Infraspinatus: Difference between revisions
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A thick, triangular muscle; one of the 4 muscles which comprise the [[Rotator Cuff|Rotator Cuff]] of the shoulder. | A thick, triangular muscle; one of the 4 muscles which comprise the [[Rotator Cuff|Rotator Cuff]] of the shoulder. | ||
[[Image: | [[Image:Infraspinatus muscle back2.png|right|200px]] | ||
== 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]]. | 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's Anatomy of Human Body, Bartleby.com edition. New York: 2000.http://www.bartleby.com/107/123.html</ref> | ||
== Insertion == | == Insertion == | ||
The posterior aspect of greater tuberosity of humerus, and the capsule of shoulder joint. | The posterior aspect of greater tuberosity of humerus, and the capsule of shoulder joint.<ref name="2">http://www.wheelessonline.com/ortho/infraspinatus</ref> | ||
== Nerve Supply == | == Nerve Supply == | ||
Suprascapular Nerve | Suprascapular Nerve (C5 & C6)<ref name="3">http://www.anatomyexpert.com/structure_detail/5510/</ref> | ||
== Blood Supply == | == Blood Supply == | ||
Suprascapular and circumflex scapular arteries. | Suprascapular and circumflex scapular arteries.<ref name="3" /> | ||
== Action == | == Action == | ||
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It assists in producing shoulder extension. | It assists in producing shoulder extension. | ||
With the arm fixed, it abducts the inferior angle of the scapula. | With the arm fixed, it abducts the inferior angle of the scapula. <ref name="2" /> | ||
== Function == | == Function == | ||
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It provides the primary muscle force for external rotation of the shoulder. | 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. | Along with the rest of the Rotator Cuff muscles it provides stability to the shoulder complex.<ref name="3" /> | ||
== Resources == | == Resources == | ||
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== Recent Related Research (from [http://www.ncbi.nlm.nih.gov/pubmed/ Pubmed]) == | == Recent Related Research (from [http://www.ncbi.nlm.nih.gov/pubmed/ Pubmed]) == | ||
<div class="researchbox"> | <div class="researchbox"> | ||
<rss> | <rss>http://www.ncbi.nlm.nih.gov/entrez/eutils/erss.cgi?rss_guid=1Zi2AdWYRHLCFqE2i13LpK0YIE9yHBdoHTyyJLMZfAZgJpmku7|charset=UTF-8|short|max=10</rss> | ||
</div> | </div> | ||
== References == | == References<br> == | ||
<references /> | <references /> | ||
Revision as of 05:10, 1 May 2015
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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