Epiglottic

Epiglottic is an adjective pertaining to the epiglottis, a leaf-shaped elastic cartilage structure at the top of the larynx that functions to protect the airway during swallowing. The epiglottis is covered by mucous membrane and sits behind the tongue, anterior to the laryngeal inlet. It is attached to the larynx by ligaments and to the hyoid bone by the hyoepiglottic ligament, with the stalk portion known as the petiolus forming part of its articulation.

Anatomically, the epiglottis forms part of the supraglottic region of the larynx. It consists of elastic cartilage, allowing it to bend and flip over the glottis during swallowing. Its vascularization is primarily from branches of the superior laryngeal artery, and its mucosa is innervated by branches of the vagus nerve, including the internal branch of the superior laryngeal nerve, which provides sensory input and taste sensation to the epiglottic surface.

Functionally, the epiglottis acts as a switch to direct airway contents. During swallowing, the larynx elevates and moves anteriorly, causing the epiglottis to retroflex and cover the laryngeal inlet, thereby reducing the risk of aspiration. After swallowing, the epiglottis returns to its resting position.

Clinical relevance includes conditions such as epiglottitis (supraglottitis), a potentially life-threatening inflammation that can obstruct the airway, and epiglottic tumors or cysts, which can affect its mobility and airway protection. Epiglottic tissue can also be involved in various laryngeal diseases and surgical procedures.