The interactive dog atlas · Muscles · Trunk

Pectorals musculi pectorales

The pectorals are the chest muscles, from the sternum to the bone of the upper arm; from the side their edge shows below the chest. They fasten the front leg to the trunk.

Educational material, not a diagnostic tool. Written by the Mantrailing România team from veterinary sources we read. Updated 14.11.2026.

Dog in left lateral view — exterior, muscles, skeleton and organs Vector study after the Ellenberger, Baum and Dittrich plates: a standing dog, head to the left, deep chest and digitigrade limbs. The four layers use the same contour: exterior with body regions, superficial muscles, skeleton and organs.
Pectorals on the atlas drawing, "Muscles" layer. Left lateral view, after the Ellenberger, Baum and Dittrich plates.

Where it is

On the chest, from the sternum to the humerus; from the side their edge shows below the thorax.

Layer
Muscles
System
Muscles
Region
Trunk

What it is and what it does

Extrinsic muscles that fasten the limb to the sternum. The superficial pectorals insert on the crest of the greater tubercle of the humerus and support the limb, pulling it inward; the deep pectoral, the heaviest muscle of the forelimb in the greyhound, pulls the trunk forward over the supporting limb and extends the shoulder.

Worth remembering

The deep pectoral pulls the trunk forward over the leg planted on the ground; in the greyhound it is the heaviest muscle of the front leg.

Names

  • Latin term: musculi pectorales.
  • In Romanian: Pectoralii (Romanian page).

Guides it appears in