Journal ArticleDOI
Dynamic properties of mammalian skeletal muscles.
TLDR
The author examines the relationship between ATPase activity of myosin and intrinsic speed of shortening, and the effects of nerve cross-union on properties of myOSin.Abstract:
Introduction. ............................................................ 129 Fiber Types. ............................................................ 130 Historical introduction. ................................................. 130 Classification and terminology. ........................................... 131 Contractile properties of different types of fiber. ............................ 134 Mechanical Properties. .................................................... 138 Introduction ........................................................... 138 Series-elastic component. ................................................ 138 Length : tension relation of contractile material. ............................. 140 Force: velocity properties of contractile component. ......................... 145 Behavior of series-elastic and contractile components in isotonic and isometric contractions ....................................................... 147 Active state, time course of isometric twitch, and posttetanic potentiation ....... 149 Ontogenetic Differentiation of Fast and Slow Muscles. ......................... 161 Growth ............................................................... 161 Dynamic properties. .................................................... 163 Other developmental changes. .......................................... 166 Kelation Between Size and Speed of Contraction .............................. 166 Speed of contraction of homologous muscles of different species. ............. 166 Speed of contraction of different muscles of same animal. .................... 169 Neural Control of Dynamic Properties. ...................................... 170 Introductiorl ........................................................... 170 Dynamic properties of normal and cross-innervated muscles .................. 172 Effects of nerve cross-union on properties of myosin. ......................... 175 Neural influences on noncontractile structures in muscle cells ................. 176 Correlations Between Dynamic and Chemical Properties of Contractile Material. .. 177 Introduction ........................................................... 177 Structure of myosin. .................................................... 177 Relation between ATPase activity of myosin and intrinsic speed of shortening . 181 Functional differences between fast and slow muscles. ....................... 182 Review of Some Major Problems ........................................... 183read more
Citations
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Journal ArticleDOI
Fiber types in mammalian skeletal muscles.
TL;DR: Mammalian skeletal muscle comprises different fiber types, whose identity is first established during embryonic development by intrinsic myogenic control mechanisms and is later modulated by neural and hormonal factors.
Journal ArticleDOI
The spring mass model for running and hopping
TL;DR: The model predicts the mass specific energy fluctuations of the center of mass per distance to be similar for runners and hoppers and similar to empirical data obtained for animals of various size.
Journal ArticleDOI
Physiological types and histochemical profiles in motor units of the cat gastrocnemius.
TL;DR: Intracellular stimulation of individual motoneurones ensured functional isolation of the muscle units innervated by them in pentobarbitone‐anaesthetized cats.
Journal ArticleDOI
Functional and clinical significance of skeletal muscle architecture.
Richard L. Lieber,Jan Fridén +1 more
TL;DR: The basic architectural properties of human upper and lower extremity muscles are described and the ability of muscles to change their architecture in response to immobilization, eccentric exercise, and surgical tendon transfer is reviewed.
Journal ArticleDOI
Muscle fiber type composition of the rat hindlimb
Robert B. Armstrong,R. O. Phelps +1 more
TL;DR: Fiber-type mass data are compared with physiological and biochemical data for the muscles taken from previous studies, and it is demonstrated that these functional properties are closely related to the proportions of muscle mass composed of the various fiber types.
References
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Journal ArticleDOI
Muscle Fiber Types: How Many and What Kind?
TL;DR: The purpose of the present communication is to point out some of the problems involved in the classification of fibers and to add new information of value in the analysis of human biopsy material.
Journal ArticleDOI
ATPase Activity of Myosin Correlated with Speed of Muscle Shortening
TL;DR: A role for the ATPase activity of myosin in determining the speed of muscle contraction is suggested and the F-actin-binding ability of myOSin from various muscles was rather constant.
Journal ArticleDOI
The effects of length and stimulus rate on tension in the isometric cat soleus muscle
P. M. H. Rack,D. R. Westbury +1 more
TL;DR: By subdividing ventral roots and supplying stimulating pulses to different groups of motor units in rotation, smooth contractions of soleus could be obtained with low rates of stimulation.