Mood Disorders - Bipolar Disorders Flashcards
DSM-5 criteria for bipolar I
- at least one manic episode
- hypomanic episodes often occur, but not necessarily
- major depressive episode usually occurs, but not necessarily
DSM-5 criteria for bipolar 2
- at lest one hypomanic episode
- no history of manic episode
- at least one major depressive episode
DSM-5 criteria for manic episode
- at least 3 of these (change from baseline)
1. inflated self-esteem or grandiosity
2. decreased need for sleep
3. talkative, pressured speech
4. flight of ideas, racing thoughts
5. distractible
6. increase in goal-directed activity or psychomotor agitation
7. excessive sensation-seeking/risky activity
8. irritability (*4 if this is one of them) - present most of the day for at least 1 week
- causes significant impairment in functioning or necessitates hospitalization
DSM-5 criteria for hypomanic episode
- at least 3 of these (change from baseline)
1. inflated self-esteem or grandiosity
2. decreased need for sleep
3. talkative, pressured speech
4. flight of ideas, racing thoughts
5. distractible
6. increase in goal-directed activity or psychomotor agitation
7. excessive sensation-seeking/risky activity
8. irritability (*4 if this is one of them) - present most of the day for at least 4 days
- symptoms do not cause marked impairment in social or occupational functioning
range of mood symptoms in bipolar disorders
- manic
- hypomanic
- normal
- dysthymic
- major depressioin
DSM-5 criteria for cyclothymic disorder
- milder hypomanic symptoms and milder depressed mood
- lasting at least 2 years
- no history of hypomanic, manic, or major depressive episode
mixed features diagnosis
- meets criteria for MDE and mania at least 1 week, nearly everyday
- refer to graph in notebook
rapid cycling
- 4+ mood episodes in given year
- poorer long-term prognosis
- about 1/3 with bipolar exhibit both mixed features and rapid cycling
evaluating mood symptoms//
- diagnosis = complicated
- brief depressive and hypomanic symptoms can occur in individuals without a mood disorder
- depression and irritability occur both in depressive and bipolar disorders
- people often fail to report hypomanic symptoms
prevalence of bipolar disorders: lifetime prevalence
- bipolar 1 = 0.4-1%
- bipolar 2 = 0.6-1.1%
- cyclothymia = 0.4-1%
prevalence of bipolar disorders: peak age of onset
- late adolescence
- early adulthood
prevalence of bipolar disorders: gender differences
- generally no sex difference for bipolar 1 and cyclothymia
- mixed data for bipolar 2
- rapid cycling and mixed features more common among women
prevalence of bipolar disorders: manic and hypomanic recurrence
- 50% of cases have recurrence within 1 year
- more than 50% of cases have 4 episodes
prevalence of bipolar disorders: comorbidity with SUD and anxiety
- women: higher rates of comorbid eating disorders and anxiety
- men: higher rates of comorbid SUD
prevalence of bipolar disorders: suicide and unemployment
- suicide risks of people living with bipolar are 20% higher than found in general population
- higher rates ofunemployment
etiology: biological
- heritability
- dysregulation in reward sensitivity
- neurotransmitter dysfunction
- functional and anatomical brain changes
heritability
- concordance rate: MZ=72%, DZ=14%
- 65% of the variability in bipolar is genetic
- complex genetic basis involving interactions among multiple genes
1. bipolar 1 share genetic vulnerabilities with schizophrenia
2. bipolar 2 strongly related to depressive disorders
dysregulation in reward system
- higher reward sensitivity + responding, leads to mania
- excessive activation of the behavioural activation system
- tendency to show anger and irritability in response to obstructed goals
neurotransmitter dysfunction
- higher glutamate level
- certain drugs can trigger manic symptoms, suggesting neurotransmitters may play a role (SSRIs)
functional and anatomical brain changes
- less activation in emotion regulation areas
- higher activation in emotional responsiveness areas
- reduced hippocampal volume and neurocognitive impairment
etiology: psychological
- coping with stress
- prone to rumination
- cognitive deficits
coping with stress
- individuals tend to cope with stress by disengagement
- tend to have limited adaptive coping and problem-solving skills
cognitive deficits
- problems in psychological flexibility in response to feedback
- difficulty resricting irrelevant info when trying to achieve a goal
- difficulty holding and manipulating info in mind
etiology: social and sociocultural
- early life stressors may lead to alterations in neurological functioning that increases vulnerability
- loss of social support or strained social relationships can trigger onset of hypomanic/manic/depressive symptoms