相关实验视频
Updated: Jun 20, 2025

07:14
A Method to Study Adaptation to Left-Right Reversed Audition
Published on: October 29, 2018
6.5K
在精神分裂症患者有听觉幻觉的重复依赖的适应和预测错误信号:一个漫游不匹配的消极性研究
Anushree Bose1, Swarna Buddha Nayok2, Harsh Pathak1
1WISER Neuromodulation Program, Department of Psychiatry, National Institute of Mental Health and Neurosciences, Bangalore, India.
Asian journal of psychiatry
|July 20, 2024
概括
精神分裂症的听觉幻觉 (SZ-AH) 与预测错误信号的中断有关. 精神分裂症患者的偏差检测受损,表明听觉处理发生了变化,短期可塑性没有保持.
科学领域:
- 神经科学是一个神经科学.
- 精神病学是一个精神病学.
- 听觉感知是一种听觉感知.
背景情况:
- 失调的预测错误信号与精神分裂症 (SZ-AH) 的听觉幻觉 (AH) 有关.
- 漫游不匹配负面性 (rMMN) 用事件相关潜力 (ERP) 测量感官适应和偏差检测.
- 重复阳性 (RP) 反映了感官适应,而偏差负性 (DN) 表示偏差检测;它们的差异 (MMN) 量化了预测错误信号.
研究的目的:
- 用rMMN范式研究精神分裂症听觉幻觉的神经机制.
- 为了比较SZ-AH和健康对照 (HC) 个体之间的感官适应和偏差检测.
- 探索rMMN组件与SZ-AH中的临床变量之间的关系.
主要方法:
- 23名SZ-AH患者和23名HC患者接受了rMMN评估,并进行了不同的标准刺激重复 (3, 8, 33).
- 组之间对RP,DN和MMN组件的幅度和延迟进行了比较.
- 分析了rMMN测量与临床变量之间的相关性,以及RP-DN幅度关系.
主要成果:
- 与HC相比,SZ-AH患者表现出明显抑制的DN和MMN33幅度.
- 在SZ-AH患者中,MMN33的延迟时间显著更长.
- 虽然HC显示RP-DN对之间的正相关性,但SZ-AH显示了相反的模式,表明预测错误信号的改变.
结论:
- 这项研究揭示了SZ-AH中感官适应和偏差检测之间的联系的扰乱.
- 在SZ-AH中不受损害的RP并不意味着保留了短期的可塑性,但可能是听觉处理干扰的结果.
- 研究结果表明,预测错误信号的改变有助于精神分裂症患者的听觉幻觉.
相关概念视频
Positive Symptoms Schizophrenia: Hallucinations and Delusions
53
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...
Hallucinations
Hallucinations in...
53
Psychological and Sociocultural Causes of Schizophrenia
82
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...
82
Positive Symptoms of Schizophrenia: Hallucinations and Delusions
73
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...
Thought Disorders
Disorganized and unusual thought processes mark thought disorders in schizophrenia. One key feature is disorganized speech, where an individual's conversation includes...
73
Psychosis: Pathophysiology of Schizophrenia and Other Psychotic Disorders
553
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...
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...
553
Negative and Cognitive Symptoms of Schizophrenia
48
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,...
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,...
48

