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SLAP is an acronym for "Superior Labrum Anterior and Posterior". [1] SLAP lesions are commonly seen in overhead throwing athletes but middle-aged labor workers can also be affected, and they can be caused by chronic overuse or an acute stretch injury of the shoulder.
The most common labrum tears in Japan are in the posterior region, likely due to the customary practice of sitting on the floor. Posterior labrum tears in the Western world usually occur when a force drives the femoral head posteriorly which transfers shear and compressive forces to the posterior labrum. [4]
It is an injury of the anterior glenoid labrum of the shoulder. [4] When this happens, a pocket at the front of the glenoid forms that allows the humeral head to dislocate into it. It is an indication for surgery and often accompanied by a Hill-Sachs lesion, damage to the posterior humeral head. [5]
Although posterior dislocation is much less common, instability following it is no less challenging and, again, some form of bone augmentation may be required to control instability. [32] Damaged ligaments, including labral tears, occurring as a result of posterior dislocations may be treated arthroscopically. [citation needed]
The labrum is a ring of cartilage on the rim of a shallow socket in the scapula into which the head of the upper arm bone normally fits and rotates. [citation needed] Once the labrum has healed to the rim of the shoulder blade, it should see stress very gradually so that it can gather strength. It is important not to re-injure it while it is ...
The glenoid cartilage underneath the labrum in the glenohumeral (GH) joint is disrupted by glenolabral articular disruption. [5] The articulation of the humeral head inside the glenoid fossa of the scapula forms the GH joint itself, which is a synovial ball and socket joint.
A SLAP lesion (superior labrum, anterior to posterior) is a tear where the glenoid labrum meets the tendon of the long head of the biceps muscle. Symptoms include increased pain with overhead activity, popping or grinding, loss of strength, and trouble localizing a specific point of pain. [ 3 ]
MRI of shoulder after dislocation with Hill–Sachs lesion and labral Bankart's lesion Hill–Sachs lesion post-shoulder dislocation X-ray at left shows anterior dislocation in a young man after trying to get up from his bed.