Abstract
Effects of lengthening of the whole group of anterior crural muscles (tibialis anterior and extensor hallucis longus muscles (TA + EHL) and extensor digitorum longus (EDL)) on myofascial interaction between synergistic EDL and TA + EHL muscles, and on myofascial force transmission between anterior crural and antagonistic peroneal muscles, were investigated. All muscles were either passive or maximally active. Peroneal muscles were kept at a constant muscle tendon complex length. Either EDL or all anterior crural muscles were lengthened so that effects of lengthening of TA + EHL could be analyzed. For both lengthening conditions, a significant difference in proximally and distally measured EDL passive and active forces, indicative of epimuscular myofascial force transmission, was present. However, added lengthening of TA + EHL significantly affected the magnitude of the active and passive load exerted on EDL. For the active condition, the direction of the epimuscular load on EDL was affected; at all muscle lengths a proximally directed load was exerted on EDL, which decreased at higher muscle lengths. Lengthening of anterior crural muscles caused a 26% decrease in peroneal active force.
Extramuscular myofascial connections are thought to be the major contributor to the EDL proximo-distal active force difference. For antagonistic peroneal complex, the added distal lengthening of a synergistic muscle increases the effects of extramuscular myofascial force transmission.
Original language | English |
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Pages (from-to) | 698-707 |
Number of pages | 10 |
Journal | Journal of electromyography and kinesiology |
Volume | 17 |
Issue number | 6 |
DOIs | |
Publication status | Published - 2007 |
Keywords
- Peroneal muscles
- Tibialis anterior muscle
- IR-78856
- Connective tissue
- METIS-240691
- Antagonistic musclesMyofascial force transmission
- Myofascial force transmission
- Extensor digitorum longus muscle
- Antagonistic muscles