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相关概念视频

Cranial Bones: Lateral View01:27

Cranial Bones: Lateral View

The lateral view of the cranium is dominated by temporal, sphenoid, and ethmoid bones.
The temporal bone forms the lower lateral side of the skull. The temporal bone is subdivided into several regions. The flattened upper portion is the squamous portion of the temporal bone. Below this area and projecting anteriorly is the zygomatic process of the temporal bone, which forms the posterior portion of the zygomatic arch. Posteriorly is the mastoid portion of the temporal bone. Projecting...
Cranial Nerves: Overview and Anatomy01:19

Cranial Nerves: Overview and Anatomy

The cranial nerves are an important part of the complex network of nerves in the human body. These nerves emerge directly from the brain and are responsible for transmitting essential information between the brain and various parts of the head and neck. There are 12 pairs of cranial nerves, systematically numbered using Roman numerals from I to XII, beginning from the anterior and moving to the posterior of the brain. Each cranial nerve is uniquely identified by names that reflect its function...
Cranial Nerves: Types Part I01:14

Cranial Nerves: Types Part I

Cranial nerves are responsible for transmitting motor and sensory information between the brain and various parts of the body. There are twelve pairs of cranial nerves, with the first six being essential in sensory perception, motor control, and autonomic functions related to the head and neck.
Olfactory Nerve (Cranial Nerve I)
The olfactory nerve, or cranial nerve I, is unique as it is purely sensory and dedicated to the sense of smell. This nerve originates in the olfactory epithelium of the...
Cranial Part of Parasympathetic Division01:18

Cranial Part of Parasympathetic Division

The cranial part of the parasympathetic division plays a crucial role in regulating the visceral functions of the head and specific structures in the neck, thoracic, and abdominopelvic cavities. Preganglionic fibers of the parasympathetic division exit the brain through cranial nerves III (oculomotor), VII (facial), IX (glossopharyngeal), and X (vagus), delivering parasympathetic output to the respective visceral structures.
The vagus nerve (cranial nerve X) alone accounts for approximately 75...
Olfactory Receptors: Location and Structure01:03

Olfactory Receptors: Location and Structure

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...
Tooth Anatomy01:21

Tooth Anatomy

The human tooth enables us to eat a variety of foods, speak clearly, and even aid in shaping our faces. Teeth are composed of various elements that work together. Here's a detailed look at the anatomy of a human tooth.
The Crown, Neck, and Root
The visible part of the tooth is referred to as the crown. It's covered by enamel, the hardest substance in the human body. The crown is uniquely shaped for each type of tooth, allowing for different functions such as cutting, tearing, or grinding food.

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相关实验视频

Updated: Jun 21, 2026

Ex Vivo Preparations of the Intact Vomeronasal Organ and Accessory Olfactory Bulb
08:59

Ex Vivo Preparations of the Intact Vomeronasal Organ and Accessory Olfactory Bulb

Published on: August 5, 2014

快速陷下巴和巨大的神经元在的odontomachus.

W Gronenberg, J Tautz, B Hölldobler

    Science (New York, N.Y.)
    |October 22, 1993
    PubMed
    概括

    像Odontomachus这样的陷甲拥有作为机械受体的触发毛,使它们的能够在毫秒内快速关闭,以捕捉快速的猎物. 这种快速反应是由异常大的感觉神经元促进的.

    科学领域:

    • 动物学 动物学
    • 生物物理学的生物物理.
    • 神经伦理学 神经伦理学

    背景情况:

    • 波特林属Odontomachus表现出一种独特的掠夺行为,涉及快速陷机制.
    • 这种机制对于捕捉快速移动的猎物至关重要.
    • 了解这种快速反应的感官基础是理解昆虫掠食性适应的关键.

    研究的目的:

    • 为了研究Odontomachus下上的触发毛的功能.
    • 为了确定极快的陷关闭的神经基础.
    • 描述参与猎物检测的感觉神经元.

    主要方法:

    • 用电生理学记录来评估触发毛的功能.
    • 进行了显微镜检查,以测量相关的感觉轴突的直径.
    • 捕捉猎物的行为观察与神经反应相关.

    主要成果:

    • 部上的触发毛发作为机械受体,在与猎物接触时启动陷反应.
    • 陷关闭发生在0.33到1毫秒的极短时间内.
    • 相关的感觉神经元具有直径大 (15-20微米) 的轴突,表明信号传导速度快.

    结论:

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    Ex Vivo Preparations of the Intact Vomeronasal Organ and Accessory Olfactory Bulb
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    Ex Vivo Preparations of the Intact Vomeronasal Organ and Accessory Olfactory Bulb

    Published on: August 5, 2014

    A Minimally Invasive Lesion Technique for Muscles Intrinsic to the Odontophore of Aplysia californica
    05:38

    A Minimally Invasive Lesion Technique for Muscles Intrinsic to the Odontophore of Aplysia californica

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    The Establishment of a Murine Mandibular Molar Extraction Socket Healing Model

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    • 与触发毛相关的大型感觉轴突促进了快速的信息传输,使得Odontomachus的毫秒级陷大反应成为可能.
    • 这种专门的机械传感系统是有效捕食快速猎物的关键适应.
    • 这些发现突出了神经元大小和传导速度在快速生物反应的背景下之间的联系.