The sternohyoid arises from the posterior manubrium and medial clavicle via a flat tendinous origin and inserts into the inferior border of the hyoid body. As an infrahyoid strap muscle, its tendinous attachments depress the hyoid and larynx during swallowing and phonation.
The sternohyoid tendon is at risk during anterior cervical spine surgery and thyroid procedures, where the strap muscles must be retracted. Inadvertent division of the sternohyoid insertion may impair laryngeal depression and affect voice quality. Hyoid bone fracture can avulse the sternohyoid attachment.
High-energy neck trauma or manual strangulation producing avulsion at the sternohyoid insertion onto the hyoid, associated with dysphagia and anterior neck pain on swallowing.
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