Journal ArticleDOI
Biphasic development of muscle fibers in the fetal lamb.
TLDR
Prenatal development of muscle fibers was examined histochemically in the fetal lamb from 50–145 days of gestation, and it seems likely that the quantity of muscle contraction is not the major determining factor for the differentiation of these fiber types.About:
This article is published in Experimental Neurology.The article was published on 1972-11-01. It has received 118 citations till now. The article focuses on the topics: Fiber & Muscle contraction.read more
Citations
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OtherDOI
Motor Units: Anatomy, Physiology, and Functional Organization
TL;DR: The sections in this article are: Motor Unit Types: Histochemical Profiles and Ultrastructural Correlations, Anatomical Considerations, and Control of Muscular Action: Recruitment and Rate Modulation.
Journal ArticleDOI
Roles for the integrin VLA-4 and its counter receptor VCAM-1 in myogenesis
Glenn D. Rosen,Joshua R. Sanes,Rhonda LaChance,Jeanette M. Cunningham,Jesse Roman,Douglas C. Dean +5 more
TL;DR: Evidence that an integrin (VLA-4) and its counter receptor (VCAM-1) have a role in secondary myogenesis is provided and patterns suggest that VLA-3-VCAM1 interactions influence alignment of secondary myoblasts along primary myotubes and/or the fusion of secondaryMyoblasts.
Journal Article
Muscle development in large and small pig fetuses.
P. M. C. Wigmore,N. C. Stickland +1 more
TL;DR: The results showed that the time of formation of primary and secondary fibres, and the numbers of primary fibres formed, were the same in both large and small littermates, but the number of secondary fibre formed was lower in the smaller fetuses and resulted in there being a 17% difference in total fibre number at birth.
Journal ArticleDOI
Myosin expression and specialization among the earliest muscle fibers of the developing avian limb.
TL;DR: It is suggested that the development of avian muscles be divided into two phases: an embryonic phase during which fibers of differing myosin content appear independently of innervation to become distributed in a specific topographic pattern within each muscle as it forms, followed by a fetal phase duringwhich innervation becomes essential for maintaining this pattern and modulating the myosIn content of its fibers.
Journal ArticleDOI
Myosin isozyme transitions occurring during the postnatal development of the rat soleus muscle
TL;DR: The myosin isozymes present in the developing rat soleus muscle from 1 week to 6 weeks after birth were investigated using biochemical and immunological methods to suggest that a preprogrammed sequence of myosins is embryonic----neonatal----adult fast.
References
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Journal ArticleDOI
Mammalian Motor Units: Physiological-Histochemical Correlation in Three Types in Cat Gastrocnemius
TL;DR: The correlation among a variety of physiological properties and the histochemical characteristics of muscle fibers belonging to single motor units in a mixed mammalian muscle is directly demonstrated.
Journal ArticleDOI
Dynamic properties of fast and slow skeletal muscles of the rat during development.
TL;DR: It will be shown that at any stage of development the ratio of the twitch contraction times of fast and slow muscles is approximately equal to the inverse ratio of their speeds of shortening, leading to the view that the duration of the active state is inversely proportional to the speed of longening of the contractile material.
Journal ArticleDOI
Histochemical composition, distribution of fibres and fatiguability of single motor units. Anterior tibial muscle of the rat.
L Edström,E Kugelberg +1 more
TL;DR: In this article, the effects of stimulation of single motor nerve fibres and contractions of a single motor unit were studied instead of the synchronized contractions in the whole muscle, which appeared to provide a picture of the histochemical composition and distribution of the fibres within the muscle.
Journal ArticleDOI
Differentiation of fast and slow muscles in the cat hind limb.
TL;DR: The present paper describes a detailed study of muscle differentiation as defined by various measurements of the speed of muscle contraction, and describes the effects of various nerve lesions on this differentiation.
Journal ArticleDOI
Histochemical, biochemical, and contractile properties of red, white, and intermediate fibers
TL;DR: The data demonstrate that in guinea pigs the soleus, which is composed entirely of intermediate fibers, is a slow-twitch muscle and has the lowest myosin and actomyosin ATPase activities.
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