NDLI: In epimuscularly connected muscle previous activity at high length yields sizable history effects causing decreased muscle force at low lengths

Content Provider	IEEE Xplore Digital Library
Author	Ates, F. Huijing, P.A. Yucesoy, C.A.
Copyright Year	2009
Description	Author affiliation: Faculteit Bewegingswetenschappen, Vrije Universiteit, Amsterdam, the Netherlands (Huijing, P.A.) \|\| Bo¿aziçi Üniversitesi, Biyomedikal Mühendisli¿i Enstitüsü, Bebek, ¿stanbul, Turkey (Ates, F.; Yucesoy, C.A.)
Abstract	History effects are the changes in isometric forces of muscles previously activated at high length. The aim of our study was to investigate determinants of history effects in the context of epimuscular myofascial force transmission. Isometric forces of maximally active extensor digitorum longus (EDL) muscle, as well as tibialis anterior and extensor hallicus longus muscle complex (TA+EHL) of the rat were measured simultaneously. (i) length-force (l-f) data were collected and (ii) control measurements were performed at EDL optimum (higher) length and ii) at reference (lower) length. Between consecutive contractions muscles were allowed to recover for 2 min. History effects were quantified as Fl-f-Fcontrol for the indicated lengths. 4 conditions were studied: (1) in the intact condition, during extensor digitorum longus (EDL) lengthening, at low length of EDL, history effects were 45.49%. However, no significant effects were shown for the forces at high length of EDL and restrained TA+EHL. (2) Second control measurements taken 15 minutes after first ones showed that extra time increased the history effects (i.e. EDL proximal force decrease increased from 41.53% to 55.69%). (3) After simultaneous lengthening of EDL and TA+EHL history effects decreased by 42.12% (4) History effects decreased to %34.92 after blunt dissection and 29.56% after fasciotomy. Our study showed that history effect is a fundamental phenomenon determined by intrinsic muscle properties and epimuscular connections may change this effect.
Starting Page	1
Ending Page	4
File Size	408316
Page Count	4
File Format	PDF
ISBN	9781424436057
DOI	10.1109/BIYOMUT.2009.5130297
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-05-20
Publisher Place	Turkey
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Performance evaluation Force measurement History effects EDL muscle TA+EHL muscle complex Muscles Length measurement Time measurement History Force control isometric force
Content Type	Text
Resource Type	Article

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