J Korean Neurosurg Soc.  2012 Jan;51(1):44-46. 10.3340/jkns.2012.51.1.44.

The Unusual Origin of the Sternocleidomastoid Artery from the Lingual Artery

• Kim TH
• Chung SE
• Hwang YS
• Park SK

• KMID: 2190469
• DOI: http://doi.org/10.3340/jkns.2012.51.1.44

Abstract

The sternocleidomastoid (SCM) artery supplying blood to the SCM muscle has different origins according to its anatomical segment. The authors performed cadaveric neck dissection to review the surgical anatomy of neurovascular structures surrounding the carotid artery in the neck. During the dissection, an unusual finding was cited in which the SCM artery supplying the middle part of the SCM muscle originated from the lingual artery (LA); it was also noted that it crossed over the hypoglossal nerve (HN). There have been extremely rare reports citing the SCM artery originated from the LA. Though the elevation of the HN over the internal carotid artery was relatively high, the vascular loop crossing over the HN was very close to the carotid bifurcation. Special anatomical consideration is required to avoid the injury of the HN during carotid artery surgery.

Keyword

Lingual artery; Carotid artery surgery; SCM artery; Hypoglossal nerve

MeSH Terms

Arteries
Cadaver
Carotid Arteries
Carotid Artery, Internal
Crossing Over, Genetic
Hypoglossal Nerve
Muscles
Neck
Neck Dissection

Figure

• 

  Fig. 1 Right side of neck. The HN is hooked by the OA (black arrow) and the SCM artery (white arrow, narrow) arising from the LA (white arrow, wide). The superior thyroid artery (*) is located very close to the LA inferiorly. HN : hypoglossal nerve, SCM : sternocleidomastoid, LA : lingual artery.

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