The editors at Best Masters in Psychology Degrees decided to research the topic of:
THE SCIENCE OF MENTAL ILLNESS
More than 50 million Americans suffer from a mental illness or mental disorder. Because most of them are not severe and many go untreated, it may be helpful to understand the science behind what causes mental illness and how it manifests itself in everyday life.
Picture of Mental Health
1 in 4
- Adults with a mental illness
36%
- Those with a mental disorder who are receiving treatment
$57.5 billion
- Annual mental healthcare costs
Nearly 1 in 2
- People with mental disorders who fit the criteria for
multiple disorders
- Mood disorders - 9.5%
- Major
depressive disorder - 6.7%
- Dysthymic disorder - 1.5%
-
Bipolar disorder - 2.5%
- Anxiety disorders - 18.1%
-
Panic disorder - 2.7%
- Obsessive-compulsive disorder -
1.0%
- Post-traumatic stress disorder - 3.5%
-
Generalized anxiety disorder - 3.1%
- Social phobia - 6.8%
- Schizophrenia - 1.1%
What Happens in the Brain
- Those with a mental disorder who are receiving treatment
$57.5 billion
- Annual mental healthcare costs
Nearly 1 in 2
- People with mental disorders who fit the criteria for
multiple disorders
- Mood disorders - 9.5%
- Major
depressive disorder - 6.7%
- Dysthymic disorder - 1.5%
-
Bipolar disorder - 2.5%
- Anxiety disorders - 18.1%
-
Panic disorder - 2.7%
- Obsessive-compulsive disorder -
1.0%
- Post-traumatic stress disorder - 3.5%
-
Generalized anxiety disorder - 3.1%
- Social phobia - 6.8%
- Schizophrenia - 1.1%
What Happens in the Brain
- People with mental disorders who fit the criteria for multiple disorders
- Mood disorders - 9.5%
- Major depressive disorder - 6.7%
- Dysthymic disorder - 1.5%
- Bipolar disorder - 2.5%
- Anxiety disorders - 18.1%
- Panic disorder - 2.7%
- Obsessive-compulsive disorder - 1.0%
- Post-traumatic stress disorder - 3.5%
- Generalized anxiety disorder - 3.1%
- Social phobia - 6.8%
- Schizophrenia - 1.1%
What Happens in the Brain
Scientists who study mental illness believe an imbalance in brain chemicals contributes to the development of many disorders. Researchers suspect this imbalance impedes the brain's ability to move messages from neuron to neuron and for the brain's wiring to function normally. As a result of this breakdown, the brain may not communicate properly with the body, and a person may begin to show signs of mental illness.
Different chemicals have been associated with a variety of mental disorders:
Acetylcholine
- Too much: Depression
- Too little in the hippocampus: Dementia
Dopamine
- Too much: Schizophrenia
- Too little: Some forms of depression, muscular rigidity and tremors found in Parkinson's disease
Norepinephrine
- Too much: Schizophrenia
- Too little: Depression
Epinephrine
- Too little: Depression
Serotonin
- Too little: Depression and some anxiety disorders, especially obsessive-compulsive disorder. Some antidepressant medications increase the availability of serotonin at receptor sites.
GABA (Gamma-Amino Butyric Acid)
- Too little: Anxiety and anxiety disorders. Some anti-anxiety medication increases GABA at receptor sites.
Adrenaline
- Too much: Anxiety and anxiety disorders
What Happens in the Body
Mental illnesses may manifest themselves in a variety of ways for different people, but many symptoms are common.
Anxiety disorders
- heartbeat
- Lightheadedness
- Burning sensation on face, neck, ears, scalp or shoulders
- Nausea
- Twitching
- Weight loss/weight gain
Depression
- Headaches
- Back pain
- Muscle aches and joint pain
- Insomnia
- Chest pain
- Change in appetite
Schizophrenia
- Blank, vacant facial expression
- Overly acute senses
- Clumsy, inexact motor skills
- Insomnia or excessive sleeping
- Involuntary movements of the tongue or mouth
- Awkward gait
SOURCES
- WebMD.com
- www.nimh.nih.gov
- allpsych.com
- scientificamerican.com
