Infrahyoid Region in the Female Neck, Anterior View

Description

Centered on the midline between the hyoid bone superiorly and the suprasternal (jugular) notch inferiorly, the infrahyoid region is organized in layers from skin and platysma to the investing cervical fascia and the strap muscles. Sternohyoid and omohyoid lie more superficial and medial, while sternothyroid and thyrohyoid sit deeper, spanning from the sternum and thyroid cartilage up toward the hyoid, with the laryngeal framework (thyroid and cricoid cartilages) and upper trachea positioned deep to them. Laterally, the sternocleidomastoid margins define the transition toward the carotid triangle, where the carotid sheath contents course vertically and the anterior jugular veins often appear superficial to the strap muscles. Midline anatomy is the story here. Anterior exposure of the infrahyoid compartment matters because these planes are the workhorse corridor for airway access and thyroid surgery. During thyroidectomy, the surgeon typically separates the strap muscles along the linea alba cervicalis and retracts them laterally to reach the thyroid gland and superior pole vessels, while protecting the anterior jugular venous plexus and anticipating the course of the ansa cervicalis on the anterior surface of the internal jugular vein. A similar midline pathway guides emergency cricothyrotomy at the cricothyroid membrane and planned tracheostomy between tracheal rings, where infrahyoid muscle position and laryngeal landmarks govern both speed and safety. Use this illustration in head and neck gross anatomy labs to teach strap muscle layering, surface landmarks for the larynx and trachea, and the relationship of the midline cervical fascia to the carotid sheath. It also fits cleanly into ENT and endocrine surgery manuals, airway management training, and patient education materials explaining anterior neck incisions and postoperative strap muscle reapproximation. Anatomical accuracy verified by SciePro's Medical Advisory Board.