Levator Scapulae: Difference between revisions
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== Description | == Description == | ||
Levator scapulae connects the upper limb to the vertebral column and lies in the posterior triangle of the neck. | Levator scapulae connects the upper limb to the vertebral column and lies in the posterior triangle of the neck. The superior aspect of the levator scapulae is covered by [[sternocleidomastoid]], and its inferior part by [[trapezius]]. | ||
The superior aspect of the levator scapulae is covered by [[sternocleidomastoid]], and its inferior part by [[trapezius]]. | |||
[[Image:Levator scapulae muscle animation small2.gif|center]] | [[Image:Levator scapulae muscle animation small2.gif|center]] | ||
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== Origin == | == Origin == | ||
The levator scapulae originates on the | The levator scapulae originates on the posterior tubercle of transverse process of [[Cervical Vertebrae|cervical vertebrae]] 1 to 4.<ref name="p1">http://www.anatomyexpert.com/structure_detail/5502/</ref> | ||
== Insertion == | == Insertion == | ||
The levator scapulae inserts on to the vertebral margin of the [[scapula]] between the superior angle and the root of the spine.<ref name="p2">http://www.wheelessonline.com/ortho/levator_scapula</ref> | |||
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== Nerve Supply == | == Nerve Supply == | ||
The levator scapulae is innervated by cervical nerve (C3-C4) and dorsal scapular nerve (C5).<ref name="p3">http://www.bartleby.com/107/121.html</ref> | |||
== Blood Supply == | == Blood Supply == | ||
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Descending scapular artery<ref name="p4">Joseph P Iannotti, Richard Parker.fckLRThe Netter Collection of Medical Illustrations: Musculoskeletal System, Volume 6, Part I - Upper Limb. Elsevier Health Sciences. 2012</ref> | Descending scapular artery<ref name="p4">Joseph P Iannotti, Richard Parker.fckLRThe Netter Collection of Medical Illustrations: Musculoskeletal System, Volume 6, Part I - Upper Limb. Elsevier Health Sciences. 2012</ref> | ||
== | == Function == | ||
The levator scapulae elevates and rotates the scapula.<ref name="p1" /> The levator scapulae elevates and rotates the inferior angle medially, when the spine is fixed. When the unilateral shoulder is fixed the levator scapulae rotates the scapulae to the same side and flexes the spine laterally. When bilateral shoulders are fixed the levator scapulae co-contract equally causing a gross flexion/extension of the cervical spine. | |||
== | == Clinical Relevance == | ||
== Assessment == | |||
== Treatment == | |||
== References == | == References == | ||
Revision as of 20:32, 4 July 2018
Original Editor - Wendy Walker
Lead Editors - Eric Henderson, SULEIMAN USMAN, Kim Jackson, Lucinda hampton, Admin, Wendy Walker, WikiSysop, Evan Thomas, Oyemi Sillo, Tarina van der Stockt and Joao Costa
Description[edit | edit source]
Levator scapulae connects the upper limb to the vertebral column and lies in the posterior triangle of the neck. The superior aspect of the levator scapulae is covered by sternocleidomastoid, and its inferior part by trapezius.
Origin[edit | edit source]
The levator scapulae originates on the posterior tubercle of transverse process of cervical vertebrae 1 to 4.[1]
Insertion[edit | edit source]
The levator scapulae inserts on to the vertebral margin of the scapula between the superior angle and the root of the spine.[2]
Nerve Supply[edit | edit source]
The levator scapulae is innervated by cervical nerve (C3-C4) and dorsal scapular nerve (C5).[3]
Blood Supply[edit | edit source]
Descending scapular artery[4]
Function[edit | edit source]
The levator scapulae elevates and rotates the scapula.[1] The levator scapulae elevates and rotates the inferior angle medially, when the spine is fixed. When the unilateral shoulder is fixed the levator scapulae rotates the scapulae to the same side and flexes the spine laterally. When bilateral shoulders are fixed the levator scapulae co-contract equally causing a gross flexion/extension of the cervical spine.
Clinical Relevance[edit | edit source]
Assessment[edit | edit source]
Treatment[edit | edit source]
References[edit | edit source]
- ↑ 1.0 1.1 http://www.anatomyexpert.com/structure_detail/5502/
- ↑ http://www.wheelessonline.com/ortho/levator_scapula
- ↑ http://www.bartleby.com/107/121.html
- ↑ Joseph P Iannotti, Richard Parker.fckLRThe Netter Collection of Medical Illustrations: Musculoskeletal System, Volume 6, Part I - Upper Limb. Elsevier Health Sciences. 2012
