What happens at the musculotendinous junction?
musculotendinous junction The connection between a muscle and its tendon. The junction contains muscle cells with sarcomere membranes, which are folded inwards in a complicated manner. The in-folding reduces the ability of the muscle cells to generate stress on the junction during a muscle action, possibly reducing the risk of tears.
What is a musculotendinous junction tendon tear?
Video 1 In this video, we introduce a classification and present typical cases illustrating the surgical options for supraspinatus tendon tears at the musculotendinous junction. A musculotendinous junction tear is classified as a type 1 tear if it is a primary tear, or a type 2 retear if it is secondary, occurring after prior rotator cuff repair.
What is the myotendinous junction?
Myotendinous junction (MTJ) is a part of the myotendinous unit, which connects muscle and tendon, and transmits forces between them.
What does musculotendinous mean?
musculotendinous adjective Referring to the muscles and tendons. Segen's Medical Dictionary. © 2012 Farlex, Inc.
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.
What is Musculotendinous unit?
Musculotendinous Unit. muscle, tendon, and fascia. Muscle.
What is a Musculotendinous injury?
Categories of Musculotendinous Injury Acute musculotendinous injuries involving the knee occur as the result of blunt direct trauma or secondary to indirect trauma from excessive tension.
What is supraspinatus Myotendinous Junction?
Supraspinatus myotendinous junction injuries are an uncommon type of rotator cuff tear that present with distinctive imaging findings. The pathophysiologic process of these lesions is conditioned by the anatomy and biomechanics of the supraspinatus muscle.
What is PEC and SEC?
The parallel elastic component (PEC), provided by the muscle membranes, supplies resistance when a muscle is passively stretched. The series elastic component (SEC), residing in the tendons, acts as a spring to store elastic energy when a tensed muscle is stretched.
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.
Can a muscle tear heal on its own?
Most muscle strains do not require surgery, and a full recovery is expected. If there is a partial tear then the athlete can return when they are pain free and have normal strength and motion. This usually occurs following anywhere from a few weeks to a few months of appropriate treatment and therapy.
How do I know if I pulled my groin or hip flexor?
Signs and symptoms of a hip flexor strain:Pain in the front of the hip or in the groin.Pain, tenderness, and weakness when walking or climbing stairs.Pain when lifting the knee toward the chest.Pulling sensation in the front of the hip or in the groin.Swelling and inflammation.Bruising.Muscle spasms.More items...
What causes musculoskeletal disorder?
“Thus there is an international near-consensus that musculoskeletal disorders are causally related to occupational ergonomic stressors, such as repetitive and stereotyped motions, forceful exertions, non-neutral postures, vibration, and combinations of these exposures.”
How does a supraspinatus tear occur?
Supraspinatus tear can be caused by lifting something too heavy, falling on your arm, or dislocating your shoulder. However, host cases are the result of the tendon wearing down over time, which is known as a degenerative tear.
Can rotator cuff tears be missed on MRI?
MRI missed 4 subscapularis and 3 supraspinatus tears. The sensitivity and specificity of MRI in diagnosing full thickness rotator cuff tears were 0.90 and 0.91, respectively. For labral tears, MRI and arthroscopy detected them in 16 and 31 patients, respectively.
What is the surgery for torn rotator cuff?
Surgical techniques that may be used to repair a tear of the rotator cuff include arthroscopy, open surgery, or a combination of both. The goal of rotator cuff repair surgery is to help restore the function and flexibility of the shoulder and to relieve the pain that can't be controlled by other treatments.