VARIATION OF MUSCLE LENGTH AND SARCOMERE LENGTH DURING POSTNATAL GROWTH IN MICE
نویسندگان
چکیده
منابع مشابه
Sarcomere length during post-natal growth of mammalian muscle fibres.
The length of the sarcomeres, the Aand the I-filaments and their percentage overlap were measured in the fibres of the biceps brachii muscle from mice of different ages. The sarcomere length with the limb in the fully extended position was found to increase from 2-3 fi in the newborn animal to 2-8 fi in the adult. This increase was due to a decrease in the percentage overlap of the filaments an...
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PURPOSE To compare single-site intraoperative sarcomere length values with sarcomere lengths measured from systematic sampling of the entire transferred muscle. METHODS The tendon of the rabbit second toe extensor muscle was transposed to the ankle extensor retinaculum under levels of stretch over the sarcomere length range of about 2.5 microm to about 4.0 microm. Intraoperative sarcomere len...
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The lengths of the sarcomeric thin filaments vary in a skeletal muscle-specific manner and help specify the physiological properties of skeletal muscle. Since the extent of overlap between the thin and thick filaments determines the amount of contractile force that a sarcomere can actively produce, thin filament lengths are accurate predictors of muscle-specific sarcomere length-tension relatio...
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This study was undertaken to determine the impact of sarcomere length (SL) on the level of cooperative activation of the cardiac myofilament at physiological [Mg2+]. Active force development was measured in skinned rat cardiac trabeculae as a function of free [Ca2+] at five SLs (1.85-2.25 microm; 1 mM free [Mg2+]; 15 degrees C). Only muscle preparations with minimal force rundown during the ent...
متن کاملQuantification of sarcomere length distribution in whole muscle frozen sections.
Laser diffraction (LD) is a valuable tool for measuring sarcomere length (Ls), a major determinant of muscle function. However, this method relies on few measurements per sample that are often extrapolated to whole muscle properties. Currently it is not possible to measure Ls throughout an entire muscle and determine how Ls varies at this scale. To address this issue, we developed an actuated L...
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ژورنال
عنوان ژورنال: Japanese Journal of Physical Fitness and Sports Medicine
سال: 1983
ISSN: 0039-906X,1881-4751
DOI: 10.7600/jspfsm1949.32.134