Dog · Muscle · Vertebral column

Thoracic rhomboid muscle

Musculus rhomboideus thoracis

Draws the scapula back and toward the spine; holds it against the trunk.

System
Muscle
Region
Vertebral column
Sides
Paired: left and right

Where it runs from and to

A muscle is told apart from its neighbours by what it takes hold of at each end, which is also what decides what it does when it shortens.

Origin
Tips of the spines of the first few thoracic vertebrae.
Insertion
Hind part of the scapula's upper edge and the cartilage along it.
Action
Draws the scapula back and toward the spine; holds it against the trunk.
Nerve
Ventral branches of the cranial thoracic nerves.

Written for Vetomica in its own words from the standard reference anatomy of the dog; the books it was checked against are listed below.

What it works on

Bones it takes hold of

Muscles and ligaments it works with

  • Rhomboideus cervicis
  • Trapezius thoracic part
  • Latissimus dorsi
  • Serratus ventralis thoracis
  • Serratus dorsalis cranialis

Terminology

English
Thoracic rhomboid muscle
Latin (NAV)
Musculus rhomboideus thoracis
Status
A valid term in the Nomina Anatomica Veterinaria

References

Where to read this structure in full, and where the named parts above were read.

  • NAV 2017Myologia: musculi colli, trunci et membri thoracici (extrinsic muscles of the thoracic limb)
  • Miller's Anatomy of the Dog, 5th ed.The Muscular System: muscles of the thoracic limb (extrinsic)
  • König & LiebichMuscles of the thoracic limb
  • Dyce, Sack & WensingThe forelimb of the carnivores
  • Miller 2020 (book pass)ch. 6 The Muscular System, PDF p. 512