Infraspinatus: Difference between revisions
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== Origin == | == Origin == | ||
The infraspinatus fossa of scapula, with some fibres arising from the infraspinatous fascia which covers the muscle and separates it from Teres Major and [[Teres Minor|Teres Minor]].<ref name="1">Gray | The infraspinatus fossa of scapula, with some fibres arising from the infraspinatous fascia which covers the muscle and separates it from Teres Major and [[Teres Minor|Teres Minor]].<ref name="1">Gray H. Anatomy of the Human Body. Philadelphia: Lea & Febiger, 1918. Available from www.bartleby.com/107/ (accessed on 29/2/2016)</ref> | ||
== Insertion == | == Insertion == | ||
Revision as of 21:48, 29 February 2016
Original Editor - Wendy Walker
Lead Editors - Kate Sampson, Kim Jackson, Wendy Walker, Lilian Ashraf, 127.0.0.1, Oyemi Sillo, WikiSysop, Aya Alhindi, Naomi O'Reilly and George Prudden
Description[edit | edit source]
A thick, triangular muscle; one of the 4 muscles which comprise the Rotator Cuff of the shoulder.
Origin[edit | edit source]
The infraspinatus fossa of scapula, with some fibres arising from the infraspinatous fascia which covers the muscle and separates it from Teres Major and Teres Minor.Cite error: Invalid <ref> tag; name cannot be a simple integer. Use a descriptive title
Insertion[edit | edit source]
The posterior aspect of greater tuberosity of humerus, and the capsule of shoulder joint.Cite error: Invalid <ref> tag; name cannot be a simple integer. Use a descriptive title
Nerve Supply[edit | edit source]
Suprascapular Nerve (C5 & C6)Cite error: Invalid <ref> tag; name cannot be a simple integer. Use a descriptive title
Blood Supply[edit | edit source]
Suprascapular and circumflex scapular arteries.Cite error: Invalid <ref> tag; name cannot be a simple integer. Use a descriptive title
Action[edit | edit source]
Infraspinatus is the main external rotator of the shoulder joint.
It assists in producing shoulder extension.
With the arm fixed, it abducts the inferior angle of the scapula. Cite error: Invalid <ref> tag; name cannot be a simple integer. Use a descriptive title
Function[edit | edit source]
It provides the primary muscle force for external rotation of the shoulder.
Along with the rest of the Rotator Cuff muscles it provides stability to the shoulder complex.Cite error: Invalid <ref> tag; name cannot be a simple integer. Use a descriptive title
Resources[edit | edit source]
Recent Related Research (from Pubmed)[edit | edit source]
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References
[edit | edit source]
- ↑ KenHub. Infraspinatus Muscle - Attachments &amp; Action/Function. Available from: https://www.youtube.com/watch?v=rdwyUrDQoUg (last accessed 29/2/2016)
