Orbitalis muscle

Orbitalis Muscle

Orbitalis muscle (shown in red) within the human eye. Image adapted from Gray's Anatomy.

The Orbitalis muscle is a small, thin muscle that is located within the orbit of the eye. It is a rare anatomical variant, not present in all individuals.

Structure

The Orbitalis muscle originates from the orbital bone and inserts into the orbicularis oculi muscle. It is located between the orbital septum and the levitator palpebrae superioris muscle.

Function

The function of the Orbitalis muscle is not well understood due to its rarity. It is hypothesized that it may assist in the movement of the eyelid or the globe of the eye.

Clinical significance

Due to its rarity, the Orbitalis muscle is often overlooked in clinical practice. However, it may be of significance in surgical procedures involving the orbit, such as blepharoplasty.

See also

• List of muscles of the human body
• Orbit (anatomy)
• Orbicularis oculi muscle