intercostalis thoracis

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Introduction

Deep back (erector spinae) muscle.

Origin

medial side of the angles of the lower 6 ribs

Insertion

angles of the upper 6 ribs

Action

extends, abducts & rotates thoracic vertebrae

Innervation

dorsal branches of the thoracic nerves

More general terms

References

  1. Stedman's Medical Dictionary 27th ed, Williams & Wilkins, Baltimore, 1999