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Pflügers Archiv

, Volume 399, Issue 3, pp 235–237 | Cite as

The measurement of K e + concentration changes in human muscles during volitional contractions

  • F. Vyskočil
  • P. Hník
  • H. Rehfeldt
  • R. Vejsada
  • E. Ujec
Excitable Tissues and Central Nervous Physiology

Abstract

Changes of extracellular potassium concentration ([K+]e) were measured in human muscles during volitional isometric contractions using liquid ion-exchanger electrodes. In principle, an intramuscular injection needle containing a microelectrode with a side-pore was inserted into the brachioradialis muscle. After insertion of the needle, the glass ion-selective microelectrode (ISM) could be moved out of the protective trocar shield into the muscle tissue. The average values of [K+]e in human muscles during maximal effort rose from 4.5 mmol/l K+ to 9.5 mmol/l K+. These values correspond closely to those previously found in muscles of experimental animals.

Key words

Ion-selective microelectrodes Muscle contraction Extracellular muscle K+ Human muscle 

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Copyright information

© Springer-Verlag 1983

Authors and Affiliations

  • F. Vyskočil
    • 1
  • P. Hník
    • 1
  • H. Rehfeldt
    • 2
  • R. Vejsada
    • 1
  • E. Ujec
    • 1
  1. 1.Institute of PhysiologyCzechoslovak Academy of SciencesPrague 4Czechoslovakia
  2. 2.Zentralinstitut für Arbeitsmedizin der DDRBerlinGerman Democratic Republic

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