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Related Concept Videos

Bipolar Disorder01:30

Bipolar Disorder

420
Bipolar disorder is a chronic mental health condition marked by significant mood fluctuations, including episodes of mania and depression. Elevated energy levels, heightened mood or irritability, impulsive behavior, reduced sleep needs, rapid speech, racing thoughts, inflated self-esteem, and distractibility characterize mania. Individuals with bipolar disorder often alternate between depressive and manic states, with periods of emotional stability lasting an average of six months to a year.
420
Mania and Antimanic Drugs: Overview01:24

Mania and Antimanic Drugs: Overview

434
Mania, a psychological condition characterized by elevated mood, increased energy, and reduced sleep need, is part of the bipolar disorder cycle. The exact cause of mania isn't entirely known, but it is thought to be a combination of genetic, environmental, and neurological factors. Bipolar disorder involves alternating manic and depressive episodes. Mood stabilizers like lithium, antipsychotics, and anticonvulsants help manage these episodes. Lithium carbonate is particularly effective as...
434
Borderline Personality Disorder01:25

Borderline Personality Disorder

321
Borderline Personality Disorder is a complex and multifaceted mental health condition characterized by pervasive instability in interpersonal relationships, self-image, emotions, and impulse control. This instability manifests in extreme emotional reactions, fear of abandonment, and self-destructive behaviors. The disorder significantly impacts daily functioning, often leading to distress in both personal and professional domains.
Genetic and Environmental Contributions
Borderline Personality...
321
Personality Disorders: Paranoid and Schizoid01:22

Personality Disorders: Paranoid and Schizoid

325
Personality disorders represent enduring cognition, affect, and behavior patterns that significantly deviate from societal norms. These maladaptive traits often lead to difficulties in various domains, including interpersonal relationships, occupational settings, and overall psychological well-being. Paranoid personality disorder and schizoid personality disorder are two distinct conditions marked by odd or eccentric behavior.
Paranoid Personality Disorder
Paranoid personality disorder is...
325
Personality Disorders: Schizotypal and Histrionic01:20

Personality Disorders: Schizotypal and Histrionic

274
Schizotypal personality disorder and histrionic personality disorder are two distinct psychological conditions classified under personality disorders, each characterized by unique behavioral patterns and social difficulties. Both disorders significantly affect interpersonal relationships and emotional well-being, leading to social isolation and frustration.
Schizotypal Personality Disorder: Eccentric Behavior and Social Withdrawal
Schizotypal personality disorder is marked by odd or eccentric...
274
Depressive Disorders: MDD and Dysthymia01:27

Depressive Disorders: MDD and Dysthymia

356
Depressive disorders are a group of mental health conditions characterized by pervasive feelings of sadness, diminished pleasure in life, and a significant impact on daily functioning. These conditions are most prevalent in individuals during their 30s and affect women at twice the rate of men. Contrary to popular belief, younger individuals are generally more susceptible to these disorders than older adults. Two key types of depressive disorders include Major Depressive Disorder (MDD) and...
356

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Related Experiment Video

Updated: Nov 27, 2025

Developing a Rat Model for Bipolar Disorder
04:42

Developing a Rat Model for Bipolar Disorder

Published on: May 2, 2025

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Bipolar disorders.

Roger S McIntyre1, Michael Berk2, Elisa Brietzke3

  • 1Mood Disorders Psychopharmacology Unit, University Health Network, Toronto, ON, Canada; Department of Psychiatry, University of Toronto, Toronto, ON, Canada; Department of Pharmacology, University of Toronto, Toronto, ON, Canada; Brain and Cognition Discovery Foundation, Toronto, ON, Canada.

Lancet (London, England)
|December 6, 2020
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Summary

Bipolar disorders are chronic conditions significantly impacting life expectancy and functioning. While genetics play a role, environmental factors and comorbidities are crucial for understanding and treating bipolar disorder.

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Area of Science:

  • Psychiatry and Behavioral Sciences
  • Genetics and Genomics
  • Neuroscience

Background:

  • Bipolar disorders (BPI, BPII) are severe, chronic mental health conditions reducing psychosocial functioning and life expectancy.
  • High heritability (70%) links bipolar disorder to other mental and medical conditions, with distinct genetic associations for BPI (schizophrenia) and BPII (major depressive disorder).
  • Pathogenesis involves neuronal-glial plasticity, monoaminergic signaling, inflammation, cellular metabolism, and mitochondrial dysfunction, influenced by childhood maltreatment.

Purpose of the Study:

  • To provide primary care physicians with an overview of diagnostic, pathogenetic, and treatment considerations for bipolar disorders.
  • To synthesize current evidence on the epidemiology, mechanisms, screening, and treatment of bipolar disorders.
  • To highlight the importance of addressing comorbidities and psychosocial factors in managing bipolar disorder.

Main Methods:

  • Review and synthesis of existing evidence on bipolar disorders.
  • Analysis of genetic associations, pathogenetic pathways, and environmental influences.
  • Evaluation of current pharmacological and psychosocial treatment strategies.

Main Results:

  • Depressive episodes significantly contribute to morbidity and mortality in bipolar disorders, despite mania defining BPI.
  • Lithium remains a gold standard mood stabilizer; antipsychotics are effective for mania but not consistently for bipolar depression.
  • Antidepressant use in bipolar disorder lacks strong efficacy evidence and may cause mood destabilization; access to effective treatments is limited globally.

Conclusions:

  • Effective management of bipolar disorders requires addressing medical and psychiatric comorbidities, integrating psychosocial treatments, and involving caregivers.
  • Primary care physicians play a vital role in screening, diagnosis, and management of bipolar disorders.
  • Further research is needed to improve treatment accessibility and efficacy, particularly for bipolar depression.