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INTRODUCTION-
Depression is classified as a mood disorder. It may be described as feelings of sadness, loss, or anger that interfere with a person’s everyday activities.
It’s also fairly common. The Centers for Disease Control and Prevention (CDC) estimates that 8.1 percent of American adults ages 20 and over had depression in any given 2-week period from 2013 to 2016.
Depression is a common illness worldwide, with more than 264 million people affected(1). Depression is different from usual mood fluctuations and short-lived emotional responses to challenges in everyday life. Especially when long-lasting and with moderate or severe intensity, depression may become a serious health condition. It can cause the affected person to suffer greatly and function poorly at work, at school and in the family. At its worst, depression can lead to suicide. Close to 800 000 people die due to suicide every year. Suicide is the second leading cause of death in 15-29-year-olds.
Although there are known, effective treatments for mental disorders, between 76% and 85% of people in low- and middle-income countries receive no treatment for their disorder(2). Barriers to effective care include a lack of resources, lack of trained health-care providers and social stigma associated with mental disorders. Another barrier to effective care is inaccurate assessment. In countries of all income levels, people who are depressed are often not correctly diagnosed, and others who do not have the disorder are too often misdiagnosed and prescribed antidepressants.The burden of depression and other mental health conditions is on the rise globally. A World Health Assembly resolution passed in May 2013 has called for a comprehensive, coordinated response to mental disorders at the country level.

CAUSES-
There are several possible causes of depression. They can range from biological to circumstantial.
Common causes include:
- Family history. You’re at a higher risk for developing depression if you have a family history of depression or another mood disorder.
- Early childhood trauma. Some events affect the way your body reacts to fear and stressful situations.
- Brain structure. There’s a greater risk for depression if the frontal lobe of your brain is less active. However, scientists don’t know if this happens before or after the onset of depressive symptoms.
- Medical conditions. Certain conditions may put you at higher risk, such as chronic illness, insomnia, chronic pain, or attention-deficit hyperactivity disorder (ADHD).
- Drug use. A history of drug or alcohol misuse can affect your risk.
other risk factors for depression include:
- low self-esteem or being self-critical
- personal history of mental illness
- certain medications
- stressful events, such as loss of a loved one, economic problems, or a divorce
Many factors can influence feelings of depression.
Types and symptoms-
Depending on the number and severity of symptoms, a depressive episode can be categorized as mild, moderate or severe.
A key distinction is also made between depression in people who have or do not have a history of manic episodes. Both types of depression can be chronic (i.e. over an extended period) with relapses, especially if they go untreated.
Recurrent depressive disorder: this disorder involves repeated depressive episodes. During these episodes, the person experiences depressed mood, loss of interest and enjoyment, and reduced energy leading to diminished activity for at least two weeks. Many people with depression also suffer from anxiety symptoms, disturbed sleep and appetite, and may have feelings of guilt or low self-worth, poor concentration and even symptoms that cannot be explained by a medical diagnosis.
Depending on the number and severity of symptoms, a depressive episode can be categorized as mild, moderate or severe. An individual with a mild depressive episode will have some difficulty in continuing with ordinary work and social activities but will probably not cease to function completely. During a severe depressive episode, it is unlikely that the sufferer will be able to continue with social, work or domestic activities, except to a limited extent.
Bipolar affective disorder: this type of depression typically consists of both manic and depressive episodes separated by periods of normal mood. Manic episodes involve elevated or irritable mood, over-activity, pressure of speech, inflated self-esteem and a decreased need for sleep.

Depression test-
There isn’t a single test to diagnose depression. But your healthcare provider can make a diagnosis based on your symptoms and a psychological evaluation.
In most cases, they’ll ask a series of questions about your:
- moods
- appetite
- sleep pattern
- activity level
- thoughts
Because depression can be linked to other health problems, your healthcare provider may also conduct a physical examination and order blood work. Sometimes thyroid problems or a vitamin D deficiency can trigger symptoms of depression.
Don’t ignore symptoms of depression. If your mood doesn’t improve or gets worse, seek medical help. Depression is a serious mental health illness with the potential for complications.
If left untreated, complications can include:
- weight gain or loss
- physical pain
- substance use problems
- panic attacks
- relationship problems
- social isolation
- thoughts of suicide
- self-harm
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Contributing factors and prevention-
Depression results from a complex interaction of social, psychological and biological factors. People who have gone through adverse life events (unemployment, bereavement, psychological trauma) are more likely to develop depression. Depression can, in turn, lead to more stress and dysfunction and worsen the affected person’s life situation and depression itself.
There are interrelationships between depression and physical health. For example, cardiovascular disease can lead to depression and vice versa.Prevention programmes have been shown to reduce depression. Effective community approaches to prevent depression include school-based programmes to enhance a pattern of positive thinking in children and adolescents. Interventions for parents of children with behavioural problems may reduce parental depressive symptoms and improve outcomes for their children. Exercise programmes for the elderly can also be effective in depression prevention.
Types of depression-
Depression can be broken into categories depending on the severity of symptoms. Some people experience mild and temporary episodes, while others experience severe and ongoing depressive episodes.
There are two main types: major depressive disorder and persistent depressive disorder.
Major depressive disorder
Major depressive disorder is the more severe form of depression. It’s characterized by persistent feelings of sadness, hopelessness, and worthlessness that don’t go away on their own.
In order to be diagnosed with clinical depression, you must experience 5 or more of the following symptoms over a 2-week period:
- feeling depressed most of the day
- loss of interest in most regular activities
- significant weight loss or gain
- sleeping a lot or not being able to sleep
- slowed thinking or movement
- fatigue or low energy most days
- feelings of worthlessness or guilt
- loss of concentration or indecisiveness
- recurring thoughts of death or suicide
There are different subtypes of major depressive disorder, which the American Psychiatric Association refers to as “specifiers.”
These include:
- atypical features
- anxious distress
- mixed features
- peripartum onset, during pregnancy or right after giving birth
- seasonal patterns
- melancholic features
- psychotic features
- catatonia
Persistent depressive disorder
Persistent depressive disorder (PDD) used to be called dysthymia. It’s a milder, but chronic, form of depression.
In order for the diagnosis to be made, symptoms must last for at least 2 years. PDD can affect your life more than major depression because it lasts for a longer period.
It’s common for people with PDD to:
- lose interest in normal daily activities
- feel hopeless
- lack productivity
- have low self-esteem
Depression can be treated successfully, but it’s important to stick to your treatment plan.

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Treatment for depression
Living with depression can be difficult, but treatment can help improve your quality of life. Talk to your healthcare provider about possible options.
You may successfully manage symptoms with one form of treatment, or you may find that a combination of treatments works best.
It’s common to combine medical treatments and lifestyle therapies, including the following:
Medications
Your healthcare provider may prescribe:
- antidepressants
- antianxiety
- antipsychotic medications
Each type of medication that’s used to treat depression has benefits and potential risks.
Psychotherapy
Speaking with a therapist can help you learn skills to cope with negative feelings. You may also benefit from family or group therapy sessions.
Light therapy
Exposure to doses of white light can help regulate your mood and improve symptoms of depression. Light therapy is commonly used in seasonal affective disorder, which is now called major depressive disorder with seasonal pattern.
Alternative therapies
Ask your healthcare provider about acupuncture or meditation. Some herbal supplements are also used to treat depression, like St. John’s wort, SAMe, and fish oil.
Talk with your healthcare provider before taking a supplement or combining a supplement with prescription medication because some supplements can react with certain medications. Some supplements may also worsen depression or reduce the effectiveness of medication.
Exercise
Aim for 30 minutes of physical activity 3 to 5 days a week. Exercise can increase your body’s production of endorphins, which are hormones that improve your mood.
Avoid alcohol and drugs
Drinking or misusing drugs may make you feel better for a little bit. But in the long run, these substances can make depression and anxiety symptoms worse.
Learn how to say no
Feeling overwhelmed can worsen anxiety and depression symptoms. Setting boundaries in your professional and personal life can help you feel better.
Take care of yourself
You can also improve symptoms of depression by taking care of yourself. This includes getting plenty of sleep, eating a healthy diet, avoiding negative people, and participating in enjoyable activities.
Sometimes depression doesn’t respond to medication. Your healthcare provider may recommend other treatment options if your symptoms don’t improve.
These include electroconvulsive therapy (ECT), or repetitive transcranial magnetic stimulation (rTMS) to treat depression and improve your mood.

Physical Therapy Management
One of the biggest things a physical therapist can do for their patients is to be aware of the signs and symptoms of depression and some of the common disorders associated with depression. If the therapist is sensitive to the signs and symptoms of depression they can document it in the plan of care and then notify the physician so the patient can get the appropriate medical treatment, if necessary. Also, because patients with depression may be emotionally unstable, recognizing the signs and symptoms of depression can help you in approaching different situations and then redirecting the patient toward other activities, instructions or more positive topics of conversation.
Exercise has been shown to benefit patients with mild to moderate mood disorders, especially anxiety and depression. When performing aerobic exercise your body releases endorphins from the pituitary gland which are responsible for relieving pain and improving mood. These endorphins can also lower cortisol levels which have been shown to be elevated in patients with depression. Additionally, exercise increases the sensitivity of serotonin in the same way antidepressants work, allowing for more serotonin to remain in the nerve synapse. Exercise can be aerobic or resistive in nature, as both have been shown to be beneficial in a variety of patient types. Anyone with depression can participate in an exercise program no matter how old or young they are, as long as proper supervision is provided. Exercise is an excellent option for treatment when taking anti-depressants is not an option due to their side effects. Depression symptoms can be decreased significantly after just one session but the effects are temporary. An exercise program must be continued on a daily basis to see continued effects. As a person continues to exercise they may experiences changes in their body type which can help to improve self esteem and body image issues they may have been having. Some other benefits of regular physical exercise include:
- Reduces/prevents functional declines associated with ageing
- Maintains/improves cardiovascular function
- Aids in weight loss and weight control
- Improves function of hormonal, metabolic, neurologic, respiratory, and hemodynamic systems
- Alteration of carbohydrate/lipid metabolism results in favourable increase in high-density lipoproteins
- Strength training helps to maintain muscle mass and strength
- Reduces age-related bone loss; reduction in risk for osteoporosis
- Improves flexibility, postural stability, and balance; reduction in risk of falling and associated injuries
- Psychological benefits (preserves cognitive function, alleviates symptoms/behaviours of depression, improves self awareness, promotes sense of well-being)
- Reduces disease risk factors
- Improves functional capacity
- Improves immune function
- Reduces age-related insulin resistance
- Reduces incidence of some cancers
- Contributes to social integration
- Improves sleep pattern
Because of depression’s effect on the neuromusculoskeletal system, research has shown that treating a patient’s underlying depression can lead to better improvements in their pain. Physical therapists can implement other strategies into their practice to further improve the effects of therapy beyond the benefits of exercise.
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