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関連する概念動画

Classification of Skeletal Muscle Fibers01:48

Classification of Skeletal Muscle Fibers

59.4K
Skeletal muscles continuously produce ATP to provide the energy that enables muscle contractions. Skeletal muscle fibers can be categorized into three types based on differences in their contraction speed and how they produce ATP, as well as physical differences related to these factors. Most human muscles contain all three muscle fiber types, albeit in varying proportions.
Slow-Twitch Muscle Fibers
Slow oxidative, muscle fibers appear red due to large numbers of capillaries and high levels of...
59.4K
Types of Skeletal Muscle Fibers01:32

Types of Skeletal Muscle Fibers

4.1K
Skeletal muscles comprise various fibers, each with distinct characteristics and roles in movement and stability. They are mainly categorized into three types — fast-twitch, slow-twitch, and intermediate.
Fast-twitch fibers
Fast-twitch fibers, or Type II fibers, are designed for quick, powerful bursts of speed and strength. They reach peak tension within approximately 0.01 seconds following stimulation. Characterized by a large diameter and densely packed myofibrils, these fibers contain...
4.1K
Formation of Muscle Fibers from Myoblasts01:13

Formation of Muscle Fibers from Myoblasts

5.8K
De novo myogenesis, or the formation of muscle fibers, begins during the early embryonic stages. The skeletal muscle is formed from somites– blocks of embryonic cell layers. The somites are further divided into dermatomes, myotomes, sclerotomes, and syndetomes. Among these, the myotomes give rise to muscle fibers.
Muscle progenitor cells (MPCs) are formed from the myotomes. MPCs express genes that encode the transcription factors Pax3 and Pax7. Along with Pax 3/7, other transcription...
5.8K
Thermal Strain01:19

Thermal Strain

2.8K
Thermal strain is a concept that arises when we consider how temperature changes affect structures. Unlike the conventional assumption that structures remain constant under load, real-world scenarios often involve temperature fluctuations that can significantly impact these structures. Consider a homogeneous rod with a uniform cross-section resting freely on a flat horizontal surface. If the rod's temperature increases, the rod elongates. This elongation is proportional to the temperature...
2.8K
Shearing Strain01:20

Shearing Strain

1.3K
The shearing strain represents a cubic element's angular change when subjected to shearing stress. This type of stress can transform a cube into an oblique parallelepiped without influencing normal strains. The cubic element experiences a significant transformation when exposed solely to shearing stress. Its shape alters from a perfect cube into a rhomboid, clearly demonstrating the effect of shearing strain. The degree of this strain is considered positive if it reduces the angle between the...
1.3K
Measurements of Strain01:27

Measurements of Strain

2.5K
Strain quantifies the deformation of a material under force, typically measured as normal strain, which represents the change in length when compared with the original length. Electrical strain gauges are used for enhanced accuracy. These devices consist of a conductive wire mounted on a paper backing that adheres to the material's surface. These gauges operate on the piezoresistive effect, where the wire's electrical resistance changes in response to mechanical deformation. The strain...
2.5K

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Updated: Jan 22, 2026

High-Throughput Contractile Measurements of Hydrogel-Embedded Intact Mouse Muscle Fibers Using an Optics-Based System
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High-Throughput Contractile Measurements of Hydrogel-Embedded Intact Mouse Muscle Fibers Using an Optics-Based System

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ストレインプログラム可能な繊維ベースの人工筋肉

Mehmet Kanik1,2, Sirma Orguc3, Georgios Varnavides1,2,4

  • 1Research Laboratory of Electronics, Massachusetts Institute of Technology (MIT), Cambridge, MA 02139, USA.

Science (New York, N.Y.)
|July 13, 2019
PubMed
まとめ
この要約は機械生成です。

研究者達は新しい繊維描画技術を使って 拡張可能な人工筋肉を開発しました この強力なプログラム可能なアクチュエータは ロボット工学や バイオメディカルアプリケーションの 調整可能な寸法と高度なフィードバックを提供します

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Artificial Lung Device Priming for In Situ Fiber Bundle Surface Grafting

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Author Spotlight: Deciphering the Mysteries of Skeletal Muscle Fiber Types Using the MyDoBID Technique
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Author Spotlight: Deciphering the Mysteries of Skeletal Muscle Fiber Types Using the MyDoBID Technique

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関連する実験動画

Last Updated: Jan 22, 2026

High-Throughput Contractile Measurements of Hydrogel-Embedded Intact Mouse Muscle Fibers Using an Optics-Based System
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High-Throughput Contractile Measurements of Hydrogel-Embedded Intact Mouse Muscle Fibers Using an Optics-Based System

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Author Spotlight: Deciphering the Mysteries of Skeletal Muscle Fiber Types Using the MyDoBID Technique
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Author Spotlight: Deciphering the Mysteries of Skeletal Muscle Fiber Types Using the MyDoBID Technique

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科学分野:

  • 材料科学
  • ロボット工学
  • バイオメディカルエンジニアリング

背景:

  • ポリマーベースのアクチュエータは ロボット工学,ハプティック工学,義肢工学に不可欠です
  • 現在の課題は 拡張可能な生産と 人工筋肉の調整可能な寸法です

研究 の 目的:

  • 調整可能な寸法を持つ人工筋肉を生産するためのスケーラブルな方法を開発する.
  • 強化された制御とフィードバック機能を持つ高性能なファイバーベースのアクチュエータを作成します.

主な方法:

  • ハイ・スループット・イテラティブ・ファイバー・ドローイング・テクニックを使用した.
  • 3つの大きさのオーダーを超えた 拡張プログラム可能な人工筋肉を製造した
  • 導電性ナノワイヤメッシュを統合し,圧縮抵抗性ストレスのフィードバックをします.

主要な成果:

  • 熱と光学的に制御可能なファイバーベースのアクチュエータを達成しました.
  • 自重の650倍以上を 持ち上げられるアクチュエータ
  • 1000%以上の負荷と10^5回以上の変形サイクルに耐えるアクチュエータ.
  • 統合されたナノワイヤメッシュは,信頼性の高いストレスのフィードバックと長期的な回復力を提供しました.

結論:

  • 拡張可能な繊維抽出技術は,調整可能な寸法を持つ人工筋肉の生産を可能にします.
  • この人工筋肉は 特殊な強さや ストレス耐性や 反応力を発揮します
  • この技術はロボット工学,ハプティック工学,義肢工学,バイオメディカルアプリケーションの 進歩に大きく貢献します