نتایج جستجو برای: muscle length
تعداد نتایج: 623503 فیلتر نتایج به سال:
مقدمه: سکته مغزی عامل ایجاد عوارض طولانی مدت در بیماران است. از مهمترین عوارض ناشی از سکته مغزی، کاهش تعادل در وضعیت ایستاده و در هنگام راه رفتن و ضعف عضلانی می باشد . هدف از این تحقیق بررسی تاثیر تمرینات ترکیبی ایزومتریک و ایزوتونیک بر تعادل ایستا و قدرت عضلانی (muscle test) بیماران سکته مغزی است. روش شناسی: این پژوهش از نوع نیمه تجربی بود. شرکت کنندگان در این تحقیق را 30 بیمار مرد مبتلا به ...
the aim of this study was to investigate anthropometric and physiological characteristics in junior volleyball players for talent identification according to their volleyball playing positions. 15 junior national volleyball players (mean age 17.7±0.3 years) participated in this study. players were classified to five groups according to their playing positions: setters, liberoes, middle blockers...
This paper hypothesizes that average muscle length and minimum tendon strain govern muscle and tendon length adaptation in all situations. A model has been implemented to test this hypothesis, and simulations have been performed for normal development, bone lengthening, immobilization, and retinacular release experiments in young and adult animals. The simulation results predict that both muscl...
background hyperactivity of depressor septi nasi muscle leads to smiling deformity and nasal tip depression. lateral fascicles of this muscle help in widening the nostrils. the purpose of this study was to evaluate the relationship between the nasal length changes and the alar base and the alar flaring changes during smile. methods standard photographs are performed in the face and lateral view...
An important assumption in 2D numerical models of skeletal muscle contraction involves deformation in the third dimension of the included muscle section. The present paper studies the often used plane strain description. Therefore, 3D muscle surface deformation is measured from marker displacements during isometric contractions at various muscle lengths. Longitudinal strains at superficial musc...
This study tested the hypothesis that the ratio of changes in muscle fascicle and tendon length that occurs with joint movement scales linearly with the ratio of the slack lengths of the muscle fascicles and tendons. We compared the contribution of muscle fascicles to passive muscle-tendon lengthening in muscles with relatively short and long fascicles. Fifteen healthy adults participated in th...
• The inverse relation between force and velocity of shortening comprises one of the most fundamental properties of the contractile system of muscle.This force-velocity relation was first defined for skeletal muscle relative to one initial muscle length. Subsequently, Abbott and Willcie demonstrated that the same inverse relation applies at any instant during the course of contraction if modifi...
BACKGROUND Hyperactivity of depressor septi nasi muscle leads to smiling deformity and nasal tip depression. Lateral fascicles of this muscle help in widening the nostrils. The purpose of this study was to evaluate the relationship between the nasal length changes and the alar base and the alar flaring changes during smile. METHODS Standard photographs are performed in the face and lat...
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