Anatomical Relations
The infraspinatus fascia is attached to the border of the infraspinatus fossa and is loosely attached to the lower border of the spine of the scapula. It completely covers the infraspinatus muscle and is continuous superiorly with the supraspinatus fascia, inferiorly with the brachial fascia, and laterally with the deltoid fascia.
Related parts of the anatomy
Structure
The infraspinatus fascia is a dense fibrous membrane, which shares a thicken border with the deltoid fascia along the posterior border of the deltoid muscle. The infraspinatus fascia is so dense and thick that it must be removed during dissection in order to view the underlying muscle.
Function
Together with the supraspinatus fascia, the infraspinatus fascia forms a singular osseofibrous compartment for the supraspinatus and infraspinatus muscles.
The infraspinatus fascia gives an attachment for the infraspinatus muscle, in addition to the bony insertion and origin points. The large attachment area for the muscle increases the effectiveness and efficiency of its action (Standring, 2016).
References
Standring, S. (2016) Gray's Anatomy: The Anatomical Basis of Clinical Practice. Gray's Anatomy Series 41st edn.: Elsevier Limited.
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Fascia
A fascia is a connective tissue that surrounds muscles, groups of muscles, blood vessels, and nerves.
