Health Dictionary
Reliable, easy-to-read patient information on common medical conditions — written in plain language, free of jargon, and grounded in current evidence. Browse the most frequent diagnoses, understand what they mean for everyday life, and learn which steps and questions help you have a focused conversation with your doctor.
Sternothyroid muscle
Introduction
The Sternothyreoideus (or Sternothyroid muscle) is shorter and wider than the Sternohyoideus, beneath which it is situated.
It arises from the posterior surface of the manubrium sterni, below the origin of the Sternohyoideus, and from the edge of the cartilage of the first rib, and sometimes that of the second rib, it is inserted into the oblique line on the lamina of the thyroid cartilage.
This muscle is in close contact with its fellow at the lower part of the neck, but diverges somewhat as it ascends; it is occasionally traversed by a transverse or oblique tendinous inscription.
Variations
Variations
Doubling; absence; accessory slips to Thyreohyoideus, Inferior constrictor, or carotid sheath.
Additional images
Additional images
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Superficial dissection of the right side of the neck, showing the carotid and subclavian arteries. -
The fascia and middle thyroid veins. -
Hypoglossal nerve, cervical plexus, and their branches. -
Side view of the larynx, showing muscular attachments.
Editor-In-Chief: Template:Muscle infobox C. Michael Gibson, M.S., M.D. [1]