While it is known that musculotendon units adapt to their load environments, there is only a limited understanding of tendon adaptation in vivo. Here we develop a computational model of tendon remodeling based on the premise that mechanical damage and tenocyte-mediated tendon damage and repair processes modify the distribution of its collagen fiber lengths. We explain how these processes enable...

Compliance in jumping robots improves gait stability and enables energy-efficient locomotion. Here, 3D printable auxetic tubular springs from thermoplastic polyurethane (TPU) for rapid sustainable hopping are developed. Because the have negative Poisson's ratios, they become stiffer as compression proceeds theoretically stores 35.2% more energy than a linear spring with same stiffness. As stres...

background lesions in peripheral nerves are highly prevalent in the upper extremity. the present study compares different tendon transfer surgeries in patients with radial nerve palsy. methods fifty patients with radial nerve palsy were randomly selected among patients who referred to tehran 15th khordad hospital during 2006-2011. they were divided into two groups of 17 and 33 subjects. single ...

Traditionally, most of the nonlinear control techniques for elastic robotic systems focused on achieving a desired closed-loop behavior by modifying heavily intrinsic properties plant. This is also case tendon-driven systems, where highly couplings lead to several challenges. Following current philosophy exploiting mechanical compliance rather than fighting it, this letter proposes an Elastic S...

INTRODUCTION Despite the high prevalence of tendon injuries, the etiology of tendon rupture is poorly understood. Degeneration due to cumulative microtrauma resulting from overuse has been widely discussed as a major contributor to tendon failure. However, existing biomechanical models of fatigue have largely focused on the relationship between the applied stress and the number of cycles to fai...

INTRODUCTION Tendons establish specific connections between muscles and the skeleton by transferring contraction forces from skeletal muscle to bone thereby allowing body movement. Tendon physiology and pathology are heavily dependent on mechanical stimuli. Tendon injuries clinically represent a serious and still unresolved problem since damaged tendon tissues heal very slowly and no surgical t...

This work is devoted to the development of mechatronic hand that can be used as prosthetic hand and as grasper for humanoid robot. The structure and kinematics of the construction, physical appearance, the principle of fingers flexion were inspired byhumanhand.In order to analyze flexing principle, direct kinematics task and force analysis had defined. This study has allowed define more precise...

Cardiac ablation therapy is an effective minimally invasive treatment of cardiac arrhythmias. The procedure is delicate and complex in nature requiring particular sections of the heart to be ablated. When operated by an experienced electrophysiologist, the procedure normally takes 2 to 3 hours. It is often conducted under fluoroscopic X-ray guidance and longer procedure times can increase the r...

An exosuit is a wearable robot that assists the muscular strength of human wears it by using multiple wires with similar functions to muscles. This study focuses on development series elastic tendon actuator (SETA) for actuation an exosuit. A gait analysis was performed walking stairs deduce design requirements SETA, and necessary performances were then determined based these requirements. The ...

Aerial continuum manipulation systems (ACMSs) were newly introduced by integrating a robot (CR) into an aerial vehicle to address few issues of conventional such as safety, dexterity, flexibility and compatibility with objects. Despite the earlier work on decoupled dynamic modeling ACMSs, their coupled still remains intact. Nonlinearity complexity CR make it difficult design ACMS model suitable...