Middle Scalene: Difference between revisions
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== Description == | == Description == | ||
Middle Scalene, AKA Scalenus Medius, is the largest and longest muscle in the Scalene group of lateral neck muscles. Often penetrated by the dorsal scapular and long thoracic nerves, it is deeply placed, lying behind Sternocleidomastoid.<br> | |||
[[Image:Scalenus_medius_muscle_-_animation02.gif]] | |||
== Origin == | |||
<div>C2 to C7</div><div>Posterior tubercles of the transverse processes of C2 to C7</div> | |||
== Insertion == | == Insertion == | ||
1st Rib | |||
Superior surface of the 1st rib, posterior to the subclavian groove | |||
== Nerve Supply == | == Nerve Supply == | ||
Cervical nerves 5 to 3 & 4 | |||
== Blood Supply == | == Blood Supply == | ||
Mscular branches of the ascending cervical artery | |||
== Action == | == Action == | ||
Acting from above: elevation of 1st rib | |||
Acting from below: cervical side flexion and rotation<ref>J Orthop Sports Phys Ther. 2002 Oct;32(10):488-96. | |||
Actions of the scalene muscles for rotation of the cervical spine in macaque and human. | |||
Buford JA, Yoder SM, Heiss DG, Chidley JV.</ref>; if bilateral action, small degree of cervical flexion | |||
== Function == | == Function == | ||
Acting from above: accessory muscle of inspiration | |||
Acting from below: cervical side flexor and rotator | |||
== Resources == | == Resources == | ||
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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 /><br> | <references /><br> | ||
<br> | |||
[[Category:Cervical_Anatomy]] | |||
Revision as of 23:21, 21 January 2014
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Description[edit | edit source]
Middle Scalene, AKA Scalenus Medius, is the largest and longest muscle in the Scalene group of lateral neck muscles. Often penetrated by the dorsal scapular and long thoracic nerves, it is deeply placed, lying behind Sternocleidomastoid.
Origin[edit | edit source]
Insertion[edit | edit source]
1st Rib
Superior surface of the 1st rib, posterior to the subclavian groove
Nerve Supply[edit | edit source]
Cervical nerves 5 to 3 & 4
Blood Supply[edit | edit source]
Mscular branches of the ascending cervical artery
Action[edit | edit source]
Acting from above: elevation of 1st rib
Acting from below: cervical side flexion and rotation[1]; if bilateral action, small degree of cervical flexion
Function[edit | edit source]
Acting from above: accessory muscle of inspiration
Acting from below: cervical side flexor and rotator
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.
- ↑ J Orthop Sports Phys Ther. 2002 Oct;32(10):488-96. Actions of the scalene muscles for rotation of the cervical spine in macaque and human. Buford JA, Yoder SM, Heiss DG, Chidley JV.
