Scalene: Difference between revisions
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[[Category:Shoulder]][[Category:Anatomy]][[Category:Musculoskeletal/Orthopaedics|Orthopaedics]] | |||
Revision as of 22:08, 17 March 2014
Original Editor - Your name will be added here if you created the original content for this page.
Lead Editors - Ilona Malkauskaite, Andeela Hafeez, Vanessa Rhule, Kim Jackson, Joao Costa, 127.0.0.1, Oyemi Sillo, Naomi O'Reilly, Joshua Samuel, Venus Pagare, Lydia Xenou, George Prudden and WikiSysop
Description[edit | edit source]
Scalene are a group of three pairs of muscles in the lateral neck: scalenus anterior, scalenus medius and scalenus posterior. Sometimes a fourth muscle, the scalenus minimus is present behind the lower portion of the scalenus anterior. The brachial plexus and subclavian artery pass between the anterior and middle scalenes, while the subclavian vein and phrenic nerve pass anteriorly to the anterior scalene as the muscle crosses over the first rib.
Origin[edit | edit source]
- Scalenus Anterior: Anterior tubercles of the transverse processes of vertebrae C3-C6
- Scalenus Medius: Posterior tubercles of the transverse processes of vertebrae C2-C7
- Scalenus Posterior: Posterior tubercles of the transverse processes of vertebrae C5-C7
Insertion[edit | edit source]
- Scalenus Anterior: Scalene tubercle of the first rib
- Scalenus Medius: Upper surface of the first rib behind the subclavian artery
- Scalenus Posterior: Lateral surface of the second rib
Nerve Supply[edit | edit source]
- Scalenus Anterior: Brachial plexus, C5-C7
- Scalenus Medius: Brachial plexus, C3-C8
- Scalenus Posterior: Brachial plexus, C7-C8
Blood Supply[edit | edit source]
Ascending cervical artery, a branch of the Thyro-cervical trunk for all the 3 divisions of the Scalenus muscle.
Action[edit | edit source]
Flexes & rotates neck
Function[edit | edit source]
Elevates the first rib; flexes and laterally bends the neck
Resources[edit | edit source]
Recent Related Research (from Pubmed)[edit | edit source]
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References[edit | edit source]
References will automatically be added here, see adding references tutorial.
