Optimal inter-stimulus interval for interpolated twitch technique when using double pulse stimulation

Interpolated twitch technique is a method frequently used to assess voluntary activa- tion. This method uses electrically evoked twitch superimposed on the voluntary activi- ty and its comparison with the twitch in rested muscle i.e. control twitch, to evaluate completeness of muscle activation. The...

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Päätekijä: Karimpour, Rana
Muut tekijät: Liikuntatieteellinen tiedekunta, Faculty of Sport and Health Sciences, Liikuntabiologian laitos, Department of Biology of Physical Activity, University of Jyväskylä, Jyväskylän yliopisto
Aineistotyyppi: Pro gradu
Kieli:eng
Julkaistu: 2013
Aiheet:
Linkit: https://jyx.jyu.fi/handle/123456789/42654
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author Karimpour, Rana
author2 Liikuntatieteellinen tiedekunta Faculty of Sport and Health Sciences Liikuntabiologian laitos Department of Biology of Physical Activity University of Jyväskylä Jyväskylän yliopisto
author_facet Karimpour, Rana Liikuntatieteellinen tiedekunta Faculty of Sport and Health Sciences Liikuntabiologian laitos Department of Biology of Physical Activity University of Jyväskylä Jyväskylän yliopisto Karimpour, Rana Liikuntatieteellinen tiedekunta Faculty of Sport and Health Sciences Liikuntabiologian laitos Department of Biology of Physical Activity University of Jyväskylä Jyväskylän yliopisto
author_sort Karimpour, Rana
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description Interpolated twitch technique is a method frequently used to assess voluntary activa- tion. This method uses electrically evoked twitch superimposed on the voluntary activi- ty and its comparison with the twitch in rested muscle i.e. control twitch, to evaluate completeness of muscle activation. The purpose of this study was to investigate the ef- fect of interval in paired stimulation on control twitch in young and elderly individuals with bent and flexed knee positions. Supramaximal electrical stimulation consisted of one single stimulus and eight paired stimulation with intervals from 5 to 40ms, with increments of 5ms. In evoked twitches normalized peak torque amplitude (NPT), time to peak torque (TPT), half-relaxation time (HRT), maximal rate of torque development (RTD) were calculated. Although all parameters were slightly different in young adults compared to elder ones, the difference reached significance only in shorter TPT and HRT for the former, a phenomenon attributed to the slowing of muscle contractile me- chanics with ageing. In both groups the highest RTD and NPT were observed with shorter inter-stimulus intervals i.e. 5 and 10ms. This may be attributed to a summation effect and/or a less time available for the longer-latency reflex effects of electrical stim- ulation to affect the torque.
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spellingShingle Karimpour, Rana Optimal inter-stimulus interval for interpolated twitch technique when using double pulse stimulation itt interpolated twitch technique voluntary activation doublet paired stimuli Biomekaniikka Biomechanics 5012 biomekaniikka ärsykkeet lihakset
title Optimal inter-stimulus interval for interpolated twitch technique when using double pulse stimulation
title_full Optimal inter-stimulus interval for interpolated twitch technique when using double pulse stimulation
title_fullStr Optimal inter-stimulus interval for interpolated twitch technique when using double pulse stimulation Optimal inter-stimulus interval for interpolated twitch technique when using double pulse stimulation
title_full_unstemmed Optimal inter-stimulus interval for interpolated twitch technique when using double pulse stimulation Optimal inter-stimulus interval for interpolated twitch technique when using double pulse stimulation
title_short Optimal inter-stimulus interval for interpolated twitch technique when using double pulse stimulation
title_sort optimal inter stimulus interval for interpolated twitch technique when using double pulse stimulation
title_txtP Optimal inter-stimulus interval for interpolated twitch technique when using double pulse stimulation
topic itt interpolated twitch technique voluntary activation doublet paired stimuli Biomekaniikka Biomechanics 5012 biomekaniikka ärsykkeet lihakset
topic_facet 5012 Biomechanics Biomekaniikka biomekaniikka doublet interpolated twitch technique itt lihakset paired stimuli voluntary activation ärsykkeet
url https://jyx.jyu.fi/handle/123456789/42654 http://www.urn.fi/URN:NBN:fi:jyu-201312132796
work_keys_str_mv AT karimpourrana optimalinterstimulusintervalforinterpolatedtwitchtechniquewhenusingdoublepulsestim