Anterior Scalene: Difference between revisions
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'''Original Editor '''- [[User:Wendy Walker|Wendy Walker]] | '''Original Editor ''' - [[User:Wendy Walker|Wendy Walker]] | ||
'''Lead Editors''' - {{Special:Contributors/{{FULLPAGENAME}}}} | '''Lead Editors''' - {{Special:Contributors/{{FULLPAGENAME}}}} | ||
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== Description == | == Description == | ||
Tha anterior scalene, AKA scalenus anterior (or even scalenus anticus) muscle is one of the lateral muscles of the neck, belonging to the scalene group. It is deeply placed, lying behind the [[Sternocleidomastoid|Sternocleidomastoid]]. | |||
It is located between the subclavian vein and the subclavian artery; the roots of the [[Brachial plexus|brachial plexus]] pass posterior to it; the phrenic nerve crosses its anterior surface.<br> | It is located between the subclavian vein and the subclavian artery; the roots of the [[Brachial plexus|brachial plexus]] pass posterior to it; the phrenic nerve crosses its anterior surface.<br> | ||
[[Image:Scalenus anterior - animation04.gif|center]]<br> | [[Image:Scalenus anterior - animation04.gif|center|300x300px]]<br> | ||
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== Origin == | == Origin == | ||
C3-6 | *C3-6 | ||
*Anterior tubercles of the transverse processes of the third, fourth, fifth, and sixth [[Cervical Vertebrae|cervical vertebrae.]] | |||
Anterior tubercles of the transverse processes of the third, fourth, fifth, and sixth [[Cervical Vertebrae|cervical vertebrae.]] | |||
== Insertion == | == Insertion == | ||
1st rib | *1st rib | ||
*By a narrow, flat tendon into the scalene tubercle on the inner border of the first rib, and into the ridge on the upper surface of the rib in front of the subclavian groove. | |||
By a narrow, flat tendon into the scalene tubercle on the inner border of the first rib, and into the ridge on the upper surface of the rib in front of the subclavian groove. | |||
== Nerve Supply == | == Nerve Supply == | ||
Brachial plexus, C5-7 | *Brachial plexus, C5-7 | ||
*Anterior branches of the Cervical nerves 5 to 7 | |||
Anterior branches of the Cervical nerves 5 to 7 | |||
== Blood Supply == | == Blood Supply == | ||
Ascending cervical branch of the inferior thyroid artery | *Ascending cervical branch of the inferior thyroid artery | ||
== Action == | == Action == | ||
Acts with[[Middle Scalene|Middle]] and [[Posterior Scalene|Posterior Scalenes]] | Acts with [[Middle Scalene|Middle]] and [[Posterior Scalene|Posterior Scalenes]] | ||
When the Scalenes act from above, they elevate the first and second ribs. | When the Scalenes act from above, they elevate the first and second ribs. | ||
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== References == | == References == | ||
<references /><br> | |||
<references /> | |||
[[Category:Cervical_Anatomy]][[Category:Anatomy]][[Category:Muscles]] | [[Category:Cervical Spine]] [[Category:Cervical_Anatomy]] [[Category:Anatomy]] [[Category:Muscles]] | ||
Revision as of 18:27, 2 April 2017
Original Editor - Wendy Walker
Lead Editors - Kim Jackson, Wendy Walker, Chrysolite Jyothi Kommu, Admin, Evan Thomas, WikiSysop and Milijana Delevic
Description[edit | edit source]
Tha anterior scalene, AKA scalenus anterior (or even scalenus anticus) muscle is one of the lateral muscles of the neck, belonging to the scalene group. It is deeply placed, lying behind the Sternocleidomastoid.
It is located between the subclavian vein and the subclavian artery; the roots of the brachial plexus pass posterior to it; the phrenic nerve crosses its anterior surface.
Origin[edit | edit source]
- C3-6
- Anterior tubercles of the transverse processes of the third, fourth, fifth, and sixth cervical vertebrae.
Insertion[edit | edit source]
- 1st rib
- By a narrow, flat tendon into the scalene tubercle on the inner border of the first rib, and into the ridge on the upper surface of the rib in front of the subclavian groove.
Nerve Supply[edit | edit source]
- Brachial plexus, C5-7
- Anterior branches of the Cervical nerves 5 to 7
Blood Supply[edit | edit source]
- Ascending cervical branch of the inferior thyroid artery
Action[edit | edit source]
Acts with Middle and Posterior Scalenes
When the Scalenes act from above, they elevate the first and second ribs.
Acting from below, they produce side flexion of the vertebral column; if the muscles of both sides act, the vertebral column is slightly flexed.
All 3 scalene muscles produce rotation of the cervical spine to the same side[1].
Function[edit | edit source]
When acting from above, they help to elevate the 1st rib and are accessory muscles of respiration.
Acting from below they are cervical flexors and rotators.
Resources[edit | edit source]
Recent Related Research (from Pubmed)[edit | edit source]
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References[edit | edit source]
- ↑ 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.
