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関連する概念動画

Synaptic Signaling01:12

Synaptic Signaling

79.8K
Neurons communicate at synapses, or junctions, to excite or inhibit the activity of other neurons or target cells, such as muscles. Synapses may be chemical or electrical.
79.8K
Synaptic Signaling01:09

Synaptic Signaling

6.7K
Neurons communicate at synapses, or junctions, to excite or inhibit the activity of other neurons or target cells, such as muscles. Synapses may be chemical or electrical.
Most synapses are chemical, meaning an electrical impulse or action potential spurs the release of chemical messengers called neurotransmitters. The neuron sending the signal is called the presynaptic neuron, and the neuron receiving the signal is the postsynaptic neuron.
The presynaptic neuron fires an action potential that...
6.7K
Location and Orientation of the Heart01:13

Location and Orientation of the Heart

10.8K
The human heart, despite its modest size and weight, is an organ of remarkable strength and endurance. Roughly the size of a fist, the heart weighs between 250 and 350 grams and is nestled within the mediastinum, the medial cavity of the thorax. It extends obliquely for about 12 to 14 cm, resting on the superior surface of the diaphragm. The heart is positioned anterior to the vertebral column and posterior to the sternum, with two-thirds of its mass lying to the left of the midsternal line.
10.8K
Methods of Documentation I: Source-Oriented Records01:18

Methods of Documentation I: Source-Oriented Records

1.7K
Source-oriented records, or SOR, are medical record-keeping organized by the data source. The SOR system was first developed in the mid-1900s to organize the growing patient data in hospitals and other healthcare facilities.
In an SOR, each discipline involved in patient care maintains a separate medical record section. This record-keeping method enables easy tracking of patient progress and ensures healthcare staff have access to up-to-date information.
Key Attributes include the following:
1.7K
Integration of Synaptic Events01:28

Integration of Synaptic Events

4.2K
Synaptic integration mainly includes the summation of graded potentials. Graded potentials, regardless of their type, cause subtle alterations in membrane voltage, resulting in either depolarization or hyperpolarization. These incremental changes, when combined or summed, can propel the neuron toward its threshold. Consider, for example, a membrane experiencing a +15 mV shift, causing it to depolarize from -70 mV to -55 mV. In this scenario, graded potentials govern the membrane's ability to...
4.2K
Directing Effect of Substituents: meta-Directing Groups01:09

Directing Effect of Substituents: meta-Directing Groups

6.0K
Substituents on the benzene ring that direct an incoming electrophile to undergo substitution at the meta position are called meta directors. All meta directors either have a positive charge on the atom directly bonded to the ring or a partial positive charge. These groups function by withdrawing electrons from the ring through inductive and resonance effects. Consider the carbocation intermediates formed upon the addition of an electrophile on nitrobenzene at the...
6.0K

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Updated: Feb 13, 2026

Studying Synaptic Vesicle Pools using Photoconversion of Styryl Dyes
08:46

Studying Synaptic Vesicle Pools using Photoconversion of Styryl Dyes

Published on: February 15, 2010

12.2K

シナプス裂けは方向性があるのでしょうか?

Dexuan Tang, Zhi-De Deng, Bethanny Danskin

    bioRxiv : the preprint server for biology
    |February 12, 2026
    PubMed
    まとめ
    この要約は機械生成です。

    脳のシナプス裂け目がランダムに指向しているのではなく,方向性バイアスを示しています. この以前は認識されていなかったメソスケールアニソトロピーは,皮質の組織と種間の接続性に影響を及ぼします.

    さらに関連する動画

    Changing the Direction and Orientation of Electric Field During Electric Pulses Application Improves Plasmid Gene Transfer in vitro
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    Changing the Direction and Orientation of Electric Field During Electric Pulses Application Improves Plasmid Gene Transfer in vitro

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    Automated Quantification of Synaptic Fluorescence in C. elegans
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    Automated Quantification of Synaptic Fluorescence in C. elegans

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    Studying Synaptic Vesicle Pools using Photoconversion of Styryl Dyes
    08:46

    Studying Synaptic Vesicle Pools using Photoconversion of Styryl Dyes

    Published on: February 15, 2010

    12.2K
    Changing the Direction and Orientation of Electric Field During Electric Pulses Application Improves Plasmid Gene Transfer in vitro
    04:46

    Changing the Direction and Orientation of Electric Field During Electric Pulses Application Improves Plasmid Gene Transfer in vitro

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    Automated Quantification of Synaptic Fluorescence in C. elegans
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    Automated Quantification of Synaptic Fluorescence in C. elegans

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    科学分野:

    • 神経科学は神経科学である.
    • 計算神経科学とは
    • コネクトコミックス (Connectomics) は,コネクトコミックス (Connectomics) を本棚に登録しているひと

    背景:

    • シナプスは,皮質回路の重要な構成要素である.
    • 彼らの幾何学は伝統的に局所的で同otropic 特性として見られています.
    • ランダムなシナプス裂け目指向の仮定は広く知られています.

    研究 の 目的:

    • シナプス割れ目の空間的方向性を調査する.
    • シナプス幾何学がメソスケールの建築特性を示すかどうかを判断する.
    • イソトロピックシナプス裂け目指向の支配的な仮定をテストするために.

    主な方法:

    • 約1億7千万のシナプス裂け目の分析.
    • 2つの大規模電子顕微鏡データセット (ヒトH01とマウスMICrONS) を利用しました.
    • 皮質層における方向分布の統計分析.

    主要な成果:

    • シナプス割れ目の方向性はランダムではないが,統計的に有意な方向性バイアスを表している.
    • これらのバイアスは,皮質層全体で空間的に一貫しています.
    • メソスケールアニソトロピーは種 (人間とマウス) において保存されているが,人間の関連皮質ではより強い.

    結論:

    • シナプス幾何学はメソスケールアニソトロピーを有し,同otropic仮定に異議を唱える.
    • このアニソトロピーは,皮質のマイクロアーキテクチャの認識されていない次元を表しています.
    • シナプス幾何学は,回路の組織,メソスケール接続,および電気場との神経相互作用に影響を与える可能性が高い.