Bipolar Disorders Study Notes

Overview of Bipolar Disorders
  • Types of Bipolar Disorders:
    • Bipolar I:
    • History of at least one manic episode.
    • Major depressive episodes and hypomanic episodes are common but not necessary for diagnosis.
    • Bipolar II:
    • History of at least one hypomanic episode.
    • History of at least one major depressive episode.
    • No history of manic episodes.
    • Cyclothymic Disorder (Cyclothymia):
    • Numerous periods of hypomanic symptoms and periods of depressive symptoms without meeting criteria for major episodes for at least 2 years.
Criteria for Manic Episodes (DSM-5)

  • Part A:

    • Must have a distinct period of abnormally elevated, expansive, or irritable mood and increased goal-directed activity or energy.
    • Duration: at least 1 week (or less if hospitalized).

  • Part B: During the episode, 3+ (or 4+ if just irritable) of the following must be present:

    • Inflated self-esteem or grandiosity.
    • Decreased need for sleep.
    • Talkative or pressured speech.
    • Flight of ideas or racing thoughts.
    • Distractibility.
    • Increased goal-directed activity or psychomotor agitation.
    • Engaging in excessive or risky activities.

  • Part C:

    • Must include at least 1 of the following for classification as manic:
    • Marked impairment in social or occupational functioning.
    • Hospitalization necessary.
    • Presence of psychotic features (delusions/hallucinations).
Criteria for Hypomanic Episodes (DSM-5)

  • Parts A & B:

    • A distinct period of elevated, expansive, or irritable mood lasting at least 4 consecutive days.
    • Must present at least 3+ of the same symptoms as manic episodes.

  • Part E: Symptoms cannot include marked impairment in functioning, hospitalization, or psychotic features—otherwise, classified as mania.

Bipolar I vs. Bipolar II

  • Bipolar I:

    • Manic episodes are present; major depressive episodes usually occur but aren't required.
    • Age of onset: around 18-20 years.

  • Bipolar II:

    • Requires both a major depressive episode and a hypomanic episode; no manic episodes allowed.
    • Age of onset: 20-22 years.
Cyclothymic Disorder
  • Lasts for at least 2 years with numerous periods of hypomanic and depressive symptoms without meeting the criteria for major depressive, manic, or hypomanic episodes.
  • Average age of onset: 12-14 years; more common in females.
Course of Bipolar Disorder
  • Chronic with frequent episodes; 60% report occupational or interpersonal issues between episodes.
  • Recovery after the first episode is high but recurrence rates are significant (recurrence within 6 months for ~1/4 and within 4 years for ~3/4).
Prevalence and Gender Differences
  • Lifetime prevalence: 2-4% for any bipolar disorder; approximately 1% for Bipolar I in the US.
  • No significant gender difference for Bipolar I, but more females than males for Bipolar II.
Theories & Treatments

  • Neurotransmitter Factors:

    • Low serotonin can lead to mood disorders; combinations of serotonin and norepinephrine levels can determine the form of the disorder.
    • Bipolar I is characterized by high norepinephrine during manic episodes, low serotonin across both phases.

  • Genetic Factors:

    • Family studies indicate a strong hereditary component, with a significant increase in risk among first-degree relatives.
    • Identical twins have a 60% concordance rate.

  • Treatment Options:

    • Medications:
    • Lithium: First-line treatment; effective for manic episodes, may help in depression, has potential side effects (cognitive slowing, weight gain).
    • Other Medications: Anticonvulsants (Lamotrigine), atypical antipsychotics (Abilify, Seroquel, Risperdal), and antidepressants (with caution).

  • Psychosocial Approaches:

    • Goals include improving treatment adherence, sleep regulation, and stress management.
Additional Resources
  • Various videos discussing personal experiences with Bipolar I and bipolar stigma.