Pretracheal fascia

Diagram of the pretracheal fascia and its surrounding structures.

The pretracheal fascia is a layer of the deep cervical fascia in the neck. It is an important anatomical structure that encases the trachea, esophagus, and thyroid gland, providing support and protection to these vital components of the neck.

Anatomy

The pretracheal fascia is part of the deep cervical fascia, which is divided into several layers. The pretracheal fascia specifically surrounds the trachea and extends from the hyoid bone above to the thorax below, where it blends with the fibrous pericardium.

Layers

The pretracheal fascia can be divided into two layers:

• Muscular layer: This layer encloses the infrahyoid muscles, which are responsible for depressing the hyoid bone and larynx during swallowing and speech.
• Visceral layer: This layer surrounds the thyroid gland, trachea, and esophagus.

Relations

The pretracheal fascia is closely related to other fascial layers in the neck:

• Anteriorly, it is continuous with the investing layer of deep cervical fascia.
• Posteriorly, it is related to the buccopharyngeal fascia, which covers the pharynx and esophagus.
• Laterally, it blends with the carotid sheath, which contains the common carotid artery, internal jugular vein, and vagus nerve.

Function

The pretracheal fascia serves several important functions:

• Support: It provides structural support to the trachea, esophagus, and thyroid gland, maintaining their positions in the neck.
• Protection: It acts as a protective barrier, shielding these structures from external trauma.
• Facilitation of movement: It allows for the smooth movement of the trachea and esophagus during swallowing and breathing.

Clinical Significance

The pretracheal fascia is clinically significant in several contexts:

• Surgical access: Understanding the anatomy of the pretracheal fascia is crucial for surgeons performing procedures such as thyroidectomy or tracheostomy.
• Infection spread: Infections in the neck can spread along fascial planes, and the pretracheal fascia can act as a pathway for the spread of infection from the neck to the mediastinum.

Related Pages

• Deep cervical fascia
• Thyroid gland
• Trachea
• Esophagus
• Carotid sheath