How Depression Affects the Brain

Depressive disorder (also known as depression) is a serious mental illness that affects the way you feel, the way you think, and the way you act no matter what age, gender, or background. Depression is not the same as regular mood swings and everyday feelings. It can have an impact on all components of life, including interactions with friends, family, and the local community. It may be the cause of or lead to issues at work and in the classroom. 

 Some of the psychological symptoms of depression include;

• continuous low mood or sadness
• feeling hopeless and helpless
• having low self-esteem
• feeling tearful
• feeling guilt-ridden
• feeling irritable and intolerant of others
• having no motivation or interest in things
• finding it difficult to make decisions
• not getting any enjoyment out of life
• feeling anxious or worried
• having suicidal thoughts or thoughts of harming yourself

The physical symptoms of depression include;

• moving or speaking more slowly than usual
• changes in appetite or weight (usually decreased, but sometimes increased)
• constipation
• unexplained aches and pains
• lack of energy
• low sex drive 
• changes to your menstrual cycle
• disturbed sleep – for example, finding it difficult to fall asleep at night or waking up very early in the morning.

While these are the signs of depression that are most frequently recognized, other individuals may also experience identical symptoms that manifest in various ways. Following extended emotional symptoms of depression, it is also typical for people to feel body pains, stomach pains, indigestion, headaches, and other physical ailments.

How it affects the brain

Depression affects the brain in several ways. One of the most important ways is through the regulation of neurotransmitters, such as serotonin, norepinephrine, dopamine, and GABA. These chemicals are essential in regulating mood, anxiety, stress, and pleasure. In people with depression, there is often an imbalance in these neurotransmitters, leading to symptoms such as low mood, irritability, and anxiety. Additionally, depression can cause structural changes in the brain, including a reduction in the size of the hippocampus, which is involved in memory and learning. There is also evidence that depression can cause inflammation in the brain, which can lead to further damage. Finally, depression can affect neuroplasticity, which is the brain's ability to change and adapt over time. This can lead to further changes in brain structure and function.

Effects on neurotransmitters.

Additionally, depression can decrease the production of certain neurotransmitters, such as serotonin and dopamine, which are involved in regulating mood and pleasure. Depression can also cause changes in the brain's white matter, which is responsible for transmitting signals between different parts of the brain. This can lead to problems with cognitive functioning, such as difficulty with attention, memory, and decision-making. Over time, chronic depression can lead to more severe changes in the brain, including a reduction in the size of the hippocampus and an increase in inflammation, which can further exacerbate symptoms.

Changes in white matter

Depression has been shown to cause changes in the white matter of the brain. White matter is made up of nerve fibers that connect different regions of the brain, and it plays a crucial role in communication between brain regions. Studies have found that people with depression have reduced white matter integrity, which can affect the efficiency of communication between brain regions. Specifically, depression has been associated with reduced white matter volume in the prefrontal cortex, which is involved in decision-making, attention, and working memory. Additionally, depression has been associated with reduced white matter integrity in the limbic system, which is involved in emotion regulation. These changes in white matter can contribute to the symptoms of depression, such as cognitive impairment, emotional dysregulation, and decreased motivation

Changes in grey matter

Depression has been shown to cause changes in the grey matter of the brain. Grey matter is the part of the brain that contains the cell bodies of neurons, and it plays a crucial role in information processing and decision-making. Studies have found that people with depression have reduced grey matter volume in several regions of the brain, including the prefrontal cortex, hippocampus, and amygdala. The prefrontal cortex is involved in decision-making, attention, and working memory, while the hippocampus is involved in memory and learning. The amygdala is involved in emotional regulation and the stress response. These changes in grey matter can contribute to the symptoms of depression, such as cognitive impairment, emotional dysregulation, and decreased motivation. However, the exact mechanisms by which depression affects grey matter are not yet fully understood, and more research is needed to develop new treatments for depression.

On a piece of paper

Task 1 

• Write a short paragraph or a few sentences on how depression affects the brain

Task 2

• What are some of the symptoms of depression?

Task 3

• A short summary of changes in white matter and grey matter

-Task 1: 10 points

-Task 2: 10 points 

-Task 3: 10 points 

Total: 30 points 

Congratulations! you have completed the web quest on how depression affects the brain, the symptoms of depression, the effects on neurotransmitters, and changes in white matter and grey matter.