Lateral head of the triceps

About the lateral head of the triceps of the dog

Lateral head of the triceps is a muscle of the front leg (thoracic limb), one on each side of the body. Its name in the Nomina Anatomica Veterinaria is Musculus triceps brachii caput laterale. You can turn it above, see it in place in the front leg of the dog, and open it inside the whole animal in Vetomica.

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

Tricipital line on the lateral humerus, running up toward the deltoid tuberosity.

Insertion

Lateral side of the olecranon tuber.

Action

Extends the elbow.

Nerve

Radial nerve.

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

• Humerus
• Ulna

Muscles and ligaments it works with

• Long head of the triceps
• Triceps brachii accessory head
• Anconeus
• Brachial muscle
• Deltoideus
• Radial extensor muscle of the carpus

Terminology

English

Lateral head of the triceps

Latin (NAV)

Musculus triceps brachii caput laterale

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 membri thoracici
• Miller's Anatomy of the Dog, 5th ed.The Muscular System: muscles of the thoracic limb
• König & LiebichMuscles of the thoracic limb
• Dyce, Sack & WensingThe forelimb of the carnivores

Questions about the lateral head of the triceps

What is the Latin name of the lateral head of the triceps?

In the Nomina Anatomica Veterinaria, the lateral head of the triceps is called Musculus triceps brachii caput laterale.

Where is the lateral head of the triceps of the dog?

Lateral head of the triceps is a muscle of the front leg (thoracic limb), one on each side of the body.

Which bones does the lateral head of the triceps attach to?

Lateral head of the triceps takes hold of Humerus and Ulna.

Where does the lateral head of the triceps originate and insert?

Origin: Tricipital line on the lateral humerus, running up toward the deltoid tuberosity. Insertion: Lateral side of the olecranon tuber.

What nerve supplies the lateral head of the triceps?

Radial nerve.

What does the lateral head of the triceps do?

Extends the elbow.