People with bipolar disorder (previously called manic-depressive
illness or manic depression) experience a cycle of mood swings
between depression and mania (elation). People with a more moderate
form of bipolar disorder experience hypomania, a less severe form
of mania. Both the manic and depressive phases vary widely in
intensity and duration. People with bipolar disorder often spend
more time in the depressive phase of illness than the manic or
hypomanic phase (see Depression for further description - link
here).
Common symptoms of bipolar disorders are:
- Emotional changes:
- Experiencing an elevated, expansive or irritable mood for at
least one week
- Rapid changes in mood between depression and mania, or a
mixture of both
- Moodiness
- Irritability or anger (1)
- Cognitive changes:
- Feeling excessively good about the self (inflated self
esteem)
- Exaggerated ideas about how important one is (grandiosity)
- Difficulty concentrating, paying attention and remembering
things
- Easily distracted or impulsive
- Having many ideas or thoughts at the one time (flight of
ideas)
- Behavioral changes:
- More talkative or having pressured speech
- Problems with work, social or family life
- Increased goal-directed activity where the goals are not
necessarily beneficial for the person (eg, focusing on a grandiose
idea like creating a new invention to the exclusion of everything
else)
- Involvement in pleasurable or risky activities that have the
potential for serious negative consequences (eg, excessive
spending, increased sexual activity)
- Increase in impulsivity
- Physical changes:
- Decreased need for sleep
- Changes in energy levels and appetite
Onset of bipolar disorder in young people
At least one in every 100 people will experience bipolar disorder
at some time during their lives. In Australia, approximately 0.7%
of males and 1.0% of females aged 18-24 have had bipolar disorder
in the previous 12 months (2).
Bipolar disorder is the ninth leading contributor to the burden
of disease and injury in Australian females aged 15-24, and the
tenth leading contributor for males (3).
Overall, about 50% of people who develop bipolar disorder will
do so by the time they are in their early to mid 20s (4).
Risk factors
A number of factors are known to increase the likelihood that a
person will develop bipolar disorder (5). These
include:
- Genetic vulnerability (for example, bipolar disorder in other
family members)
- Physiological or biological factors including complications
during gestation or birth, or abnormal regulation of daily
(circadian) rhythms
- Psychological factors including a childhood history of physical
or sexual abuse
- Experiencing stressful life events
References
1. Faust DS, Walker D, et al. Diagnosis and management of childhood bipolar
disorder in the primary care setting. Clin Pediatr (Phila).
2006 Nov;45(9): 801-808.
2. Mitchell PB, Slade T, et al. Twelve-month prevalence and disability of DSM-IV
bipolar disorder in an Australian general population survey.
Psychol Med. 2004 Jul;34(5): 777-785.
3. Australian Institute of Health and
Welfare. Youth Australians: their health and wellbeing.
2007 Cat. no. PHE 87. Canberra: AIHW.
4. Jablenskey A, McGrath J, et al. Psychotic disorders in urban areas: an overview of
the Study on Low Prevalence Disorders. Aust NZ J Psychiatry.
2000 Apr;34(2): 221-236.
55. Berk M, Conus P, et al. Setting the stage: From prodrome to treatment
resistance in bipolar disorder. Bipolar Disord. 2007 Nov;9(7):
671-678.