A depressed brain often shows structural changes like shrinkage (atrophy) in areas such as the hippocampus (memory) and prefrontal cortex (mood/decision-making), along with functional differences like reduced activity in reward centers and overactivity in the amygdala (threat detection), all impacting memory, emotion, and cognitive functions due to altered neurotransmitter levels and impaired neuroplasticity.
There's growing evidence that several parts of the brain shrink in people with depression. Specifically, these areas lose gray matter volume (GMV). That's tissue with a lot of brain cells. GMV loss seems to be higher in people who have regular or ongoing depression with serious symptoms.
Treatment for MDD
“When depression is treated effectively, many people experience a resolution of the cognitive changes, suggesting that these changes may not be permanent,” Kristinsson says. The gold standard of treatment is a combination of medication and psychotherapy.
It's thought that your chance of getting severe depression may be partly affected by the genes you inherit from your parents.
Alterations in Brain Regions
The prefrontal cortex, responsible for executive functions like decision-making and impulse control, often shows reduced activity in depressed individuals. This decrease could contribute to difficulties in concentration and decision-making that many depressed individuals experience.
A PET scan can compare brain activity during periods of depression (left) with normal brain activity (right). An increase of blue and green colors, along with decreased white and yellow areas, shows decreased brain activity due to depression.
Depression can show up physically, including “sagging face,” fine lines, jowls, acne, and flare-ups like eczema or psoriasis—often linked to ongoing psychological stress and stress-hormone effects on the body.
Vitamin B-12 and other B vitamins play a role in making brain chemicals that affect mood and other brain functions. Low levels of B-12 and other B vitamins and folate may be linked to depression.
New evidence shows that people who maintain a range of healthy habits, from good sleep to physical activity to strong social connections, are significantly less likely to experience depression.
Considerable evidence links the “Big Five” personality traits (neuroticism, extroversion, conscientiousness, agreeableness, and openness) with depression.
Depression often gets worse if it isn't treated, resulting in emotional, behavioral and health problems that affect every area of your life. Examples of complications associated with depression include: Excess weight or obesity, which can lead to heart disease and diabetes. Pain or physical illness.
Perception and sensation symptoms of TBI
Depression and anxiety are associated with deficiency of neurotransmitters (monoamines) and abnormal functioning of their receptors. Disruption of the systems of the three neurotransmitters, serotonin, norepinephrine and dopamine, can have effects on different areas of the brain.
Clinical depression (major depressive disorder) can greatly interfere with your daily functioning and quality of life if it's not treated. People with clinical depression are at a high risk of developing anxiety disorders and substance use disorders, which further increase their risk of suicide.
Signs and symptoms
It's normal to feel sadness, grief, or low energy at times, but depression differs from the regular bout of emotion. Depression can cause you to lose interest in activities you've always enjoyed, withdraw from loved ones, and create a prolonged feeling of hopelessness.
Don't drink too much alcohol
For some people, alcohol can become a problem. You may drink more than usual as a way of coping with or hiding your emotions, or just to fill time. But alcohol won't help you solve your problems and could also make you feel more depressed.
The "5 R's of Depression" refer to key stages in the illness's course and treatment: Response (symptom improvement), Remission (few symptoms left), Recovery (sustained remission/symptom-free), Relapse (symptoms return before full recovery), and Recurrence (a new episode after full recovery). Understanding these stages helps track progress, prevent setbacks, and manage expectations in dealing with major depressive disorder, notes Psychology Today https://www.psychologytoday.com/au/blog/two-takes-on-depression/201103/depression-do you-know-all-your-rs and the Eisenberg Family Depression Center.
feeling tearful. feeling guilt-ridden. feeling irritable and intolerant of others. having no motivation or interest in things.
5 foods that help fight depression
Stressful life events: Difficult experiences, such as the death of a loved one, trauma, divorce, isolation and lack of support, can trigger depression. Medical conditions: Chronic pain and chronic conditions like diabetes can lead to depression. Medication: Some medications can cause depression as a side effect.
Feelings of guilt, worthlessness, or helplessness. Loss of interest or pleasure in hobbies and activities. Fatigue, lack of energy, or feeling slowed down. Difficulty concentrating, remembering, or making decisions.
Reduced Facial Expressions:
One of the most common facial signs of depression is a decrease in facial expressions, often referred to as "flat affect." Individuals with depression may show less movement in their facial muscles, resulting in a lack of smiles or frowns that typically convey emotions.
Immediate hospitalization is essential for those who express suicidal ideation or have attempted self-harm. Severe Functional Impairment: Moreover, patients unable to care for themselves, including neglecting personal hygiene, nutrition, or medications, often require hospital-based treatment.
Mental Health Conditions: Depression and Anxiety