Triceps surae fascicle stretch is poorly correlated with short latency stretch reflex size
Cronin, N., Rantalainen, T., & Avela, J. (2015). Triceps surae fascicle stretch is poorly correlated with short latency stretch reflex size. Muscle and Nerve, 52(2), 245-251. https://doi.org/10.1002/mus.24538
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Muscle and NerveDate
2015Copyright
© 2014 Wiley Periodicals, Inc. This is a final draft version of an article whose final and definitive form has been published by Wiley. Published in this repository with the kind permission of the publisher.
Introduction: The short latency stretch reflex (SLR) is well described, but the stimulus that
evokes the SLR remains elusive. One hypothesis states that reflex size is proportional to
muscle fiber stretch, so this study examined the relationship between these 2 parameters in
human triceps surae muscles.
Methods: Achilles tendon taps and dorsiflexion stretches with different amplitudes and
preactivation torques were applied to 6 participants while electromyography and muscle
fascicle length changes were recorded in soleus and medial gastrocnemius (MG).
Results: In response to tendon taps, neither fascicle length nor velocity changes were
correlated with SLR size in either muscle, but accelerometer peaks were observed
immediately after hammer-tendon contact. Similar results were obtained after dorsiflexion
stretches.
Discussion: Muscle fascicle stretch is poorly correlated with SLR size, regardless of
perturbation parameters. We attribute the SLR trigger to the transmission of vibration through
the lower limb, rather than muscle fiber stretch.
...
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JohnWiley & Sons, Inc.; American Association of Neuromuscular & Electrodiagnostic MedicineISSN Search the Publication Forum
0148-639XPublication in research information system
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