Mental Illness and Mental
How do we define a mental disorder
• The definition is somewhat subjective because
it is based on social norms.
• Generally when behaviours make it hard to
function in normal society it is classified as a
• Mental disorders may also be defined by a
person not taking the normal development
• About 1 in 5 people have a mental disorder.
Types of Mental Disorders
• Anxiety disorders – PTSD, social anxiety.
• Affective disorders – mood disorders: e.g.
depression, mania and bipolar disorder.
• Psychotic disorders – e.g. schizophrenia (this
is often confused with multiple personality
disorder in common speech).
• Personality disorders – paranoid, obsessive
• Sleep disorders - insomnia
• Sexual disorders – psychological impotence,
gender identity etc.
• Impulse disorders – gambling, drugs etc.
Less common types
• Adjustment disorder: Extreme difficulty adjusting to stressful
• Dissociative disorders: e.g. Multiple personalities.
• Factitious disorders: Factitious disorders are conditions in
which physical and/or emotional symptoms are created in order
to place the individual in the role of a patient or a person in
need of help.
• Somatoform disorders: A person with a somatoform disorder,
formerly known as psychosomatic disorder, experiences
physical symptoms of an illness even though a doctor can find
no medical cause for the symptoms.
• Tic disorders: People with tic disorders make sounds or
display body movements that are repeated, quick, sudden,
and/or uncontrollable. (Sounds that are made involuntarily are
called vocal tics.) Tourette's syndrome is an example of a tic