Influence of stimulus cross talk on results of the twitch-interpolation technique at the biceps brachii muscle

Biceps brachii muscles of five healthy volunteers were tested with a high‐resolution twitch‐interpolation technique. Parameters of the electrical surface stimulation were varied. It was found that a supramaximal stimulus strength activates both biceps and triceps brachii motor units simultaneously s...

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Bibliographic Details
Published in:Muscle & nerve 1997-09, Vol.20 (9), p.1187-1190
Main Authors: Awiszus, Friedemann, Wahl, Birger, Meinecke, Ingmar
Format: Article
Language:English
Subjects:
Adult
Arm
biceps brachii
Biological and medical sciences
Electric Stimulation - methods
electrical surface stimulation
Female
Fundamental and applied biological sciences. Psychology
Humans
isometric contraction
Male
Middle Aged
Muscle Contraction - physiology
Muscle, Skeletal - physiology
Striated muscle. Tendons
Torque
twitch interpolation
Vertebrates: osteoarticular system, musculoskeletal system
Volition
voluntary activation
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Summary:Biceps brachii muscles of five healthy volunteers were tested with a high‐resolution twitch‐interpolation technique. Parameters of the electrical surface stimulation were varied. It was found that a supramaximal stimulus strength activates both biceps and triceps brachii motor units simultaneously severely affecting twitch‐interpolation results. Crosstalk contamination of twitches, however, can be avoided, if submaximal stimuli are used yielding twitch‐interpolation results for the biceps‐brachii that are similar to those of the quadriceps muscle. © 1997 John Wiley & Sons, Inc. Muscle Nerve 20:1187–1190, 1997
ISSN:0148-639X
1097-4598
DOI:10.1002/(SICI)1097-4598(199709)20:9<1187::AID-MUS17>3.0.CO;2-Q