Supraglenoid tubercle | |
---|---|
![]() Left scapula. Lateral view. Supraglenoid tubercle labeled in red. | |
![]() Bones of left shoulder. Supraglenoid tubercle shown in red. | |
Details | |
Identifiers | |
Latin | tuberculum supraglenoidale |
TA98 | A02.4.01.020 |
TA2 | 1163 |
FMA | 23263 |
Anatomical terms of bone |
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]
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]
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]
This article incorporates text in the public domain from page 205 of the 20th edition of Gray's Anatomy (1918)