پاورپوینت انالیز شانه و حرکات (pptx) 25 اسلاید

دسته بندی : پاورپوینت

نوع فایل : PowerPoint (.pptx) ( قابل ویرایش و آماده پرینت )

تعداد اسلاید: 25 اسلاید

قسمتی از متن PowerPoint (.pptx) :

Muscular Analysis of Movement Chapter 14, pp.260-264 Chapter 17 Simple Joint System System Level Function Force & torque production for joint mobility and stability through rotation and translation of bones (segments) Muscle Actions Muscle Coordination (Synergy) Related Terminology muscle action – the development of tension (force) by a muscle functional muscle group – a group of muscles that are capable of causing a specific joint action (e.g., wrist radial deviators) motive force (or torque) – force causing the observed movement resistive force (or torque) – force opposing the observed movement Types of Muscle Actions Concentric Eccentric Isometric Concentric Shortens to cause movement Rotational movement Mechanically: Net Muscle (Motive) Torque > Net Resistive Torque Eccentric Lengthens to resist, control, or slow down movement Rotational movement Mechanically: Net Muscle (Resistive) Torque < Net Motive Torque Isometric Stays the same so that bone will stay fixed No movement Mechanically: Net Muscle Torque = Other Torque Total Net Torque = 0 System Level: Muscle Actions Resulting motion dependent on all torques acting about the joint (net torque) Isometric? Eccentric? Conditions for concentric?