A Lateral View of the Platysma Muscle of a Male

Description

Running as a thin, superficial sheet over the anterolateral neck, the platysma extends from the superficial fascia of the upper thorax and pectoral region to insert along the inferior border of the mandible and into the skin of the lower face. From this lateral view, its fibers cross superiorly over the clavicle and course toward the angle of the mandible, lying superficial to the sternocleidomastoid and the deeper infrahyoid strap muscles. Superiorly, the platysma blends with the superficial musculoaponeurotic system near the lower cheek, while inferiorly it remains continuous with the superficial cervical fascia. Clinically, the platysma defines a key surgical plane in the neck because the external jugular vein and the cervical branch of the facial nerve travel in the superficial tissues immediately deep to, or closely associated with, this muscle as they cross the sternocleidomastoid. A clean understanding of platysmal fiber direction and its relationship to the mandible helps when planning rhytidectomy and neck lift incisions, managing platysmal banding, and interpreting anterior neck soft tissue injuries where the muscle can contribute to skin retraction. Small muscle, big consequences. Use this artwork in head and neck anatomy teaching to orient learners to the superficial fascia of the cervical region before introducing deeper compartments, triangles, and neurovascular bundles, and in surgical texts describing subplatysmal flap elevation and closure. It also supports patient-facing education on cosmetic neck procedures and traumatic lacerations that violate the platysma. Anatomical accuracy verified by SciePro's Medical Advisory Board.