Clinical Psychology: Mood Disorders and Bipolar Disorder

Clinical Psychology

Mood Disorders

Overview of Mood Disorders

  • Mood disorders include:

    • Bipolar and Related Disorders

    • Depressive Disorders

    • Major Depressive Disorder

    • Persistent Depressive Disorder (Dysthymia)

  • Key classifications within Bipolar and Related Disorders:

    • Bipolar I

    • Bipolar II

    • Cyclothymia

Mood Episodes

Building Blocks of Mood Disorders

  • Three primary mood episodes are identified:

    • Major Depressive Episode

    • Manic Episode

    • Hypomanic Episode

Manic Episode Characteristics

Symptoms of Manic Episodes

  • Essential features include:

    • Elevated or irritable mood

    • Increased goal-directed activity

    • Grandiosity

    • Decreased need for sleep

    • More talkative than usual

    • Racing thoughts

    • Distractibility

    • Increased goal-directed activity or psychomotor agitation

    • Excessive involvement in activities that have a high potential for painful consequences

  • Per the DSM-5, a diagnosis of mania requires at least 4 of the 8 listed symptoms to be present.

Duration of Manic Episodes

  • A manic episode lasts at least 1 week or requires hospitalization.

Hypomanic Episode Characteristics

Differentiate Hypomanic Episodes from Manic Episodes

  • Characteristics include:

    • Same symptoms as mania but less severe

    • Change in functioning that is observable by others

    • Shorter duration than manic episode

    • No clinically-significant impairment, hospitalization, or psychotic features

Bipolar Disorder Criteria

Bipolar I vs. Bipolar II

  • Bipolar I: Characterized by at least one manic episode.

  • Bipolar II: Characterized by:

    • At least one hypomanic episode

    • At least one major depressive episode

    • No history of manic episodes

Cyclothymia

  • Defined by symptoms of hypomania and depressive symptoms over a period of time.

  • Must have no history of depressive, manic, or hypomanic episode that meets full criteria and causes significant distress or impairment.

Statistics and Risk Factors

Bipolar Disorder Statistics

  • Prevalence: Approximately 3.9% lifetime prevalence

  • No significant sex differences observed.

  • Age of onset: Approximately 18 years

  • Preceded by minor mood swings.

  • Chronic condition with a recurrence risk of about 50%.

  • Around 70% of patients experience depressive episodes; 60% may have psychotic symptoms.

  • Elevated risk of suicide by about 15%

Creativity and Bipolar Disorder

Notable Individuals

  • Examples of artists, writers, and public figures believed to have experienced mood disorders include:

    • John Berryman

    • Robert Lowell

    • Anne Sexton

    • Vincent van Gogh

    • Robert Schumann

    • Martin Luther King Jr.

Genetic and Neurobiological Factors

Genetics of Bipolar Disorder

  • High Heritability: Estimated at 60-70%, based on twin studies.

  • Relatives of affected individuals have a heightened risk.

  • Bipolar disorder exhibits a polygenic, complex nature, showing similarities to schizophrenia.

Neurotransmitter Involvements

  • Increased sensitivity to reward during manic episodes linked to:

    • Dysregulation of dopamine

    • Dopamine agonists (e.g., amphetamines/L-Dopa) may trigger manic symptoms.

    • Excessive dopamine release in limbic circuitry related to heightened reward pursuit.

Circadian Rhythm and Bipolar Disorder

Importance of Sleep

  • Sleep patterns are crucial for mood regulation:

    • Sleep gets entrained by external triggers (light) and social rhythms (mealtimes, exercise).

    • Decreased need for sleep is a prodromal sign in over 80% of cases.

    • Disruption of social rhythms can worsen mood states, reinforcing a vicious cycle.

Treatment Approaches

Pharmacotherapy

  • Common treatments include:

    • Polypharmacy: Combination therapies including anti-psychotics, anti-convulsants, lithium, and antidepressants.

    • Lithium is pivotal and should not be used alone without adjunctive therapy.

Psychotherapy

  • Recommended therapeutic modalities include:

    • Family-focused treatment targeting expressed emotion (EE) and medication management.

    • Cognitive Behavioral Therapy (CBT) and Interpersonal and Social Rhythm Therapy (IPSRT).

Key Takeaways about Bipolar Disorder

  • Bipolar disorder is characterized by the occurrence of manic episodes with shared genetic diathesis to schizophrenia and depression.

  • Key features of manic states include heightened reward sensitivity and decreased emotion regulation.

  • Effective treatment includes the use of antipsychotics and anticonvulsants for mania, along with lithium to prevent relapse, complemented by therapy focused on social rhythms and family interventions.