Coactivation pattern in human quadriceps during isokinetic knee-extension by muscle functional MRI

We tested activation patterns of individual muscles and neuromuscular compartments (NMCs) of the quadriceps femoris (QF) during knee-extension exercises (KEE). Eight healthy men performed repetitive isokinetic KEE at 120 degrees s(-1). Before and after KEE, muscle functional magnetic resonance image...

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Bibliographic Details
Published in:European journal of applied physiology 2004-01, Vol.91 (1), p.7-14
Main Authors: Akima, Hiroshi, Takahashi, Hideyuki, Kuno, Shin-ya, Katsuta, Shigeru
Format: Article
Language:English
Subjects:
Adult
Humans
Knee Joint - physiology
Magnetic Resonance Imaging - instrumentation
Male
Muscle, Skeletal - physiology
Muscular system
NMR
Nuclear magnetic resonance
Thigh - physiology
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Summary:We tested activation patterns of individual muscles and neuromuscular compartments (NMCs) of the quadriceps femoris (QF) during knee-extension exercises (KEE). Eight healthy men performed repetitive isokinetic KEE at 120 degrees s(-1). Before and after KEE, muscle functional magnetic resonance images of the thigh were taken to calculate transverse relaxation times (T2) for the individual muscles of the QF. In terms of exercised T2, a moderate correlation was observed between the rectus femoris (RF) and vastus medialis (VM) ( r=0.493, P
ISSN:1439-6319
1439-6327
DOI:10.1007/s00421-003-0942-z