ISSN:
1432-2013
Keywords:
Ion-selective microelectrodes
;
Muscle contraction
;
Extracellular muscle K+
;
Human muscle
Source:
Springer Online Journal Archives 1860-2000
Topics:
Medicine
Notes:
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.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00656721
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