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Related Concept Videos

Gross Anatomy of Skeletal Muscles01:12

Gross Anatomy of Skeletal Muscles

The connective tissues play a significant role in arranging the muscle fibers into a hierarchical structure that forms a complete muscle. Consider a muscle like the bicep brachii, commonly called the bicep. This muscle comprises thousands of muscle fibers enclosed by a protective layer of connective tissue called the endomysium. The endomysium is primarily composed of reticular fibers, a type of thin collagen fiber. It allows the exchange of nutrients and waste products at the fiber level,...
Classification of Skeletal Muscle Fibers01:48

Classification of Skeletal Muscle Fibers

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...
Skeletal Muscle Anatomy00:55

Skeletal Muscle Anatomy

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.
Muscles of the Thorax01:25

Muscles of the Thorax

The thorax muscles are central to the body's respiration and provide essential support and movement for the upper body. They are intricately designed to facilitate the complex breathing process while also contributing to the structural integrity and mobility of the chest and upper limbs.
The diaphragm is at the core of thoracic musculature, the primary muscle involved in breathing. This expansive, dome-shaped muscle marks the division between the thoracic and abdominal cavities. It originates...

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Related Experiment Video

Updated: Jun 8, 2026

Skeletal Muscle Gender Dimorphism from Proteomics
09:29

Skeletal Muscle Gender Dimorphism from Proteomics

Published on: December 14, 2011

Gender differences in MR muscle tractography.

Yoshikazu Okamoto1, Akira Kunimatsu, Tatsuo Kono

  • 1Department of Radiology, Institute of Clinical Medicine, University of Tsukuba Hospital, Tsukuba, Ibaraki, Japan. yokamoto@md.tsukuba.ac.jp

Magnetic Resonance in Medical Sciences : MRMS : an Official Journal of Japan Society of Magnetic Resonance in Medicine
|October 2, 2010
PubMed
Summary
This summary is machine-generated.

Gender significantly impacts skeletal muscle MRI tractography visualization, with better results in women than men. Age did not show a significant difference in visualizing muscle fibers.

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Quantitative Magnetic Resonance Imaging of Skeletal Muscle Disease
09:30

Quantitative Magnetic Resonance Imaging of Skeletal Muscle Disease

Published on: December 18, 2016

Area of Science:

  • Biomedical Imaging
  • Musculoskeletal Imaging
  • Medical Physics

Background:

  • Magnetic Resonance (MR) tractography visualizes skeletal muscle fiber 3D courses, offering potential for diagnostic imaging.
  • Variability in visualized tract numbers among individuals and muscles necessitates understanding influencing factors.
  • Investigating individual parameters is crucial for consistent, high-quality muscle fiber tractography.

Purpose of the Study:

  • To ascertain gender- and age-specific differences in MR tractography of skeletal muscle fiber.
  • To identify how demographic factors influence muscle visualization quality.

Main Methods:

  • 33 healthy volunteers were grouped by gender and age (younger men, younger women, older men).
  • Tractographs of 8 calf muscles (gastrocnemius medialis, gastrocnemius lateralis, soleus, anterior tibialis) were acquired.
  • Fiber visualization was graded, and Mann-Whitney U-test compared scores by gender and age.

Main Results:

  • Significantly better muscle tract visualization was observed in women compared to men (median scores 34 vs. 24, P<0.05).
  • Soleus muscles showed markedly improved visualization in women across both sides (P<0.05).
  • No significant age-related differences in visualization were found; gastrocnemius lateralis scored highest overall.

Conclusions:

  • Gender is a significant factor influencing the visualization quality of calf muscle fiber tractography.
  • These findings highlight the need to consider gender when interpreting MR tractography of skeletal muscles.
  • Further research may refine techniques to optimize visualization across diverse populations.