Orbicular muscle of the eye

About the orbicular muscle of the eye of the dog

Orbicular muscle of the eye is a muscle of the head (head), one on each side of the body. Its name in the Nomina Anatomica Veterinaria is Musculus orbicularis oculi. You can turn it above, see it in place in the head 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

The medial palpebral ligament at the inner angle of the eye.

Insertion

Fibres circle within both eyelids and return to the same place.

Action

Closes the eyelids.

Nerve

Auriculopalpebral branch of the facial 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

• Frontal bone
• Zygomatic bone
• Lacrimal bone

Muscles and ligaments it works with

• Levator anguli oculi medialis
• Lateral retractor of the angle of the eye
• Frontalis
• Malaris
• Nasolabial levator muscle
• Levator palpebrae superioris
• Orbital ligament

Terminology

English

Orbicular muscle of the eye

Latin (NAV)

Musculus orbicularis oculi

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
• Miller's Anatomy of the Dog, 5th ed.The Muscular System: muscles of the head
• Dyce, Sack & WensingThe head and ventral neck of the dog and cat
• Miller 2020 (book pass)ch. 6 The Muscular System, PDF p. 467, 1760

The orbicular muscle of the eye in other animals

The same structure in the other animals in the Library, to compare.

• Orbicular muscle of the eye of the cat
• Orbicular muscle of the eye of the horse

Questions about the orbicular muscle of the eye

What is the Latin name of the orbicular muscle of the eye?

In the Nomina Anatomica Veterinaria, the orbicular muscle of the eye is called Musculus orbicularis oculi.

Where is the orbicular muscle of the eye of the dog?

Orbicular muscle of the eye is a muscle of the head (head), one on each side of the body.

Which bones does the orbicular muscle of the eye attach to?

Orbicular muscle of the eye takes hold of Frontal bone, Zygomatic bone and Lacrimal bone.

Where does the orbicular muscle of the eye originate and insert?

Origin: The medial palpebral ligament at the inner angle of the eye. Insertion: Fibres circle within both eyelids and return to the same place.

What nerve supplies the orbicular muscle of the eye?

Auriculopalpebral branch of the facial nerve.

What does the orbicular muscle of the eye do?

Closes the eyelids.