Anatomy

Fast-Twitch Muscle Fibers

Skeletal muscle fibers characterized by their expression of the Type II MYOSIN HEAVY CHAIN isoforms which have high ATPase activity and effect several other functional properties - shortening velocity, power output, rate of tension redevelopment. Several fast types have been identified.

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

Skeletal muscle fibers characterized by their expression of the Type II MYOSIN HEAVY CHAIN isoforms which have high ATPase activity and effect several other functional properties - shortening velocity, power output, rate of tension redevelopment. Several fast types have been identified.

MeSH Record

Classification

Broader headings

Related Concepts

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MeSH Record

Synonyms

19 entry terms
  • Muscle Fibers, Fast-Twitch
  • Muscle Fibers, Type II
  • Fast-Twitch Muscle Fiber
  • Fiber, Fast-Twitch Muscle
  • Fibers, Fast-Twitch Muscle
  • Muscle Fiber, Fast-Twitch
  • Muscle Fibers, Fast Twitch
  • Muscle Fibers, Intermediate
  • Muscle Fibers, White
  • Fiber, Intermediate Muscle
  • Fiber, White Muscle
  • Fibers, Intermediate Muscle
  • Fibers, White Muscle
  • Intermediate Muscle Fiber
  • Intermediate Muscle Fibers
  • Muscle Fiber, Intermediate
  • Muscle Fiber, White
  • White Muscle Fiber
  • White Muscle Fibers

MeSH Record

Aspects Covered

15 allowable subheadings

Indexed with the subheadings chemistry, classification, cytology, drug effects, enzymology, immunology, metabolism, microbiology, parasitology, pathology, physiology, radiation effects, transplantation, ultrastructure, virology.

MeSH Record

History Note

95

MeSH Hierarchy

Tree Numbers

AMA Style

References

  1. National Library of Medicine. Fast-Twitch Muscle Fibers. Medical Subject Headings (MeSH). 2026. Unique ID D018656. http://id.nlm.nih.gov/mesh/2026/D018656
  2. Fast-Twitch Muscle Fibers. In: Wikidata. https://www.wikidata.org/wiki/Q70204070