Scalenus posterior

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Scalenus posterior
Position of scalenus posterior (shown in red).
The anterior vertebral muscles (scalenus posterior visible at bottom right).
Latin Musculus scalenus posterior
Gray's p.396
Origin Transverse processes of C4, C5 and C6
Insertion    Second rib
Artery Ascending cervical artery and superficial cervical artery.
Nerve C6, C7 and C8,
Actions Elevate second rib, tilt the neck to the same side

The Scalenus posterior (scalenus posticus), the smallest and most deeply seated of the three scalene muscles, arises, by two or three separate tendons, from the posterior tubercles of the transverse processes of the lower two or three cervical vertebrae, and is inserted by a thin tendon into the outer surface of the second rib, behind the attachment of the scalenus anterior.

It is occasionally blended with the scalenus medius.

Additional images

  • Position of scalenus posterior (shown in red). Animation.

  • Close up.

  • Still image.

  • Second rib.

  • Posterior scalene muscle

  • Scalenus posterior

  • Scalenus posterior

  • Scalenus posterior

  • Brachial plexus.Deep dissection.

  • Brachial plexus.Deep dissection.Anterolateral view

See also

References

This article incorporates text from a public domain edition of Gray's Anatomy.

External links

Wikimedia Commons has media related to Scalenus posterior.
Cervical

CN VII (superficial, PC): platysma
CN XI (deep): sternocleidomastoid

C1–C6 (anterior): Prevertebral muscles: longus (capitis, colli)

C3–C8 (lateral): scalene (anterior, medius, posterior)
Suboccipital

C1: rectus capitis posterior (major, minor) · obliquus capitis (inferior, superior)

C1–C6 (anterior): Prevertebral muscles: rectus capitis (anterior, lateralis)
Suprahyoid
Infrahyoid/strap
Fasciae
Pharynx
Larynx

M: MUS, DF+DRCT

anat (h/n, u, t/d, a/p, l)/phys/devp/hist

noco (m, s, c)/cong (d)/tumr, sysi/epon, injr

proc, drug (M1A/3)

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