Sternocleidomastoid: Difference between revisions
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== | == Description == | ||
Sternocleidomastoid (SCM)is a paired superficial muscle in the anterior portion of the neck. Carotid sheath structures lie deep to it. | |||
== | == Origin == | ||
SCM origins from 2 heads as follows: Sternal head: anterior surface of the manubrium Clavicular head: medial 1/3rd of the clavicle | |||
== | == Insertion == | ||
Mastoid process and lateral 1/2 of the superior nuchal line | |||
== | == Nerve Supply == | ||
*http://www.spineuniverse.com/anatomy | Spinal accessory nerve (XI), with sensory supply from C2 & C3 (for proprioception) | ||
== Blood Supply == | |||
Sternocleidomastoid branch of the Occipital artery | |||
== Action == | |||
Draws the mastoid process down toward the same side which causes the chin to turn up toward the opposite side; acting together, the muscles of the two sides flex the neck | |||
== Function == | |||
Rotation of the head to the opposite side or obliquely rotate the head. It also flexes the neck. When acting together it flexes the neck and extends the head. When acting alone it rotates to the opposite side (contralaterally) and slightly (laterally) flexes to the same side. It also acts as an accessory muscle of inspiration. | |||
== Resources == | |||
*http://www.spineuniverse.com/anatomy | |||
*http://anatomy.uams.edu/anatomyhtml/ | *http://anatomy.uams.edu/anatomyhtml/ | ||
== 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"><rss>http://www.ncbi.nlm.nih.gov/entrez/eutils/erss.cgi?rss_guid=1D73V0aa8O8bK8kEFXEiONRHebiObhe7pG7xRb2b4qyUwGmgfa|charset=UTF-8|short|max=10</rss> </div> | |||
== References == | |||
References will automatically be added here, see [[Adding References|adding references tutorial]]. | References will automatically be added here, see [[Adding References|adding references tutorial]]. | ||
<references /> | <references /> | ||
Revision as of 16:40, 20 January 2014
Original Editor - Your name will be added here if you created the original content for this page.
Lead Editors - Venus Pagare, Admin, Kim Jackson, Joao Costa, Daniele Barilla, WikiSysop, Joshua Samuel, Evan Thomas, Oyemi Sillo, Tarina van der Stockt and Lucinda hampton
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Description[edit | edit source]
Sternocleidomastoid (SCM)is a paired superficial muscle in the anterior portion of the neck. Carotid sheath structures lie deep to it.
Origin[edit | edit source]
SCM origins from 2 heads as follows: Sternal head: anterior surface of the manubrium Clavicular head: medial 1/3rd of the clavicle
Insertion[edit | edit source]
Mastoid process and lateral 1/2 of the superior nuchal line
Nerve Supply[edit | edit source]
Spinal accessory nerve (XI), with sensory supply from C2 & C3 (for proprioception)
Blood Supply[edit | edit source]
Sternocleidomastoid branch of the Occipital artery
Action[edit | edit source]
Draws the mastoid process down toward the same side which causes the chin to turn up toward the opposite side; acting together, the muscles of the two sides flex the neck
Function[edit | edit source]
Rotation of the head to the opposite side or obliquely rotate the head. It also flexes the neck. When acting together it flexes the neck and extends the head. When acting alone it rotates to the opposite side (contralaterally) and slightly (laterally) flexes to the same side. It also acts as an accessory muscle of inspiration.
Resources[edit | edit source]
Recent Related Research (from Pubmed)[edit | edit source]
References[edit | edit source]
References will automatically be added here, see adding references tutorial.
<references />
