Infraglenoid tubercle = a structural feature on the scapula, which is also known as the "shoulder blade" or "shoulder bone". |
Location of the infraglenoid tubercle:
The location on the left scapula bone of the infraglenoid tubercle is indicated in the labelled diagrams of the scapula shown on the right (lateral view of scapula bone) and below (posterior and anterior views of scapula bone). The position of the infraglenoid tubercle on the scapula bone can be described in words as "immediately below the glenoid cavity".
About the infraglenoid tubercle:
The infraglenoid tubercle itself is a protruding surface of bone whose surface has a rough texture and extends over a triangular area of approx. an inch (2.5 cm) in length in an average sized adult.
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 infraglenoid tubercle the attachment is to the long head of the Triceps Brachii muscle of the upper-arm. So, remember that:
The infraglenoid tubercle is the part of the scapula (bone) to which the long head of the triceps brachii (muscle) attaches. |
Where does the term "infraglenoid tubercle" come from ?
- "Infraglenoid" comes from the Latin word "infra" meaning below and the word "glenoid" meaning socket or cavity.
- "Tubercle" is also from a Latin word, in this case the word "tuber" meaning lump, in combination with the word 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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