Depression - Symptoms, Causes and Treatment options
The main symptom of depression is sadness or low mood level, but many other mental and physical symptoms also occur. Here are symptoms, causes and treatment options explained.
Depression is a complex of psychological and physical symptoms. Low mood level or sadness is often the most prominent symptom. The common property of these symptoms is a decreased activity level in parts of the brain. The seriousness of depression varies from just bore some to very serious.
THE SYMPTOMS OF DEPRESSION
Depression may give one ore more of these symptoms:
-Low mood level or sadness.
-Lack of joy or interest in activities that was joyful before.
-Pessimism.
-Feel of guilt of something without any substantial reason to feel so.
-Inferiority thoughts
-Irritability
-Slowness in the thought process
-Slowness in interpreting sensorial stimuli.
-Slowness of digestion or other internal physical processes, and symptoms caused by this slowness, for example inflated stomach, constipation or difficulties by urination.
-Slow physical reactions.
Depression can be a mild disease that only causes some annoyance in the daily life, but can also get very serious and make a person totally unable to work and unable to participate in social life. By depression of some severity, there is also a greater risk of suicide. Depression can occur in all age classes. In teenagers lack of interest in school work, withdrawal from social life and difficult mood can be signs of depression.
THE PHYSIOLOGICAL CHANGES THAT PRODUCE THE SYMPTOMS
By depression there is a decrease in the amount of neurotransmitters in parts of the central nervous system, mainly deficiency of serotonin, but also to some extend of noradrenalin, acetylcholine, dopamine or gamma-amino-butyric acid (GABA), or the nerve cells do not react properly by stimulation from neurotransmitters. A neurotransmitter is a signal substance that transmits the nerve signal through the junctions between two nerve cells.
Serotonin and noradrenalin cause nerve cells to send impulses along to other nerve cells, and thus increase the activity in the brain. Deficiency of these substances causes slowness in parts of the brain, and that again causes the depressive symptoms.
The role of GABA is the opposite, namely to slow down some nerve impulses, mainly those causing anxiety and panic response. Lack of GABA causes higher anxiety and easier panic response. Yet, lack of this transmitter also seems to cause depressive symptoms. This is because a too high activity in some brain processes may slow down other processes, or cause exhaustion that in next turn slows down other processes.
However, there are many causes and subtypes of depression with different physiological mechanisms involved.
TYPES OF DEPRESSION
Depression is often divided into subtypes according to exhibited symptoms.
1. Mono-polar depression and dysthymic disorder
Mono-polar depression is a condition where the mental and physical depressive symptoms occur alone. Mild cases of mono-polar disorder that do not affect a persons ability to work and to participate in social activities are often called dysthymic disorder.
2. Bipolar disorder (manic-depressive disease) and cyclothymic disorder
In this condition the symptoms are swinging between symptoms of depression - the depressive phase, and the opposite - an elevated mood level with increased mental and physical activity - the manic phase. In the manic phase, the affected person also has poor sleep and concentration difficulties.
3. Manic disorder
This condition is characterized by abnormally elevated mood, by lack of sleep and by hyperactive behaviour. Many psychiatrists think that this disorder is simply the same disease as bipolar disorder where the depressive face has not yet occurred.
4. Depression with mainly physical symptoms
Sometimes the physical symptoms of depression are alone or dominant, as for example: Digestive problems, constipation, difficulties with urination, slow response to sensorial stimuli or slow physical reactions.
CAUSES OF DEPRESSION
There are many causes of depression, and two or more causes can have an effect simultaneously. Depression can be an independent disease, or a part of other diseases. Depression is also divided into different subtypes according to cause.
1. Reactive depression
This disease is simply a result from psychological stress, physical struggle or mental straining without proper rest or sleep over a long time period. The straining will simply wear out the nervous system or deplete the organism from nutrient necessary for the nervous system to work properly. Reactive depression will mostly be of the mono-polar type.
However, the modern society is in great extend guilty of producing this type of depression by exposing both adults, children and teenagers for stressful surroundings and stressful demands, and by hindering people from getting the rest they need to avoid and depression from exhaustion.
To say it even more clearly: Employers and schools are simply guilty of making both adults and children sick from depression.
2. Endogenous depression
When there has not been any period of stress, straining or lack of rest that cat explain the condition, the condition is often called endogenous depression. Inheritance is thought to be a part of the cause. Endogenous depression can be of the mono-polar or bipolar type.
3. Depression caused by physical disease
Depression or depressive symptoms may be a symptom of physical disease. This is perhaps the most common cause of depression. Generally there are three categories of diseases that give depression:
-Diseases that give a systemic chemical imbalance or systemic depletion of nutrients.
-Diseases that destroy brain tissue.
-Diseases with long lasting pain that stresses the nervous system.
Diseases often associated with depression are: Heart disease, Parkinson's disease, stroke, hypertension or Cushing's syndrome.
Mononucleosis or flu may trigger depression that continues after the infection has gone.
By lack of thyroid hormones, hypothyroidism, the metabolism in the whole body is slowed down, including the production of neurotransmitters in the brain. Therefore depression is an important symptom of hypothyroidism.
4. Depressive symptoms as a consequence of unsound lifestyle
A general unsound lifestyle with too less exercise, too much of stimulants like alcohol, coffee or tea, too less of important nutrient and too much of sugar and fat may give depressive symptoms, as well as physical problems.
5. Postnatal depression
Women will often have a period of depression after pregnancy and berth of the baby Pregnancy and berth is physically and mentally exhausting, and may drain the body for nutrient. This in turn can cause depressive symptoms
6. Seasonal affective disorder
Depression can occur in cold and dark periods of the year and go away in worm and light periods. Light stimulates brain activity, and lack of light is a causative factor.
7. Depression caused by hypothyroidism
Hypothyroidism is an inneffective production of thyroid hormons, or factors that hinder the produced hormones to work. The level of thyroid hormon determines the speed of metabolism and thereby the speed of many processes in the human organism, including the speed of processes in the brain. This will cause several brain functions to work slowly, which gives depression. Hypothyroidism also gives many other symptoms like constipation, inefficient memory, weight gain, brittle hair and nails, dry skin and hair, exhaustion and many more. All symptoms do not have to be present.
TREATMENT OF DEPRESSION
1 - Lifestyle adjustments
If the depression is a consequence of stress and straining, the depression can sometimes simply be treated with a period of rest, by slowing down the activity level and by adjusting the lifestyle to a less stressful level. However, this kind of depression my be more complicated and serious, and may also require specific medical treatment.
If you suspect you or your children are depressed because of the demands form school, work or the society as a whole, it can be necessary not only to reconsider your own life style, but also free yourself or your children from many of the demands from society.
Adjustment of lifestyle should always be considered by depression or depressive symptoms, even when the depression is caused mainly by other factors.
- To slow down a stressful life with too much work or activities.
- Enough rest and sleep.
- A good diet with enough of necessary nutrients.
- Some physical exercise.
2 - Pharmacological treatment
Serious or prolonged depression is usually treated with anti-depressive medication. Medicines used against depression, generally increase the level of neurotransmitters like serotonin and noradrenalin in the central nervous system, or they mimic the neurotransmitters.
The medications mostly used today increase the serotonine concentration by decreasing the removal of serotonine from the space around nerve cells. Examples of this medication type are: Fluoxetine (Prozac), fluvoxamine (Luvox), paroxetine (Paxil), escitalopram (Lexapro, Celexa), sentraline (zoloft).
By bipolar disorder in the manic face, heavy tranquilizers (neuroleptica) are used to stop the manic symptoms. By bipolar disorder, lithium salts are sometimes used to stabilize the condition, and prevent new outbreak of depressive or manic faces.
3 - Psychotherapy
Psychotherapy is sometimes used by depression, usually in combination with medication.
4 - Physical treatment methods
Sometimes serious depression is treated by applying electric shock through the head, electroconvulsive therapy. The shock induces epileptic eruption of nerve signals through the brain and this gives cramps throughout the body. The cramps are alleviated or stopped by applying anaesthesia before the electroshock. This form of treatment is controversial, since it can cause memory loss and is suspected of causing brain damage. The possibility of brain damage is however denied by most psychiatrists.
Deep transcranial magnetic stimulation (TMS) is a new tretment modality being developed. It ivolves sending pulsed magnetic fields towards the deep parts of the brain which then induses currents in these brain areas. It gives perhaps the same effects as electroconvulsive therapy, but in a more gentle way.
By seasonal depression, light therapy may be useful.
5 - Dietary supplements or stimulants
Dietary supplements may be of help against depresseio or depressive feelings.
- Supplement of vitamins, minerals, antioxidants. lecitine and essential fatty acids.
- Stimulants like coffee or tea may help against depressive feelings in moderate amount. However, if you are a heavy user of these stimulants, you should cut down on your consumption.
There exist nutritional products in the marked to help against depressive symptoms. These contain ingredients that the brain uses as building blocks for neurotransmitters, for example amino acids and lecitine. They also often contain vitamins and minerals that the brain uses as tools to produce neurotransmitters, especially vitamin B6.
Supplements may further contain herbal extracts that trigger higher brain activity much like anti-depressive medications, but may have fewer side effects.
By Knut Holt
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