Nasal vestibule

Nasal Vestibule

The Nasal Vestibule is the most anterior part of the nasal cavity. It is the area of the nasal cavity that is enclosed by the flexible tissues of the nostril and extends to the nasal septum and lateral nasal wall. The nasal vestibule is lined with skin containing hair follicles, sweat glands, and sebaceous glands, which is different from the rest of the nasal cavity.

Anatomy

The nasal vestibule is the entryway to the respiratory system. It is surrounded by the alar cartilage and the nasal septum. The alar cartilage provides structure and shape to the nostrils, while the nasal septum separates the left and right airways in the nose, dividing the nasal cavity into halves.

The skin lining the nasal vestibule contains vibrissae, or nasal hair, which serve to filter dust and other particles from the inhaled air, protecting the more delicate tissues within the nasal cavity and the rest of the respiratory tract.

Function

The primary function of the nasal vestibule is to act as the initial segment of the respiratory system, filtering, warming, and humidifying inhaled air before it proceeds to the rest of the respiratory tract. The hairs and mucus within the nasal vestibule trap dust, pathogens, and other particles, preventing them from reaching the lungs.

The nasal vestibule also plays a role in the sense of smell. Airborne molecules are drawn into the nasal cavity and come into contact with the olfactory epithelium, a specialized tissue located further up in the nasal cavity, beyond the vestibule.

Clinical Significance

Infections, inflammations, and other pathological conditions can affect the nasal vestibule. Vestibulitis, for example, is an inflammation of the nasal vestibule, often caused by bacterial infection. Symptoms can include pain, redness, and nasal congestion. Treatment typically involves antibiotics and sometimes topical creams or ointments.

Nasal vestibulitis can also be caused by chronic nose picking (rhinotillexomania), excessive nose blowing, or intranasal drug use. In severe cases, it can lead to cellulitis, a potentially serious skin infection.