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Psychosis and Antipsychotic Drugs: Overview01:28

Psychosis and Antipsychotic Drugs: Overview

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

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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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Antipsychotic drugs are a crucial treatment method for acute and chronic psychoses, bipolar illness, and behavioral disorders. The selection of these drugs depends on several factors, including the state of the disease, clinical judgment, possible drug interactions, and the patient's sensitivity to adverse effects. In immediate scenarios, such as delirium and dementia, short-term treatment with low doses of high-potency typical or atypical agents can effectively manage symptom exacerbation.
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Panic Disorder01:27

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Panic disorder is an anxiety disorder characterized by recurrent and sudden minutes-long episodes of intense fear, known as panic attacks. These attacks may feel like heart attacks and often happen without warning or a specific cause. They can include symptoms such as rapid heart rate, shortness of breath, chest pain, trembling, sweating, dizziness, and a sense of helplessness. During a panic attack, individuals may feel as though they are experiencing a heart attack or are in a...
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Schizophrenia01:17

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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...
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Psychological and Sociocultural Causes of Schizophrenia01:29

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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...
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Handwriting Analysis Indicates Spontaneous Dyskinesias in Neuroleptic Naïve Adolescents at High Risk for Psychosis
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视觉P300和精神病发病的风险在临床高风险的年轻人.

Holly K Hamilton1, Brian J Roach2, Spero Nicholas2

  • 1Department of Psychiatry & Behavioral Sciences, University of Minnesota, Minneapolis, MN; Minneapolis VA Health Care System, Minneapolis, MN; Department of Psychiatry & Behavioral Sciences, University of California, San Francisco, CA.

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概括

视觉P300事件相关潜力 (ERP) 缺陷与风险人群中精神病发作有关. 降低P3b振幅预测更早的转化,显示为精神病发展的生物标志物的潜力.

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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.
  • 生物标志物 生物标志物

背景情况:

  • 对于预测精神病发作的临床标准是不够的.
  • 生物标志物是必要的,以改善临床高危精神病 (CHR) 个体的结果预测.
  • 视觉P300事件相关潜力 (ERP) 幅度,已知在精神分裂症下降,在CHR个体中进行了研究.

研究的目的:

  • 在CHR个体中检查视觉P300 ERP振幅.
  • 为了确定P300振幅是否与未来的精神病发作有关.
  • 为了确定精神病发展的潜在生物标志物.

主要方法:

  • 脑电图 (EEG) 记录了538名CHR个体和230名健康比较 (HC) 参与者使用视觉奇怪任务.
  • 测量了P3b (目标刺激) 和P3a (新刺激) 的幅度.
  • 对CHR参与者进行了24个月的跟踪,以比较转换器 (n=71) 和非转换器 (n=218).

主要成果:

  • 与HC相比,CHR个体的P300幅度减少了.
  • 未来的CHR转换器显示出比非转换器和HC更大的P3b缺陷.
  • 降低目标P3b振幅预测了更早的精神病转化,即使在根据症状严重程度进行调整后也是如此.

结论:

  • 视觉目标P3b缺陷与风险人群中精神病转化有关.
  • 这些缺陷与迫在眉的精神病转化相关.
  • 视觉P3b振幅显示为预测精神病发作的生物标志物具有前途.