Geniohyoid - Podcast Version 0:00 / 0:00 1x 0.25x 0.5x 0.75x 1x 1.25x 1.5x 1.75x 2x The geniohyoid is a suprahyoid muscle of the neck. It is located either side of the midline of the neck, deep to the mylohyoid muscle. Attachments: Arises from the inferior mental spine of the mandible. It then travels inferiorly and posteriorly to attach to the hyoid bone. Actions: Depresses the mandible and elevates the hyoid bone. Innervation: C1 nerve roots that run within the hypoglossal nerve. Blood Supply: Sublingual branch of lingual artery. By TeachMeSeries Ltd (2026) Fig 1Lateral view of the neck with three of the suprahyoid muscles highlighted (digastric, mylohyoid and stylohyoid) By TeachMeSeries Ltd (2026) Fig 2Anterior view of the neck with the suprahyoid muscles highlighted. Pro Feature - 3D Model You've Discovered a Pro Feature Access our 3D Model Library Explore, cut, dissect, annotate and manipulate our 3D models to visualise anatomy in a dynamic, interactive way. Learn More Frequent questions What is the geniohyoid muscle? The geniohyoid muscle is a suprahyoid muscle located in the neck, positioned bilaterally and deep to the mylohyoid muscle. It plays a crucial role in movements involving the mandible and hyoid bone. What are the attachments of the geniohyoid muscle? The geniohyoid muscle originates from the inferior mental spine of the mandible and extends inferiorly and posteriorly to attach to the hyoid bone. This specific positioning aids in its functional role during swallowing and speech. What actions does the geniohyoid muscle perform? The geniohyoid muscle primarily depresses the mandible and elevates the hyoid bone. These actions are essential for various functions, including swallowing and facilitating certain vocalisations. How is the geniohyoid muscle innervated? The geniohyoid muscle is innervated by the C1 nerve roots, which travel within the hypoglossal nerve. This innervation is vital for the muscle's motor function and coordination during activities like swallowing. What is the blood supply to the geniohyoid muscle? The geniohyoid muscle receives its blood supply from the sublingual branch of the lingual artery. This vascularisation supports the muscle's metabolic needs during its functions in the neck. Rate This Article