipolar I and bipolar II differ from other similar illnesses such as borderline personality disorder or cyclothymic disorder, has given some examples of what it is like to have to live with this disorder, the risk of criminal behavior due to the illness, and showed the importance and benefits of treatment and how it can influence the prognosis of the condition. Bipolar disorder along with many other mental illnesses can be explained scientifically; there is a physical reason for their behavior. These brain abnormalities leave someone predisposed to certain behaviors; they may have less ability to control their actions than most of us would like to believe. A diagnosis of mental illness should be seen as a mitigating circumstance in the eyes of the court. An experienced criminal defense attorney may be able to make this argument in trial; the judicial system does not give as much weight to a diagnosis of mental illness as it should when determining the proper sentence upon conviction.

 

References

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