Supinator: Difference between revisions
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= Description [[Image:Supinator 2.png|border|right|200px]] = | = Description [[Image:Supinator 2.png|border|right|200px]] = | ||
Spinator is located in the posterior compartment of the forearm. It is the prime supinator of the forearm and has a broad origin from the ulna and humerus and extends down to the posterior surface of the proximal third of the radius. <ref name="Drake">Drake RL, Vogl W, Mitchell AWM. Gray's anatomy for students. London: Churchill livingstone. 2005</ref><br> | Spinator is located in the posterior compartment of the forearm. It is the prime supinator of the forearm and has a broad origin from the ulna and humerus and extends down to the posterior surface of the proximal third of the radius. <ref name="Drake">Drake RL, Vogl W, Mitchell AWM. Gray's anatomy for students. London: Churchill livingstone. 2005</ref><br> | ||
= Anatomy = | = Anatomy = | ||
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=== Origin === | === Origin === | ||
- Lateral epicondyle of the humerus | - Lateral epicondyle of the humerus | ||
- Annular ligament | - Annular ligament | ||
- Supinator Cest fossa of the ulna <ref name="Martini" /> | - Supinator Cest fossa of the ulna <ref name="Martini" /> | ||
=== Insertion === | === Insertion === | ||
- Proximal third of the radius on the anterolateral surface, distal to the radial tuberosity. <ref name="Martini">Martini FH. Fundamentals of Anatomy and Physiology. Seventh Edition. Pearson Education Inc, 2006.</ref> | - Proximal third of the radius on the anterolateral surface, distal to the radial tuberosity. <ref name="Martini">Martini FH. Fundamentals of Anatomy and Physiology. Seventh Edition. Pearson Education Inc, 2006.</ref> | ||
=== Nerve supply === | === Nerve supply === | ||
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= Function = | = Function = | ||
Supinator supinates the forearm. It causes the distal end of the radius to move anterolaterally around the ulna, causing them to lie paralell <br> | |||
Supinator works with biceps brachii if powerful supination is required. However biceps brachii is unable to function to supinate when the elbow is extended<ref name="Palastanga" /> | Supinator works with biceps brachii if powerful supination is required. However biceps brachii is unable to function to supinate when the elbow is extended<ref name="Palastanga" /> | ||
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Place the patients arm in extension at the elbow and the forearm in midposition. Actively resist supination and palpate along the posterior part of the proximal third of the radius. <ref name="Palastanga" /> | Place the patients arm in extension at the elbow and the forearm in midposition. Actively resist supination and palpate along the posterior part of the proximal third of the radius. <ref name="Palastanga" /> | ||
= Resourses = | = Resourses = | ||
{{#ev:youtube|dZulELjSNUA}}<ref name="Kenhub">KenHub. Supinator muscle - Origin, Insertion, Innervation, Function & Definition- Human anatomy. Available from : https://www.youtube.com/watch?v=dZulELjSNUA (last accessed 6/2/2016)</ref> | {{#ev:youtube|dZulELjSNUA}}<ref name="Kenhub">KenHub. Supinator muscle - Origin, Insertion, Innervation, Function &amp; Definition- Human anatomy. Available from : https://www.youtube.com/watch?v=dZulELjSNUA (last accessed 6/2/2016)</ref><br> | ||
= References = | = References = | ||
Revision as of 20:11, 6 March 2016
Original Editor - Kate Sampson,
Top Contributors - Kate Sampson, Kim Jackson, Nina Myburg, 127.0.0.1 and Joao Costa;
Description 
[edit | edit source]
Spinator is located in the posterior compartment of the forearm. It is the prime supinator of the forearm and has a broad origin from the ulna and humerus and extends down to the posterior surface of the proximal third of the radius. [1]
Anatomy[edit | edit source]
Origin[edit | edit source]
- Lateral epicondyle of the humerus
- Annular ligament
- Supinator Cest fossa of the ulna [2]
Insertion[edit | edit source]
- Proximal third of the radius on the anterolateral surface, distal to the radial tuberosity. [2]
Nerve supply[edit | edit source]
Supinator is supplied by the posterior interosseous brach of the radial nerve (C5, C6) [3]
Function[edit | edit source]
Supinator supinates the forearm. It causes the distal end of the radius to move anterolaterally around the ulna, causing them to lie paralell
Supinator works with biceps brachii if powerful supination is required. However biceps brachii is unable to function to supinate when the elbow is extended[3]
Assessment[edit | edit source]
Palpation[edit | edit source]
Place the patients arm in extension at the elbow and the forearm in midposition. Actively resist supination and palpate along the posterior part of the proximal third of the radius. [3]
Resourses[edit | edit source]
References[edit | edit source]
- ↑ Drake RL, Vogl W, Mitchell AWM. Gray's anatomy for students. London: Churchill livingstone. 2005
- ↑ 2.0 2.1 Martini FH. Fundamentals of Anatomy and Physiology. Seventh Edition. Pearson Education Inc, 2006.
- ↑ 3.0 3.1 3.2 Palastanga N, Field D, Soames R. Anatomy and human movement. Structure and function. 5th ed. London: Butterworth Heinemann Elsevier, 2006
- ↑ KenHub. Supinator muscle - Origin, Insertion, Innervation, Function & Definition- Human anatomy. Available from : https://www.youtube.com/watch?v=dZulELjSNUA (last accessed 6/2/2016)
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