Jove
Visualize
お問い合わせ
JoVE
x logofacebook logolinkedin logoyoutube logo
JoVEについて
概要リーダーシップブログJoVEヘルプセンター
著者向け
出版プロセス編集委員会範囲と方針査読よくある質問投稿
図書館員向け
推薦の声購読アクセスリソース図書館諮問委員会よくある質問
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experimentsアーカイブ
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教員リソースセンター教員サイト
利用規約
プライバシーポリシー
ポリシー

関連する概念動画

Criticisms of the Evolutionary Perspective01:23

Criticisms of the Evolutionary Perspective

345
In a study where individuals posing as strangers offered compliments and proposed casual sex to students, the responses differed significantly based on gender. Not a single woman accepted the proposal, while 70% of the men agreed. This outcome provides a useful scenario to explore through the lens of evolutionary psychology and social learning theory, highlighting the diverse perspectives on human sexual behaviors.
Evolutionary psychology provides one explanation for these findings, suggesting...
345
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
Relaxation of Skeletal Muscles01:29

Relaxation of Skeletal Muscles

5.6K
The period of muscle contraction primarily influences the duration of stimulation at the neuromuscular junction (NMJ), the presence of free calcium ions in the sarcoplasm, and the availability of energy or ATP to support contractions.
When an action potential reaches the axon terminal, it depolarizes the membrane and opens voltage-gated sodium channels. Sodium ions enter the cell, further depolarizing the presynaptic membrane. This depolarization causes voltage-gated calcium channels to open....
5.6K
Overview of Skeletal Muscle01:15

Overview of Skeletal Muscle

14.3K
Skeletal muscles are composed of a bundle of muscle fibers and are attached to bones through tendons. Each skeletal muscle fiber is a single muscle cell. The sarcolemma, the plasma membrane of a skeletal muscle cell, consists of a lipid bilayer and glycocalyx that supports muscle fibers. The sarcolemma extends into the muscle cells to form tubular structures called transverse or T-tubules. Each side of the T-tubules consists of a membrane-bound structure called the sarcoplasmic reticulum,...
14.3K
Skeletal Muscle Anatomy00:55

Skeletal Muscle Anatomy

92.7K
Skeletal muscle is the most abundant type of muscle in the body. Tendons are the connective tissue that attaches skeletal muscle to bones. Skeletal muscles pull on tendons, which in turn pull on bones to carry out voluntary movements.
92.7K
Disorders of the Skeletal Muscle01:28

Disorders of the Skeletal Muscle

1.7K
The clinical conditions affecting the skeletal muscle tissue are broadly categorized as musculoskeletal and neuromuscular disorders.
Musculoskeletal disorders
Musculoskeletal disorders involve injuries and conditions affecting the skeletal muscles and associated connective tissues. These disorders can arise from acute biomechanical stresses or chronic overuse and can occur across different age groups. Common injuries include sprains, fractures, and muscular strains, often resulting from...
1.7K

こちらも読む

関連記事

共著者、ジャーナル、引用グラフによってこの研究に関連する記事。

並び替え
Same author

Evaluation of high-fat diet-induced metabolic impairments in iBAT lipid metabolism using <sup>1</sup>H-MRS.

Magma (New York, N.Y.)·2026
Same author

Sex-specific CT-derived reference cutoffs for body composition in healthy Brazilian adults: a multicenter study.

Scientific reports·2026
Same authorSame journal

Association of Testosterone With Lean Soft Tissue and Handgrip Strength Across Middle-Aged Men.

Journal of cachexia, sarcopenia and muscle·2026
Same author

Glucagon-Like Peptide-1 Receptor Agonist-Based Agents and Body Composition: Filling More Gaps.

Obesity (Silver Spring, Md.)·2026
Same author

Reference method matters: DXA system differences influence agreement with 3D optical imaging body composition estimates.

International journal of obesity (2005)·2026
Same author

PRONTO nutritional risk identification protocol: Exploratory findings on survival prediction and comparison with the Patient-Generated Subjective Global Assessment.

Nutrition (Burbank, Los Angeles County, Calif.)·2026

関連する実験動画

Updated: Jan 21, 2026

Manual Muscle Testing: A Method of Measuring Extremity Muscle Strength Applied to Critically Ill Patients
09:44

Manual Muscle Testing: A Method of Measuring Extremity Muscle Strength Applied to Critically Ill Patients

Published on: April 12, 2011

83.0K

骨格筋量の測定法に関する基準法：批判的考察

Steven B Heymsfield1, Houchun H Hu2, Edvin Johanssen3

  • 1Pennington Biomedical Research Center, LSU System, Baton Rouge, Louisiana, USA.

Journal of cachexia, sarcopenia and muscle
|January 20, 2026
PubMed
まとめ
この要約は機械生成です。

ヒトの骨格筋（SM）量を測定するための単一のゴールドスタンダードは存在しない。本レビューは、正確なSM定量化のための生体測定法の標準化されたプロトコルと正確な用語の必要性を強調する。

キーワード:
生体組成悪液質フレイル栄養失調栄養評価肥満サルコペニア

さらに関連する動画

Measurement of Protein Import Capacity of Skeletal Muscle Mitochondria
09:01

Measurement of Protein Import Capacity of Skeletal Muscle Mitochondria

Published on: January 7, 2022

3.0K
Measuring Skeletal Muscle Thermogenesis in Mice and Rats
07:56

Measuring Skeletal Muscle Thermogenesis in Mice and Rats

Published on: July 27, 2022

3.5K

関連する実験動画

Last Updated: Jan 21, 2026

Manual Muscle Testing: A Method of Measuring Extremity Muscle Strength Applied to Critically Ill Patients
09:44

Manual Muscle Testing: A Method of Measuring Extremity Muscle Strength Applied to Critically Ill Patients

Published on: April 12, 2011

83.0K
Measurement of Protein Import Capacity of Skeletal Muscle Mitochondria
09:01

Measurement of Protein Import Capacity of Skeletal Muscle Mitochondria

Published on: January 7, 2022

3.0K
Measuring Skeletal Muscle Thermogenesis in Mice and Rats
07:56

Measuring Skeletal Muscle Thermogenesis in Mice and Rats

Published on: July 27, 2022

3.5K

科学分野:

  • 生理学
  • 生物医学工学
  • 医用画像処理

背景:

  • 骨格筋（SM）は、健康と疾患において重要な役割を果たしている。
  • ヒトのSM量の定量化は、普遍的に受け入れられているゴールドスタンダード法を欠いている。
  • 現在の法は、invitro法とinvivo法に大別される。

研究 の 目的:

  • ヒトの骨格筋量と組成を定量化するための既存のinvivo法の批判的レビュー。
  • 現在の基準法の限界とその誘導技術への影響の特定。
  • SM測定の精度、再現性、および明確性を向上させるための推奨事項の提案。

主な方法:

  • 骨格筋定量化のためのinvitro法およびinvivo法の系統的レビュー。
  • invivo法を基準法（上位）および二次法（下位）に分類。
  • 基準法（CT、MRI、DXA）のプロトコル、用語、および検証手順の批判的分析。

主要な成果:

  • invitro法はほとんど報告されておらず、現在の臨床用途には適していない。
  • 3つのinvivo法（CT、MRI、DXA）は基準法と見なされているが、標準化されたプロトコルと用語が欠如している。
  • 下位の法は基準法に対する校正が必要であり、不正確さを伝播させる。
  • 基準法では、取得プロトコルと画像解析に大きなばらつきが存在する。

結論:

  • invivo骨格筋量定量化のための決定的なゴールドスタンダードは存在しない。
  • SM測定におけるCT、MRI、およびDXAには、標準化されたプロトコルと正確な用語が不可欠である。
  • 筋肉量と組成分析のための最適なガイドラインを確立するには、将来の専門家コンセンサスが必要である。