Supraglenoid tubercle = a structural feature on the scapula, which is also known as the "shoulder blade" or "shoulder bone". |
Location of supraglenoid tubercle:
The location on the left scapula bone of the supraglenoid tubercle is indicated in the labelled diagrams of the scapula on the right (lateral view of scapula bone) and below (posterior and anterior views of scapula bone). The position of the supraglenoid tubercle can be described in words as "immediately above, i.e. at the apex of, the glenoid cavity". Another way to say "above" the glenoid cavity is to say "superior to" the glenoid cavity - different texts may use slightly different words.
About the supraglenoid tubercle:
The supraglenoid tubercle itself is a slightly raised - so one could say "protruding" surface or "projection" of bone.
Recall from general knowledge of the features and markings on bones that a tubercle is typically a small tuberosity, i.e. projection, that may also be described as a round nodule or warty outgrowth.
In general "processes" and "projections" on bones are often surfaces to which connective tissues e.g. ligaments and tendons are attached.
In the case of the supraglenoid tubercle the attachment is to the long head of the Biceps Brachii muscle of the upper-arm. So, remember that:
The supraglenoid tubercle is the part of the scapula (bone) to which the long head of the biceps brachii (muscle) attaches. |
Where does the term "supraglenoid tubercle" come from ?
- "Supraglenoid" comes from the Latin "supra" meaning above and "glenoid" meaning socket or cavity.
- "Tubercle" is also from Latin, in this case "tuber" meaning lump, in combination with the ending used to indicate "small", i.e. a small lump.
In the past medical students were expected to have a good background in Latin (language) - it is easy to appreciate how this was helpful.
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