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01-12-2010 | Original Article

Changes in muscle fascicles of tibialis anterior during anisometric contractions are not associated with motor-output variability of the ankle dorsiflexors in young and old adults

Authors: Mark Jesunathadas, Thorsten Rudroff, Roger M. Enoka

Published in: European Journal of Applied Physiology | Issue 6/2010

Abstract

This study examined the associations between the fluctuations of foot acceleration during shortening and lengthening contractions with the electromyographic (EMG) activity of lower leg muscles and ultrasound measures of tibialis anterior fascicle length and pennation angle. Young (24.9 ± 4.17 years) and old (74.8 ± 3.31 years) adults lifted and lowered a submaximal load with the foot at different speeds (3°/s–50°/s). The standard deviation (SD) of foot acceleration normalized to the load lifted was similar for young (12.2 ± 7.22 cm s⁻²/kg) and old adults (14.3 ± 8.03 cm s⁻²/kg; P = 0.093). The changes in tibialis anterior muscle fascicle length and pennation angle were similar for young and old adults (P ≥ 0.233), but greater for shortening (fascicle length: 0.937 ± 0.633 cm, pennation angle: 1.61 ± 0.918º) than for lengthening contractions (fascicle length: 0.806 ± 0.521 cm, pennation angle: 0.966 ± 0.632º; P ≤ 0.014). The changes in fascicle length and pennation angle were not associated with the SD of foot acceleration (r ² ≤ 0.031; P ≥ 0.092). The surface EMG of tibialis anterior was greater for the shortening contractions than for the lengthening contractions (P < 0.001), but triceps surae EMG was similar for the two types of contractions (P = 0.304). The results suggested that the influence of movement speed on variability in performance was similar for shortening and lengthening contractions with the dorsiflexor muscles; furthermore, old adults were able to match the performance of young adults.

Barry BK, Pascoe MA, Jesunathadas M, Enoka RM (2007) Rate coding is compressed but variability is unaltered for motor units in a hand muscle of old adults. J Neurophysiol 97:3206–3218CrossRefPubMed

Bazzucchi I, Felici F, Macaluso A, De Vito G (2004) Differences between young and older women in maximal force, force fluctuations, and surface EMG during isometric knee extension and elbow flexion. Muscle Nerve 30:626–635CrossRefPubMed

Burnett RA, Laidlaw DH, Enoka RM (2000) Coactivation of the antagonist muscle does not covary with steadiness in old adults. J Appl Physiol 89:61–71PubMed

Carville SF, Perry MC, Rutherford OM, Smith ICH, Newham DJ (2007) Steadiness of quadriceps contractions in young and older adults with and without a history of falling. Eur J Appl Physiol 100:527–533CrossRefPubMed

Cavagna GA, Kaneko M (1977) Mechanical work and efficiency in level walking and running. J Physiol 268:467–481PubMed

Christou EA, Carlton LG (2002a) Age and contraction type influence motor output variability in rapid discrete tasks. J Appl Physiol 93:489–498PubMed

Christou EA, Carlton LG (2002b) Motor output is more variable during eccentric compared with concentric contractions. Med Sci Sports Exerc 34:1773–1778CrossRefPubMed

Christou EA, Carlton LG (2002c) Old adults exhibit greater motor output variability than young adults only during rapid discrete isometric contractions. J Gerontol 56A:B524–B532

Christou EA, Enoka RM (2010) Aging and movement errors when lifting and lowering light loads. Age (in revision)

Christou EA, Shinohara M, Enoka RM (2003) Fluctuations in acceleration during voluntary contractions lead to greater impairment of movement accuracy in old adults. J Appl Physiol 95:373–384PubMed

Christou EA, Poston B, Enoka JA, Enoka RM (2007) Different neural adjustments improve endpoint accuracy with practice in young and old adults. J Neurophysiol 97:3340–3350CrossRefPubMed

Dey DK, Bosaeus I, Lissner L, Steen B (2009) Changes in body composition and its relation to muscle strength in 75-year-old men and women: a 5-year prospective follow-up study of the NORA cohort in Götegberg, Sweden. Nutrition 25:613–619CrossRefPubMed

Elias NJ, Bryden MP, Bulman-Fleming MB (1998) Footedness is a better predictor than is handedness of emotional lateralization. Neuropsychologia 36:37–43CrossRefPubMed

Forrest KY, Zmuda JM, Cauley JA (2007) Patterns and correlates of muscle strength loss in older women. Gerontology 53:40–47CrossRef

Fukunaga T, Ichinose Y, Ito M, Kawakami Y, Fukashiro S (1997) Determination of fascicle length and pennation in a contracting human muscle in vivo. J Appl Physiol 82:354–358PubMed

Fukunaga T, Kubo K, Kawakami Y, Fukashiro S, Kanehisa H, Maganaris CN (2001) In vivo behaviour of human muscle tendon during walking. Proc R Soc Lond B Biol Sci 268:229–233CrossRef

Goodpaster BH, Park SW, Harris TB, Kritchevsky SB, Nevitt M, Schwartz AV, Simonsick EM, Tylvasky FA, Visser M, Newman AB (2006) The loss of skeletal muscle strength, mass, and quality in older adults: the health, aging and body composition study. J Gerontol 61A:1059–1064

Graves AE, Kornatz KW, Enoka RM (2000) Older adults use a unique strategy to lift inertial loads with the elbow flexor muscles. J Neurophysiol 83:2030–2039PubMed

Hamilton AF, Jones KE, Wolpert DM (2004) The scaling of motor noise with muscle strength and motor unit number in humans. Exp Brain Res 157:417–430CrossRefPubMed

Hortobagyi T, Tunnel D, Moody J, Beam S, DeVita P (2001) Low- or high-intensity strength training partially restores impaired quadriceps force accuracy and steadiness in aged adults. J Gerentol Biol Sci 56A:1138–1147

Ishikawa M, Komi PV, Grey MJ, Lepola V, Brüggemann GP (2005) Muscle–tendon interaction and elastic energy usage in human walking. J Appl Physiol 99:603–608CrossRefPubMed

Jesunathadas M, Klass M, Duchateau J, Enoka RM (2008) Motor unit discharge during steady isometric contractions with the dorsiflexor muscles. North American Congress on Biomechanics (American Society of Biomechanics), Ann Arbor, MI

Kawakami Y, Kubo K, Kanehisa H, Fukunaga T (2002) Effect of series elasticity on isokinetic torque–angle relationship in humans. Eur J Appl Physiol 87:381–387CrossRefPubMed

Keen A, Yue GH, Enoka RM (1994) Training-related enhancement in the control of motor output in elderly humans. J Appl Physiol 77:2648–2658PubMed

Klass M, Baudry S, Duchateau J (2008) Age-related decline in rate of torque development is accompanied by lower maximal motor unit discharge frequency during fast contractions. J Appl Physiol 104:739–746CrossRefPubMed

Kornatz KW, Christou EA, Enoka RM (2005) Practice reduces motor unit discharge variability in a hand muscle and improves manual dexterity in old adults. J Appl Physiol 98:2072–2080CrossRefPubMed

Laidlaw DH, Bilodeau M, Enoka RM (2000) Steadiness is reduced and motor unit discharge is more variable in old adults. Muscle Nerve 23:600–612CrossRefPubMed

Laidlaw DH, Hunter SK, Enoka RM (2002) Nonuniform activation of the agonist muscle does not covary with index finger acceleration in old adults. J Appl Physiol 93:1400–1410PubMed

Lexell J, Taylor CC, Sjostrom M (1988) What is the cause of the ageing atrophy? Total number, size and proportion of the different fiber types studied in whole vastus lateralis muscle from 15- to 83-year-old men. J Neurol Sci 84:275–294CrossRefPubMed

Maganaris CN (2001) Force-length characteristics of in vivo human skeletal muscle. Acta Physiol Scand 172:279–285CrossRefPubMed

Maganaris CN, Baltzopoulos V, Sargeant AJ (1998) In vivo measurements of the triceps surae complex architecture in man: implications for muscle function. J Physiol 512:603–614CrossRefPubMed

Marmon AR, Pascoe MA, Enoka RM (2008). Associations between force steadiness and tests of hand function across the adult life span. Soc Neurosci Abstr Washington, DC #145.16/V31

Moritz CT, Barry BK, Pascoe MA, Enoka RM (2005) Discharge rate variability influences the variation in force fluctuations across the working range of a hand muscle. J Neurophysiol 93:2449–2459CrossRefPubMed

Nakagawa Y, Hayashi K, Yamamoto N (1996) Age-related changes in biomechanical properties of the Achilles tendon in rabbits. Eur J Appl Physiol 73:7–10CrossRef

Narici MV, Maffiuli N (2010) Sarcopenia: characteristics, mechanisms and functional significance. Br Med Bull (in press)

Narici MV, Maganaris CN (2006) Adaptability of elderly human muscles and tendons to increased loading. J Anat 208:433–443CrossRefPubMed

Narici MV, Maganaris CN, Reeves ND, Capodaglio P (2003) Effect of aging on human muscle architecture. J Appl Physiol 95:2229–2234PubMed

Ofori E, Samson JM, Sosnoff JJ (2010) Age-related differences in force variability and visual display. Exp Brain Res 203:299–306

Pasquet B, Carpentier A, Duchateau J (2006) Specific modulation of motor unit discharge for a similar change in fascicle length during shortening and lengthening contractions in humans. J Physiol 577:753–765CrossRefPubMed

Poston B, Enoka JA, Enoka RM (2008a) Endpoint accuracy for a small and a large hand muscle in young and old adults during rapid, goal-directed isometric contractions. Exp Brain Res 187:373–385CrossRefPubMed

Poston B, Enoka JA, Enoka RM (2008b) Practice and endpoint accuracy with the left and right hands of old adults: the right-hemisphere aging model. Muscle Nerve 37:376–386CrossRefPubMed

Reeves ND, Narici MV (2003) Behavior of human muscle fascicles during shortening and lengthening contractions in vivo. J Appl Physiol 95:1090–1096PubMed

Rudroff T, Jesunathadas M, Gibb J, Enoka RM (2009) The association between fluctuations in foot acceleration and muscle architecture of the tibialis anterior. Soc Neurocsci Abstr Chicago, IL #179.16/BB37

Semmler JG (2002) Motor unit synchronization and neuromuscular performance. Exerc Sport Sci Rev 30:8–14CrossRefPubMed

Semmler JG, Steege JW, Kornatz KW, Enoka RM (2000) Motor-unit synchronization is not responsible for larger motor-unit forces in old adults. J Neurophysiol 84:358–366PubMed

Seynnes O, Hue OA, Garrandes F, Colson SS, Bernard PL, Legros P, Fiatarone Singh MA (2005) Force steadiness in the lower extremities as an independent predictor of functional performance in older women. J Aging Phys Act 13:395–408PubMed

Sosnoff JJ, Voudrie SJ (2009) Practice and age-related loss of adaptability in sensorimotor performance. J Motor Behav 41:137–145CrossRef

Spanjaard M, Reeves ND, van Dieën JH, Baltzopoulos V, Maganaris CN (2009) Influence of gait velocity on gastrocnemius muscle fascicle behaviour during stair negotiation. J Electromyogr Kinesiol 19:304–313CrossRefPubMed

Thom JM, Morse CI, Birch KM, Narici MV (2007) Influence of muscle architecture on the torque and power-velocity characteristics of young and elderly men. Eur J Appl Physiol 100:613–619CrossRefPubMed

Tracy BL (2007) Force control is impaired in the ankle plantarflexors of elderly adults. Eur J Appl Physiol 101:629–636CrossRefPubMed

Tracy BL, Enoka RM (2002) Older adults are less steady during submaximal isometric contractions with the knee extensor muscles. J Appl Physiol 92:1004–1012PubMed

Tracy BL, Enoka RM (2006) Steadiness training with light loads in the knee extensors of elderly adults. Med Sci Sport Exerc 38:735–745CrossRef

Tracy BL, Dinenno DV, Jorgensen B, Welsh SJ (2007) Aging, visuomotor correction, and force fluctuations in large muscles. Med Sci Sports Exerc 39:469–479CrossRefPubMed

Vaillancourt DE, Sosnoff JJ, Newell KM (2004) Age-related changes in complexity depend on task dynamics. J Appl Physiol 97:454–455CrossRefPubMed

Yamauchi J, Mishima C, Nakayama S, Ishii N (2009) Force–velocity, force–power relationships of bilateral and unilateral leg multi-joint movements in young and elderly women. J Biomech 42:2151–2157CrossRefPubMed

Title: Changes in muscle fascicles of tibialis anterior during anisometric contractions are not associated with motor-output variability of the ankle dorsiflexors in young and old adults
Authors: Mark Jesunathadas
Thorsten Rudroff
Roger M. Enoka
Publication date: 01-12-2010
Publisher: Springer-Verlag
Published in: European Journal of Applied Physiology / Issue 6/2010
Print ISSN: 1439-6319
Electronic ISSN: 1439-6327
DOI: https://doi.org/10.1007/s00421-010-1606-4

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Changes in muscle fascicles of tibialis anterior during anisometric contractions are not associated with motor-output variability of the ankle dorsiflexors in young and old adults

Abstract

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Abstract

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