Absence of Scalenus Anterior Muscle

Shinichiro Murakami, Kanji Horiuchi, Chugo Yamamoto, Aiji Ohtsuka, Takuro Murakami

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

A rare anomaly of the scalenus muscles is described. In this case, the right scalenus anterior muscle was absent. As a substitute for this muscle, some aberrant muscle slips arose from the lower vertebrae and descended in front of the ventral rami of the lower cervical nerves. These aberrant slips then ran between the ventral rami of the the eighth cervical and first thoracic nerves, and were fused with the right scalenus medius muscle. Thus, the subclavian artery and vein ran in front of the aberrant slips, together with the ventral ramus of the first thoracic nerve. The aberrant muscle slips issued 2 accessory bundles. One bundle ran between the ventral rami of the fourth and fifth cervical nerves and was fused with the scalenus medius muscle; the other bundle ran between the ventral rami of the fifth and sixth cervical nerves and was fused with the scalenus medius muscle.

Original languageEnglish
Pages (from-to)159-161
Number of pages3
JournalActa medica Okayama
Volume57
Issue number3
Publication statusPublished - Jun 2003

Keywords

  • Scalenus anterior muscle
  • Scalenus medius muscle
  • Subclavian artery and vein
  • Ventral rami of the lower cervical nerves
  • Ventral ramus of the first thoracic nerve

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)

Fingerprint Dive into the research topics of 'Absence of Scalenus Anterior Muscle'. Together they form a unique fingerprint.

Cite this