What is the function of the musculotendinous junction?
The musculotendinous junction (MTJ), and the point at which the tendon attaches to the bone, are also known as the osteotendinous junction (OTJ). The tendon’s function is to transmit muscle forces to the bone, causing movement. Which of the following measures the magnitude of mechanical stress at the Musculotendinous Junction?
What is the structure of musculotendins?
The muscle tears are usually at the musculotendinous junction (MTJ), which is the junction between the muscle and the tendon. Abstract: What is the structure of musculotendins. The thoracoabdominal diaphragm, which separates the thoracic and abdominal cavities, is a composite musculotendinous structure.
What is the myotendinous junction?
The myotendinous junction (MTJ) is a complicated, specialized region at the muscle-tendon interface that serves as the primary source of force transmission. Muscle and tendon morphogenesis occurs in close spatial and temporal relationship, despite their different embryologic origins. What exactly is a Myotendinous Junction?
Can the musculotendinous junction of the pectoralis major muscle rupture be repaired?
Our aim here is to confirm that the rupture of the musculotendinous junction of the pectoralis major muscle is rare and difficult to deal, but the acute surgical treatment by inserting anchors into the humerus, and duplicating the suturing layers in multiple directions can give good results especially in athletes. 1. Introduction
How far is the musculotendinous junction?
What is the average level of the musculotendinous junction?
What were the two transverse lines drawn at the regional orthopaedic meeting?
Can an orthopaedic surgeon repair the Achilles musculotendinous junction?
Is a tendon repair proximal or anatomical?
Where is the Musculotendinous junction located?
The myotendinous junction (MTJ) is a complex specialized region located at the muscle-tendon interface that represents the primary site of force transmission. Despite their different embryologic origins, muscle and tendon morphogenesis occurs in close spatial and temporal association.
Where is the most common site for a tear in the Musculotendinous unit?
The biceps femoris was the most commonly injured musculotendinous unit, representing 25.1% of the injuries. Of those, 14.4% were in the MTJ, and 9.7% were in the muscle belly.
Why is the Musculotendinous junction the weakest area of the muscle?
The musculotendinous junction is the weak point in the entire contractile unit because it's where the two different tissue types (muscle and tendon) meet.
What is supraspinatus Myotendinous Junction?
Supraspinatus myotendinous junction injuries are uncommon at MRI. These lesions invariably involve the anterior bundle of the supraspinatus muscle and may occur with a concomitant insertional tendon tear. High-grade chronic injuries lead to selective atrophy and fatty infiltration of the anterior supraspinatus muscle.
Can you move your arm with a torn pec?
It can limit arm use, and may cause significant pain. If you have ruptured or torn your pectoralis major muscle in your chest, you may benefit from physical therapy (PT) to help you recover. You may experience pain, limited shoulder motion, and difficulty using your arm normally.
What is Musculotendinous?
musculotendinous (not comparable) Of or pertaining to both muscle and tendon tissue.
Can a Musculotendinous tear be repaired?
We propose a technique for repair of this type of tear using lateral-row anchors. In this technique, the torn tendon is freshened and sutures are passed through the medial part of the torn tendon. When it is fixed with lateral-row anchors, the tear is reduced and tendon-to-tendon healing is seen.
How painful is a ruptured tendon?
Severe and excruciating pain. Immediate bruising. Pain and discomfort that worsens with tendon use. A “crunchy” sound or feeling (crepitus) with tendon use.
How is tendon tear diagnosed?
During the physical exam, your doctor will inspect your lower leg for tenderness and swelling. Your doctor might be able to feel a gap in your tendon if it has ruptured completely. The doctor might ask you to kneel on a chair or lie on your stomach with your feet hanging over the end of the exam table.
Does a full thickness tear of the supraspinatus tendon require surgery?
Keep in mind that while even large partial tears of the supraspinatus can do well without surgery, massive, full-thickness tears of the supraspinatus occasionally require surgical intervention, especially in young, athletic patients.
What is a Myotendinous junction tear?
Myotendinous junction ruptures occur when a contracted muscle is subjected to a motion of forceful uncontrolled elongation during a phase of eccentric muscle contraction.
What is a Myotendinous Junction mean?
The myotendinous junction (MTJ) is the interface between muscle and tendon and where force is transmitted between the two tissues. It is also a common location for strain injuries in sports. Most of these can be prevented by heavy eccentric exercise.
How is a torn latissimus dorsi diagnosed?
If you tear your latissimus dorsi muscle, you may have the following symptoms in the affected area:Burning pain.Swelling.Stiffness.Discoloration of the skin (ecchymosis)Palpable mass on your muscle.
Can a Musculotendinous tear be repaired?
We propose a technique for repair of this type of tear using lateral-row anchors. In this technique, the torn tendon is freshened and sutures are passed through the medial part of the torn tendon. When it is fixed with lateral-row anchors, the tear is reduced and tendon-to-tendon healing is seen.
How do you know if you tore your latissimus dorsi?
When your latissimus dorsi is injured, you might feel pain in your low back, mid-to-upper back, along the base of your scapula, or in the back of the shoulder. You may even feel pain along the inside of the arm, all the way down to your fingers.
How common is a pectoral tear?
Injuries of the pectoralis major muscle are rare. Although the injury typically occurs while lifting weights, specifically while performing a bench press, it has also been known to occur in several other sports.
What is the function of myotendinous junction?
Myotendinous junction consists of interdigitating tendon fibers and terminal myocytes, creating finger-like projections which increase the contact area between a tendon and a muscle, and - as a result - disperse the energy of a contracting muscle, decreasing focal stress.
Which part of the myotendinous unit is the weakest link?
In a healthy adult, the myotendinous junction is the 'weakest link' of the myotendinous unit and therefore it is its most commonly injured part.
What is the MtJ?
Myotendinous junction (MTJ) is a part of the myotendinous unit, which connects muscle and tendon, and transmits forces between them.
How far is the musculotendinous junction?
Although they reported a wide anatomical variation, ranging from 0 to 11.75cm, they showed that the overall average distance was 5.51cm, with 70% of their subjects having a musculotendinous junction between 2.54cm and 7.62cm from the attachment to the calcaneus. [8] This is considerably lower than the level identified by the surgeons in our survey (where the average was 10.1cm). This suggests that orthopaedic surgeons consistently overestimate the level of the musculotendinous junction. This disparity is of concern as it may lead to misinterpretation of ultrasound reports that make reference to the musculotendinous junction.
What is the average level of the musculotendinous junction?
The average level at which the musculotendinous junction was identified was 10.1cm (Standard Deviation [SD] 3.9cm) above the calcaneal attachment, with the average for consultants slightly higher than SpRs, at 11.5cm and 8.8cm respectively. The average highest level at which people thought surgery would be beneficial was 8.7cm (SD 2.7cm), with little difference between consultants and SpRs (8.8cm compared to 8.6cm). This meant that overall, those that responded thought that the highest level at which a patient might benefit from surgery was on average 1.4cm (SD 1.4cm) below the level of the musculotendinous junction.
What were the two transverse lines drawn at the regional orthopaedic meeting?
They were asked to draw two transverse lines, the first identifying the musculotendinous junction, and the second marking the highest level at which they would consider a surgical repair. They were asked about their understanding of the term “musculotendinous junction”.
Can an orthopaedic surgeon repair the Achilles musculotendinous junction?
Although most surgeons stated that they would not operate on a rupture above the musculotendinous junction, almost all identified a point higher than this region as their highest point for repair. Particular care is advised if an ultrasound reports the location of any rupture relative to the musculotendinous junction.
Is a tendon repair proximal or anatomical?
It is interesting to note that the surgeons surveyed are prepared to consider operative repair more proximal than the anatomical musculotendinous junction. It would suggest that there is adequate quality tendon to repair proximally. This is despite the fact that the majority of respondents defined the musculotendinous junction as a level beyond which sutures would not hold.