Nonuniform volume changes during muscle contraction
نویسندگان
چکیده
منابع مشابه
Volume change and pressure development in muscle during contraction.
Volume change and pressure development in muscle during contraction. 1967.-Volume changes recorded in isometric and isotonic twitches of gastrocnemius muscle are similar to those recorded in sartorius muscle. The major differences are the greater difficulty in approaching isometric recording conditions in the gastrocnemius muscle and the possibility that a portion of the volume change could be ...
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Muscle is a three dimensional (3D) entity with varying shape across the length of the muscle and changes shape during contraction. Changes in muscle shape can influence the orientation of the fascicles within the muscle [1]. Dissection studies examining 3D muscle fascicles architecture have reported regional variations in the fascicle architecture [2]. 2D ultrasound studies have shown that the ...
متن کاملMuscle Volume Changes
Measurements have been made of the volume changes accompanying single isometric and isotonic twitches of frog sartorius muscle. The volume change consists of a rapid increase, a subsequent decrease, and a return to the initial volume; the order of magnitude of increase and decrease is 10(-5) cc/g of muscle. This volume change is length-dependent: the initial increase becomes more pronounced as ...
متن کاملChanges in Extraocular Muscle Volume During Ocular Duction
PURPOSE It has been tacitly assumed that overall extraocular muscle (EOM) volume is conserved during contraction and relaxation, yet this assumption has been untested up to now. We used high-resolution magnetic resonance imaging (MRI) to determine if total EOM volume changes during relaxation and contraction. METHODS Surface coil MRI in quasi-coronal planes was obtained in target-controlled, ...
متن کاملEffect of nonuniform muscle contraction on sustainability and frequency of triggered arrhythmias in rat cardiac muscle.
BACKGROUND Arrhythmias are benign or lethal, depending on their sustainability and frequency. To determine why lethal arrhythmias are prone to occur in diseased hearts, usually characterized by nonuniform muscle contraction, we investigated the effect of nonuniformity on sustainability and frequency of triggered arrhythmias. METHODS AND RESULTS Force, membrane potential, and intracellular Ca(...
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ژورنال
عنوان ژورنال: Biophysical Journal
سال: 1991
ISSN: 0006-3495
DOI: 10.1016/s0006-3495(91)82306-2