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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.
Psychosis: Pathophysiology of Schizophrenia and Other Psychotic Disorders01:27

Psychosis: Pathophysiology of Schizophrenia and Other Psychotic Disorders

Schizophrenia is a neurodevelopmental disorder whose origins are rooted in complex genetic components. Despite our burgeoning understanding, the pathophysiology of this disorder remains incompletely deciphered.
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Schizophrenia

Schizophrenia, a term introduced by Swiss psychiatrist Eugen Bleuler in 1911, describes a severe psychological disorder marked by profound disruptions in attention, thought processes, language, emotion, and interpersonal relationships. The core feature of schizophrenia is psychosis — a state characterized by a fundamental detachment from reality. This disconnection manifests through distorted logic, impaired perception, and atypical behavior, severely affecting the lives of those diagnosed.
Psychosis and Antipsychotic Drugs: Overview01:28

Psychosis and Antipsychotic Drugs: Overview

The term "psychosis" refers to a spectrum of mental disorders characterized by abnormal thoughts, perceptions, and behaviors. It can manifest as mood disorders, dementia, delirium with psychotic features, substance-induced psychosis with psychotic features, brief psychotic disorder, delusional disorder, schizoaffective disorder, and schizophrenia. Among all these disorders, schizophrenia is the most common psychotic disorder, affecting 1% of the worldwide population. Psychotic symptoms in all...
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Negative and Cognitive Symptoms of Schizophrenia

Negative symptoms of schizophrenia indicate a reduction or absence of typical behaviors and emotional responses found in healthy individuals, while positive symptoms reflect an excess or distortion of normal functioning.
Negative Symptoms
Negative symptoms of schizophrenia manifest as deficits in normal emotional and behavioral functioning, profoundly impacting daily life. Individuals with schizophrenia often display a flat affect, characterized by a near-total absence of emotional expression,...
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Methods to Explore the Influence of Top-down Visual Processes on Motor Behavior
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Visual context processing in bipolar disorder: a comparison with schizophrenia.

Eunice Yang1, Duje Tadin, Davis M Glasser

  • 1Department of Psychology, Vanderbilt University, Nashville TN, USA ; School of Optometry, University of California Berkeley, Berkeley CA, USA.

Frontiers in Psychology
|September 7, 2013
PubMed
Summary
This summary is machine-generated.

Visual context processing differs between bipolar disorder and schizophrenia. Bipolar disorder patients showed normal visual context effects, unlike schizophrenia patients who had specific deficits, particularly in contrast perception.

Keywords:
bipolar disordercontextual effectsperception deficitschizophreniavisual processing

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Area of Science:

  • Neuroscience
  • Psychiatry
  • Visual Perception

Background:

  • Anomalous perception is studied in schizophrenia, but its specificity to psychotic disorders is unclear.
  • Visual context processing abnormalities in schizophrenia suggest task-specific deficits.

Purpose of the Study:

  • To investigate visual contextual processing in bipolar disorder.
  • Compare visual context processing in bipolar disorder, schizophrenia, and healthy individuals.

Main Methods:

  • Quantified contextual effects on brightness, size, contrast, orientation, and motion perception.
  • Compared performance across patient groups and healthy controls on visual tasks.

Main Results:

  • Bipolar disorder patients exhibited normal visual contextual effects across all tasks.
  • Schizophrenia patients showed weakened contrast modulation but intact luminance and size effects.
  • Clinical state, particularly manic symptoms, influenced contrast modulation in bipolar disorder.

Conclusions:

  • Visual context processing deficits are not universal across psychotic disorders.
  • Contrast gain control may be modulated by clinical state in bipolar disorder.
  • Motion and orientation context effects correlate with symptom severity in both disorders.