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Supraglenoid tubercle

Region of the scapula from which the long head of the biceps brachii muscle originates From Wikipedia, the free encyclopedia

Supraglenoid tubercle
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The supraglenoid tubercle is a region of the scapula from which the long head of the biceps brachii muscle originates.[1][2] It is a small, rough projection superior to the glenoid cavity near the base of the coracoid process. The term supraglenoid is from the Latin supra, meaning above, and glenoid, meaning socket or cavity.[3]

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Clinical relevance

Biceps tendonitis

Biceps tendonitis originates on the long head of the biceps brachii at the supraglenoid tubercle in 30% of cases. The main symptom is generally anterior biceps instability, but the disease can also be characterized by chronic anterior shoulder pain which radiates towards the lateral part of the elbow.[4] In cases of biceps tendinitis, steroids can be injected fluoroscopically at the supraglenoid tubercle to reduce pain associated with the pathology.[5]

Avulsion

The supraglenoid tubercle ossifies separately from the rest of the scapula, so may not be as strong as the rest of the bone. It can be pulled off (avulsed),[6] often after an excessively strong contraction of the biceps brachii.[7] This may also cause a fracture of the surrounding parts of the scapula, particularly the glenoid cavity.[8] This may also occur in horses.[9] This type of bone fracture is quite rare.[10]

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See also

References

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