Lacrimal hamulus

Lacrimal Hamulus

The Lacrimal Hamulus (Hamulus lacrimalis) is a small hook-like structure in the human skull. It is a part of the Lacrimal bone, which is one of the smallest and most fragile bones of the face. The Lacrimal Hamulus is located at the medial wall of the orbit, where it serves as a turning point for the Tendon of the Tensor Tarsi Muscle.

File:Lacrimal bone - close-up - anterior view.png

The Lacrimal bone of the human skull, showing the location of the Lacrimal Hamulus (highlighted).

Structure

The Lacrimal Hamulus is a small, hook-like projection that extends from the lower part of the Lacrimal bone. It is located at the front part of the medial wall of the orbit, near the Lacrimal sac. The Lacrimal Hamulus is directed horizontally and slightly backwards.

Function

The primary function of the Lacrimal Hamulus is to serve as a turning point for the Tendon of the Tensor Tarsi Muscle. This muscle is responsible for the tension of the tarsi and the opening of the Lacrimal canaliculi, which are small channels that drain tears from the Eye to the Nasal cavity.

Clinical significance

Due to its small size and delicate structure, the Lacrimal Hamulus is susceptible to fractures. Fractures of the Lacrimal Hamulus can lead to Dacryocystitis, which is an inflammation of the Lacrimal sac due to obstruction of the Nasolacrimal duct.

See also

• Lacrimal bone
• Tensor Tarsi Muscle
• Orbit (anatomy)