Infrahyoid Muscles 3D

  • Sternohyoid Muscle
    • * Originates from the posterior surface of the manubrium of the sternum and the medial end of the clavicle.
    • * Inserts onto the lower border of the body of the hyoid bone.
    • * Receives blood supply from the superior thyroid artery and superior and inferior thyroid veins.
    • * Innervated by the ansa cervicalis (C1 to C3).
    • * Functions to depress the hyoid bone after swallowing and assists in stabilizing the hyoid and larynx during speech and swallowing.

 

  • Omohyoid Muscle​​​​​​​
    • * Consists of two bellies, the superior belly and the inferior belly.
    • * The superior belly originates from the intermediate tendon attached to the hyoid bone.
    • * The inferior belly originates from the superior border of the scapula.
    • * Both bellies unite to form a common tendon attached to the intermediate tendon.
    • * Receives blood supply from branches of the superior thyroid artery.
    • * Innervated by the ansa cervicalis (C1 to C3).
    • * Functions to depress the hyoid bone and assist in swallowing and speech.

 

  • Sternothyroid Muscle​​​​​​​
    • * Originates from the posterior surface of the manubrium of the sternum and the first costal cartilage.
    • * Inserts onto the oblique line of the thyroid cartilage.
    • * Receives blood supply from the superior thyroid artery.
    • * Innervated by the ansa cervicalis (C1 to C3).
    • * Functions to depress the thyroid cartilage and lower the larynx during swallowing and speech.

 

  • Thyrohyoid Muscle​​​​​​​
    • * Originates from the oblique line of the thyroid cartilage.
    • * Inserts onto the body and greater horn of the hyoid bone.
    • * Receives blood supply from the superior thyroid artery and superior laryngeal artery.
    • * Innervated by C1 fibers via the hypoglossal nerve (CN XII).
    • * Functions to elevate the larynx and depress the hyoid bone.

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  • Sternohyoid Muscle
    • * Originates from the posterior surface of the manubrium of the sternum and the medial end of the clavicle.
    • * Inserts onto the lower border of the body of the hyoid bone.
    • * Receives blood supply from the superior thyroid artery and superior and inferior thyroid veins.
    • * Innervated by the ansa cervicalis (C1 to C3).
    • * Functions to depress the hyoid bone after swallowing and assists in stabilizing the hyoid and larynx during speech and swallowing.

 

  • Omohyoid Muscle​​​​​​​
    • * Consists of two bellies, the superior belly and the inferior belly.
    • * The superior belly originates from the intermediate tendon attached to the hyoid bone.
    • * The inferior belly originates from the superior border of the scapula.
    • * Both bellies unite to form a common tendon attached to the intermediate tendon.
    • * Receives blood supply from branches of the superior thyroid artery.
    • * Innervated by the ansa cervicalis (C1 to C3).
    • * Functions to depress the hyoid bone and assist in swallowing and speech.

 

  • Sternothyroid Muscle​​​​​​​
    • * Originates from the posterior surface of the manubrium of the sternum and the first costal cartilage.
    • * Inserts onto the oblique line of the thyroid cartilage.
    • * Receives blood supply from the superior thyroid artery.
    • * Innervated by the ansa cervicalis (C1 to C3).
    • * Functions to depress the thyroid cartilage and lower the larynx during swallowing and speech.

 

  • Thyrohyoid Muscle​​​​​​​
    • * Originates from the oblique line of the thyroid cartilage.
    • * Inserts onto the body and greater horn of the hyoid bone.
    • * Receives blood supply from the superior thyroid artery and superior laryngeal artery.
    • * Innervated by C1 fibers via the hypoglossal nerve (CN XII).
    • * Functions to elevate the larynx and depress the hyoid bone.

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