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Motor unit recruitment and discharge behavior in movements and isometric contractions (a reply)

✍ Scribed by T. Ivanova; S.J. Garland; K.J. Miller

Publisher: John Wiley and Sons
Year: 1998
Tongue: English
Weight: 23 KB
Volume: 21
Category: Article
ISSN: 0148-639X
DOI: 10.1002/(sici)1097-4598(199803)21:3<414::aid-mus21>3.0.co;2-y

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✦ Synopsis

against external support. In both cases a permanent increase of the muscle force during the entire contraction is required. We have not found a ''triphasic'' pattern of muscle activation even during very fast movements. The ''triphasic'' pattern was not evident during eccentric movements either (see Fig. 1). Both eccentric and concentric movements accompanied by external torque opposite or in the direction of the movement are rather natural, and the corresponding torque changes can be easily matched during isometric contractions. Additionally, it is possible to calculate with a sufficient accuracy the actual muscle force changes during a given movement and for a given subject and to compare the discharge patterns of the same MU during movements and during isometric contractions.

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