Search results for "tendon"

Muscle‐tendon morphology and function following long‐term exposure to repeated and strenuous mechanical loading

2020

We mapped structural and functional characteristics of muscle‐tendon units in a population exposed to very long‐term routine overloading. Twenty‐eight military academy cadets (age: 21.00 ± 1.1 yrs; height: 176.1 ± 4.8 cm; mass: 73.8 ± 7.0 kg) exposed for over 24 months to repetitive overloading were profiled via ultrasonography with a senior subgroup of them (n = 11; age = 21.4 ± 1.0 yrs; height = 176.5 ± 4.8 cm; mass = 71.4 ± 6.6 kg) also tested while walking and marching on a treadmill. A group of eleven ethnicity‐ and aged‐matched civilians (age = 21.6 ± 0.7 yrs; height = 176.8 ± 4.3 cm; mass = 74.6 ± 5.6 kg) was also profiled and tested. Cadets and civilians exhibited similar morphology…

Achilles tendon viscoelastic properties and mechanical responses to a single bout of exercise

2014

Shoulder ultrasound: current concepts and future perspectives

2021

Ultrasonography is an established and effective imaging technique that can be used to evaluate articular and periarticular structures around the shoulder. It has been shown to be useful in a wide range of rotator cuff diseases (e.g. tendon tears, rotator cuff calcific tendinopathy and bursitis) as well as non-rotator cuff abnormalities (instability, synovial joint diseases and nerve entrapment syndrome). A scanning protocol is highly recommended to reduce the rate of operators’ errors by following a standardized scheme including a list of main structures. Shoulder ultrasound has several advantages: it is a relatively cheap and widely available technique, free from ionizing radiation, that c…

Multilevel functional surgery in adults with acquired spasticity of upper extremity

2004

The authors present their expertise in the treatment of acquired spasticity of the upper extremity in adults, illustrating the basics of modern functional surgery, which benefits from the achievements in bioengineering and information technology and new surgical techniques. Moreover close cooperation between the physical therapist and surgeon is essential in planning a new treatment scheme which, when possible, may successfully strengthen and optimize the function control of the remaining extremity, thus overriding the old concept of merely correcting the deformity. Results depend on proper scrutiny of the preoperative clinical and instrumental details on successful surgical accomplishment …

Analisi quantitativa del tessuto tendineo di ratto adulto allenato

2011

Jumper's Knee

2005

High-Frequency and Ultra-High Frequency Ultrasound: Musculoskeletal Imaging up to 70 MHz

2020

AbstractMusculoskeletal (MSK) ultrasound has well-established advantages, able to investigate very small structures with high resolution and a quick and real-time dynamic evaluation with the possibility of contralateral comparison. Thus ultrasound has kept its own almost exclusive fields of application in daily clinical practice, and it is considered the first-level imaging technique to assess tendons, bursae, and capsuloligamentous structures of small peripheral joints as well as peripheral nerves. Up to now, however, clinical MSK ultrasound imaging could not go beyond the first 1 to 2 cm under the skin, using high-frequency probes up to 18 to 20 MHz with spatial resolution just below mill…

Focal lesions of the Achilles tendon: real-time variation of lesion grading during ultrasound-guided platelet-concentrate injection.

2009

INTRODUCTION: Achillodynia (Achilles tendon pain) is a significant source of disability for many sport people. Achilles tendon (AT) tear is the third most frequent major tendon disruption after those of the rotator cuff and knee extensor mechanism. The incidence of the AT tears is 11–18% overall. Unlike acute AT tear, chronic tear diagnosis is more difficult to make particularly when the chronic tear involves the AT only partially. Over the last 10 years, real time ultrasound has been used increasingly to diagnose Achilles tendon tears, thanks to its ability to perform dynamic study, in passive and active muscle contraction. Furthermore, ultrasound-guided procedures are increasingly used fo…

Tendon length estimates are influenced by tracking location

2022

Abstract Purpose Measurement of medial gastrocnemius (MG) tendon length using ultrasonography (US) requires the muscle–tendon junction (MTJ) to be located. Previously, the MG MTJ has been tracked from different proximo-distal locations near the MTJ, which could influence estimates of tendon length change due to the different characteristics of the aponeurosis and tendon. We used US to evaluate the effect of tracking point location on MG MTJ displacement during maximal and submaximal (10, 20 and 30% of the non-injured maximal) isometric plantar flexion contractions. Methods Displacement behaviour of MTJ was tracked from (1) the exact MTJ; and (2) from an insertion point of a muscle fascicle …

Muscle-tendon mechanics and energetics during walking, running and jumping.

2012

In the human lower limb, muscles and tendon tend to interact in an efficient manner during common movements like walking, running and jumping. This pattern of interaction exploits the ability of muscles to produce forces efficiently at low shortening velocities, whilst tendons act as springs that help to store elastic energy during the contact phase, and return a large proportion of the energy in the pushoff phase. This pattern of muscletendon interaction can be disrupted in novel tasks or as a consequence of ageing or disease, resulting in a decrease in movement efficiency. peerReviewed