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Related Concept Videos

Bipolar Disorder01:30

Bipolar Disorder

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.
Mania and Antimanic Drugs: Overview01:24

Mania and Antimanic Drugs: Overview

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 a...
Introduction to Biological Bases of Psychology01:30

Introduction to Biological Bases of Psychology

Biopsychology serves as a vital bridge connecting the intricate domains of biology and psychology, shedding light on how biological systems influence psychological phenomena. This field scrutinizes the biological substrates of behavior and mental processes, emphasizing the nervous system along with the roles of neurotransmitters, hormones, and genetics. It also incorporates evolutionary perspectives to explain the adaptive nature of mental functions.
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Borderline Personality Disorder01:25

Borderline Personality Disorder

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.
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Behavior Modification01:21

Behavior Modification

Behavioral approaches have often been criticized for ignoring mental processes and focusing solely on observable behavior. However, these approaches provide an optimistic perspective for individuals seeking to change their behaviors. Rather than concentrating on intrinsic personality traits, behavioral approaches suggest that even longstanding habits can be modified by changing the reward contingencies that maintain them.
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Autism Spectrum Disorder01:19

Autism Spectrum Disorder

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Related Experiment Video

Updated: May 10, 2026

Developing a Rat Model for Bipolar Disorder
04:42

Developing a Rat Model for Bipolar Disorder

Published on: May 2, 2025

Behavioral Activation System (BAS) differences in bipolar I and II disorder.

Kathryn Fletcher1, Gordon Parker, Vijaya Manicavasagar

  • 1School of Psychiatry, University of New South Wales, NSW, Australia. k.fletcher@unsw.edu.au

Journal of Affective Disorders
|July 2, 2013
PubMed
Summary

Behavioral Activation System (BAS) sensitivity differs between bipolar I and II disorders, impacting mood variability. These findings suggest distinct treatment approaches may be needed for each bipolar subtype.

Keywords:
Behavioral Activation SystemBipolar disorderBipolar sub-types

Related Experiment Videos

Last Updated: May 10, 2026

Developing a Rat Model for Bipolar Disorder
04:42

Developing a Rat Model for Bipolar Disorder

Published on: May 2, 2025

Area of Science:

  • Psychiatry
  • Neuroscience
  • Clinical Psychology

Background:

  • The Behavioral Activation System (BAS) dysregulation model is increasingly supported for bipolar disorder.
  • Its specific relevance to bipolar II disorder requires further examination.
  • This study investigates BAS sensitivity in bipolar I and II disorders.

Purpose of the Study:

  • To determine if bipolar subtypes (I vs. II) exhibit differences in BAS sensitivity.
  • To examine prospective relationships between BAS sensitivity and symptom expression in bipolar I and II disorder.
  • To assess the potential for tailored treatments based on subtype-specific BAS characteristics.

Main Methods:

  • 151 participants with bipolar disorder (69 I, 82 II) were recruited from the Black Dog Institute.
  • Diagnoses were confirmed via structured interviews and clinician agreement.
  • Baseline BAS sensitivity, mood, and anxiety were measured; mood was tracked over 6 months, with clinician-rated mood status reassessed for predictive utility.

Main Results:

  • Bipolar I participants showed significantly higher BAS-Drive and Reward Responsiveness scores than bipolar II.
  • BAS sub-scale scores were positively associated with mood variability in both bipolar I and II disorder.
  • BAS-Drive and Reward Responsiveness correlated with bipolar I hypomania, and BAS-Drive with bipolar II depression, but BAS scores did not predict future mood episode status.

Conclusions:

  • Quantifiable differences in BAS sensitivity and its association with mood variability exist between bipolar I and II disorder.
  • These findings underscore the need for subtype-specific treatment strategies for bipolar disorder.
  • Further research into the role of the BAS in differentiating bipolar subtypes is warranted.