Zur inneren Mechanik des gefiederten Muskels

Benninghoff, A.; Rollhäuser, H.

doi:10.1007/bf00362785

Cited by 157 publications

(45 citation statements)

References 2 publications

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“…Comparison with models of pennate muscle architecture Our model of segmented musculature is similar to the most widely used model for relating muscle fiber strain and fiber force to tendon excursion and muscle force in pennate musculature (Benninghoff and Rollhäuser, 1952;Gans and Bock, 1965;Alexander, 1968). More sophisticated pennate muscle models have also been developed, in which curved muscle fibers and deformation of the aponeuroses have been modeled Huijing and Woittiez, 1984;Zuurbier and Huijing, 1992;Van Leeuwen and Spoor, 1993).…”

Section: Limits To Initial and Final Muscle Fiber Anglesmentioning

confidence: 99%

Muscle fiber angle, segment bulging and architectural gear ratio in segmented musculature

Brainerd

Azizi

2005

Journal of Experimental Biology

128

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SUMMARY The anatomical complexity of myomeres and myosepta has made it difficult to develop a comprehensive understanding of the relationship between muscle fiber architecture, connective tissue mechanics, and locomotor function of segmented axial musculature in fishes. The lateral hypaxial musculature (LHM) of salamanders is less anatomically complex and therefore a good system for exploring the basic mechanics of segmented musculature. Here, we derive a mathematical model of the LHM and test our model using sonomicrometry and electromyography during steady swimming in an aquatic salamander, Siren lacertina. The model predicts longitudinal segment strain well, with predicted and measured values differing by less than 5% strain over most of the range. Deviations between predicted and measured results are unbiased and probably result from the salamanders performing slight turns with associated body torsion in our unconstrained trackway swimming experiments. Model simulations of muscle fiber contraction and segment shortening indicate that longitudinal segment strain, for a given amount of muscle fiber strain,increases with increasing initial fiber angle. This increase in architectural gear ratio (AGR = longitudinal strain/fiber strain) is mediated by muscle fiber rotation; the higher the initial fiber angle, the more the fibers rotate during contraction and the higher the AGR. Muscle fiber rotation is additionally impacted by bulging in the dorsoventral (DV) and/or mediolateral(ML) dimensions during longitudinal segment shortening. In segments with obliquely oriented muscle fibers, DV bulging increases muscle fiber rotation,thereby increasing the AGR. Extending the model to include force and work indicates that force decreases with increasing initial muscle fiber angle and increasing DV bulging and that both longitudinal shortening and DV bulging must be included for accurate calculation of segment work.

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Section: Limits To Initial and Final Muscle Fiber Anglesmentioning

confidence: 99%

Muscle fiber angle, segment bulging and architectural gear ratio in segmented musculature

Brainerd

Azizi

2005

Journal of Experimental Biology

128

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“…This distinction is not made only for didactic purposes but also because frequently muscle models are constructed according to the first group (e.g., Benninghoff and Rollhauser, 1952;Gans and Bock, 1965;Huijing and Woittiez, 1984;Huijing and Woittiez, 1985;Woittiez et al, 1984;Otten, 1988;Zajac, 1989;Scott and Winter, 1991;Hawkins and Hull, 1991;Burkholder et al, 1994). As in this type of modelling usually no mechanical interaction between fibres is incorporated it is implicitly equivalent to modelling a muscle as containing one giant fibre.…”

Section: Factors Affecting Isometric Muscle Length-force Characteristicsmentioning

confidence: 99%

“…Modelling of muscle geometry and its functional consequences has many times been performed as if muscle was build according to this description, i.e., any elastic effects were excluded (Stensen, 1667;Borelli, 1680;Benninghoff and Rollhauser, 1952;Gans and Bock, 1965;Huijing and Woittiez, 1984;Huijing and Woittiez, 1985;Woittiez et al, 1984;Burkholder et al, 1994). This type of muscle geometry is very rare but it occurs in some molluscs for muscle which can close the shell.…”

Section: Muscle Fibres Attached To Bony Elements At Both Endsmentioning

confidence: 99%

“…Considerable evidence is available indicating that the geometry of pennate muscle is not completely uniform (e.g., Beritoff, 1925;Benninghoff and Rollhauser, 1952;Rollhauser and Wendt, 1955;Willemse, 1963;Heukelom et al, 1979;Woittiez et al, 1984;Huijing, 1985;Gans and de Vree, 1987;Otten, 1988;Gans and Gaunt, 1991;van Leeuwen and Spoor, 1993;Zuurbier and Huijing, 1993;Ettema and Huijing, 1994a;Willems and Huijing, 1994a;Willems and Huijing, 1995) and that this has consequences for in vivo movement (Hoffer et al, 1992). Despite this evidence, in muscle modelling many investigators, who include effects of geometry in their models, choose to disregard this aspect (e.g., Stensen, 1667;Borelli, 1680;Pfuhl, 1937;Benninghoff and Rollhauser, 1952;Gans and Bock, 1965;Hatze, 1981;Huijing and Woittiez, 1984;Huijing and Woittiez, 1985;Pierrynowski and Morrison, 1985;Otten, 1988;Zajac, 1989;Spoor et al, 1991;Hawkins and Hull, 1991;van Leeuwen, 1992;Burkholder et al, 1994).…”

Section: Muscle Fibres Attached To Aponeuroses At Both Endsmentioning

confidence: 99%

“…Despite this evidence, in muscle modelling many investigators, who include effects of geometry in their models, choose to disregard this aspect (e.g., Stensen, 1667;Borelli, 1680;Pfuhl, 1937;Benninghoff and Rollhauser, 1952;Gans and Bock, 1965;Hatze, 1981;Huijing and Woittiez, 1984;Huijing and Woittiez, 1985;Pierrynowski and Morrison, 1985;Otten, 1988;Zajac, 1989;Spoor et al, 1991;Hawkins and Hull, 1991;van Leeuwen, 1992;Burkholder et al, 1994). It is clear that in many cases heuristic aims of modelling work lead to this attractive simplification, or it is thought that relative to the errors that will be made inevitably in modelling the effects of this simplification will be minor.…”

Section: Muscle Fibres Attached To Aponeuroses At Both Endsmentioning

confidence: 99%

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Parameter interdependence and success of skeletal muscle modelling

Huijing

1995

Human Movement Science

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In muscle and movement modelling it is almost invariably assumed that force actually exerted is determined by several independent factors. This review considers the fact that length force characteristics are not a relatively fixed property of muscle but should be considered the product of a substantial number of interacting factors. Level of activation and recruitment are influential factors in relation to aspects of muscle architecture. For the level of activation effects of its short term history (potentiation, fatigue in sustained contractions) have to be taken into account and are reviewed on the basis of recent experimental results as well as available literature. History is also an important determinant for the effect of length changes. This concept is introduced on the basis of recent experimental evidence as well as available literature. Regarding effects of muscle architecture, the concepts of primary and secondary distribution of fibre mean sarcomere length are introduced as well as effects of muscle geometry for mono-and bi-articular muscles on those distributions. Implications for motor control are discussed and the need for intramuscular coordination indicated.

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Fiber architecture of the extensors of the hindlimb in semiterrestrial and arboreal guenons

Anapol

Barry

1996

Am. J. Phys. Anthropol.

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Fiber architecture of the extensor musculature of the knee and ankle is examined in two African gueon species--the semiterrestrial Cercopithecus aethiops, and the arboreal C. ascanius. Using histologic and microscopic techniques to measure lengths of sarcomeres, the original lengths of muscle fasciculi and angles of pinnation in quadriceps femoris and triceps surae are reconstructed from direct measurements on cadavers. Calculations of reduced physiological cross-sectional area, mass/predicted effective tetanic tension, maximum excursion, and tendon length/fasciculus+tendon lengths are correlated to preferred locomotor modalities in the wild. For both species, greater morphological differences occur among the bellies of quadriceps femoris--rectus femoris, vastus intermedius, v. lateralis, and v. medialis--than among the bellies of triceps surae--gastrocnemius lateralis, g. medialis, plantaris, and soleus. With regard to quadriceps femoris, few differences occur between species. Interspecific differences in the triceps surae indicate (1) redirection of muscle force to accommodate arboreality in which the substrate is less than body width; (2) muscles more suited for velocity in the semiterrestrial vervets; and (3) muscles used more isotonically in vervets and more isometrically in red-tailed monkeys. The inherent flexibility of muscles may be preadaptive to a primary species shift in locomotor modality until the bony morphology is able to adapt through natural selection.

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Zur inneren Mechanik des gefiederten Muskels

Cited by 157 publications

References 2 publications

Muscle fiber angle, segment bulging and architectural gear ratio in segmented musculature

Muscle fiber angle, segment bulging and architectural gear ratio in segmented musculature

Parameter interdependence and success of skeletal muscle modelling

Fiber architecture of the extensors of the hindlimb in semiterrestrial and arboreal guenons

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