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Related Concept Videos

Negative and Cognitive Symptoms of Schizophrenia01:30

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,...
Schizophrenia01:17

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.
Positive Symptoms of Schizophrenia: Hallucinations and Delusions01:30

Positive Symptoms of Schizophrenia: Hallucinations and Delusions

Schizophrenia is a complex mental health disorder that can manifest with various positive symptoms, including thought, movement, and behavior disorders. These symptoms significantly disrupt cognitive and motor functions, leading to profound effects on an individual's ability to engage with the world.
Thought Disorders
Disorganized and unusual thought processes mark thought disorders in schizophrenia. One key feature is disorganized speech, where an individual's conversation includes loosely...
Psychological and Sociocultural Causes of Schizophrenia01:29

Psychological and Sociocultural Causes of Schizophrenia

Schizophrenia, a complex psychiatric disorder, has been historically misunderstood. Early psychological theories attributed its origins to childhood trauma and unresponsive parenting. However, contemporary research largely rejects these notions, favoring the vulnerability-stress hypothesis. This model proposes that individuals with a genetic predisposition to schizophrenia may develop the disorder following exposure to significant environmental stressors. Notably, studies on high-risk...
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.
Researchers have identified genetic factors that increase susceptibility to schizophrenia, underscoring the intricate interplay between genetics and environment in disease development. At the core of schizophrenia's pathophysiology is excessive dopaminergic neurotransmission within the...
Positive Symptoms Schizophrenia: Hallucinations and Delusions01:26

Positive Symptoms Schizophrenia: Hallucinations and Delusions

Schizophrenia is a complex psychiatric disorder characterized by a range of symptoms that significantly impact cognition, behavior, and emotional regulation. Among these, the positive symptoms stand out as they involve the addition or exaggeration of normal mental functions, deviating markedly from typical behavior and perception. Hallucinations and delusions are prominent positive symptoms, each profoundly affecting the individual's experience of reality.
Hallucinations
Hallucinations in...

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Related Experiment Video

Updated: Jun 17, 2026

Standardized Data Acquisition for Neuromelanin-Sensitive Magnetic Resonance Imaging of the Substantia Nigra
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Standardized Data Acquisition for Neuromelanin-Sensitive Magnetic Resonance Imaging of the Substantia Nigra

Published on: September 8, 2021

Iconic decay in schizophrenia.

Britta Hahn1, Emily S Kappenman, Benjamin M Robinson

  • 1Maryland Psychiatric Research Center, University of Maryland School of Medicine, P.O. Box 21247, Baltimore, MD 21228, USA. bhahn@mprc.umaryland.edu

Schizophrenia Bulletin
|January 8, 2010
PubMed
Summary
This summary is machine-generated.

Schizophrenia patients show working memory deficits, but this study found no evidence of faster iconic memory decay. Iconic decay is not a source of working memory impairment in schizophrenia.

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Published on: November 21, 2013

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Last Updated: Jun 17, 2026

Standardized Data Acquisition for Neuromelanin-Sensitive Magnetic Resonance Imaging of the Substantia Nigra
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Handwriting Analysis Indicates Spontaneous Dyskinesias in Neuroleptic Naïve Adolescents at High Risk for Psychosis
05:52

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Published on: November 21, 2013

Area of Science:

  • Cognitive Neuroscience
  • Psychiatry

Background:

  • Working memory impairment is a core deficit in schizophrenia.
  • Evidence suggests deficits may occur during information encoding.
  • Iconic memory, a sensory store, may be affected by rapid decay.

Purpose of the Study:

  • To investigate if faster iconic memory decay contributes to working memory deficits in schizophrenia.
  • To compare iconic memory decay rates between patients with schizophrenia and healthy controls.

Main Methods:

  • A partial report procedure was used with 37 schizophrenia patients and 28 healthy controls.
  • Participants viewed six letters for 50 ms, followed by a variable delay (0-1000 ms) and a cue.
  • Recall accuracy was measured based on the cue delay to assess iconic memory decay.

Main Results:

  • Both groups showed decreased recall accuracy with increased cue delay, indicating decay.
  • Schizophrenia patients exhibited impaired memory performance across all delays.
  • No significant difference in the rate of iconic memory decay was found between patients and controls.

Conclusions:

  • Faster iconic memory decay does not underlie working memory impairments in schizophrenia.
  • This finding rules out iconic decay as a source of working memory deficits in this population.
  • Iconic decay rate is not impaired in individuals with schizophrenia.