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相关概念视频

Post-traumatic Stress Disorder01:27

Post-traumatic Stress Disorder

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Post-traumatic stress disorder (PTSD) is a psychiatric condition that arises following exposure to traumatic events such as natural disasters, forced displacement, or severe accidents. It significantly impairs individuals' ability to cope with daily activities and disrupts their emotional and psychological equilibrium.
Symptoms and Behavioral Manifestations
A spectrum of distressing symptoms characterizes PTSD. Recurrent flashbacks, where individuals involuntarily relive traumatic events,...
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Olfaction01:25

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The sense of smell is achieved through the activities of the olfactory system. It starts when an airborne odorant enters the nasal cavity and reaches olfactory epithelium (OE). The OE is protected by a thin layer of mucus, which also serves the purpose of dissolving more complex compounds into simpler chemical odorants. The size of the OE and the density of sensory neurons varies among species; in humans, the OE is only about 9-10 cm2.
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Emotionally traumatic events often lead to memories that are exceptionally vivid and enduring, sometimes persisting with remarkable clarity throughout an individual's life. A classic example of this phenomenon is a person who survives a car accident. Even years later, they may recall every detail of the event with startling accuracy — the screeching of the tires, the jarring impact, and the acrid smell of burning rubber. Such vividness contrasts sharply with how an individual...
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Olfactory Receptors: Location and Structure01:03

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The process of olfaction, also known as the sense of smell, is a sophisticated chemical response system. The specialized sensory neurons that facilitate this process, known as olfactory receptor neurons, are situated in an upper segment of the nasal cavity, known as the olfactory epithelium. Olfactory sensory neurons are bipolar, with their dendrites extending from the epithelium's apex into the mucus that lines the nasal cavity. Airborne molecules, when inhaled, traverse the olfactory...
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Physiology of Smell and Olfactory Pathway01:20

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Humans detect odors with the help of specialized cells located in the upper part of the nasal cavity, called olfactory receptor neurons (ORNs). ORNs possess hair-like structures called cilia, which are receptive to sensations from the inhaled air. When an odorant molecule binds to a specific receptor on the cell of the cilia, it leads to a series of events that ultimately cause the ORN to send electrical signals to the olfactory bulb in the brain through the olfactory nerves.
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在PTSD中,气味增强的视觉处理.

Aicko Y Schumann1, Thomas W Uhde2, David C Houghton3

  • 1Institute of Psychiatry, Medical University of South Carolina, 67 President Street, Charleston, 29425, S.C., USA; Department of Mathematics, College of Charleston, 175 Calhoun Street, Charleston, 29401, S.C., USA.

NeuroImage
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PubMed
概括
此摘要是机器生成的。

创伤后应激障碍 (PTSD) 改变了大脑处理感官信息的方式. 这项研究发现,PTSD改变了嗅觉视觉相互作用,影响了战斗退伍军人的威胁感知.

关键词:
连接性的连接性感官感知是一种感官感知.威胁 威胁 威胁创伤是一个创伤.功能磁力共振成像 (fMRI) 是一种

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科学领域:

  • 神经科学是一个神经科学.
  • 感官处理 感官处理
  • 精神病学是一个精神病学.

背景情况:

  • 创伤后应激障碍 (PTSD) 与感官暗示处理的改变有关.
  • 在PTSD中威胁处理中的嗅觉和视觉系统之间的相互作用仍然不清楚.

研究的目的:

  • 为了研究有或没有PTSD的战斗退伍军人中气味增强的视觉处理.
  • 检查在处理中性和与战斗有关的图像期间的嗅觉视觉系统相互作用.

主要方法:

  • 功能磁共振成像 (fMRI) 用于评估大脑激活.
  • 46名战斗退伍军人 (19名患有PTSD,27名健康对照) 参加.
  • 气味增强的视觉处理被测量使用组合的气味图像线索与单独的图片线索.

主要成果:

  • 与健康对照组 (HCV) 相比,患有PTSD (CV+PTSD) 的战斗退伍军人显示出更大的威胁气味增强的视觉皮质激活到中性图像.
  • CV+PTSD对与战斗相关的图像的风味增强视觉皮质激活比HCV的威胁较小.
  • 在CV+PTSD中,功能连接显示了与中性图像的嗅觉视觉合增加,以及与战斗相关图像的合减少.

结论:

  • 结果表明PTSD的感觉处理失调,可能是由于受损的嗅觉视觉合.
  • 创伤后应激障碍可能涉及对潜在威胁的高度关注,取代其他感官信息的处理.
  • 改变的嗅觉视觉相互作用可能会导致创伤后应激障碍的病理生理学.