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Suprahyoid Muscles 3D

  • Digastric Muscle
    • * Anterior belly originates from the digastric fossa of the mandible, while the posterior belly originates from the mastoid notch of the temporal bone.
    • * Both bellies insert onto an intermediate tendon attached to the hyoid bone via a fibrous sling.
    • * Receives blood supply from the facial artery and posterior auricular artery.
    • * The anterior belly is innervated by the mandibular branch of the trigeminal nerve (CN V3), and the posterior belly is innervated by the facial nerve (CN VII).
    • * Functions to elevate the hyoid bone and depress the mandible during swallowing or speaking.

 

  • Mylohyoid Muscle​​​​​​​
    • * Originates from the mylohyoid line of the mandible.
    • * Inserts at the midline raphe and body of the hyoid bone.
    • * Receives blood supply from the mylohyoid branches of the inferior alveolar artery and submental artery.
    • * Innervated by the mylohyoid nerve, a branch of the mandibular division of the trigeminal nerve (CN V3).
    • * Functions to elevate the floor of the mouth during swallowing and speaking, and assists in depressing the mandible.

 

  • Geniohyoid Muscle​​​​​​​
    • * Originates from the inferior mental spine of the mandible.
    • * Inserts onto the anterior surface of the body of the hyoid bone.
    • * Receives blood supply from the submental artery, a branch of the facial artery.
    • * Innervated by the first cervical spinal nerve (C1) via the hypoglossal nerve (CN XII).
    • * Functions to elevate the hyoid bone and depress the mandible.

 

  • Stylohyoid Muscle​​​​​​​
    • * Originates from the styloid process of the temporal bone.
    • * Inserts onto the body and greater horn of the hyoid bone.
    • * Receives blood supply from the facial artery.
    • * Innervated by the facial nerve (CN VII).
    • * Functions to elevate the hyoid bone and assist in 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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  • Digastric Muscle
    • * Anterior belly originates from the digastric fossa of the mandible, while the posterior belly originates from the mastoid notch of the temporal bone.
    • * Both bellies insert onto an intermediate tendon attached to the hyoid bone via a fibrous sling.
    • * Receives blood supply from the facial artery and posterior auricular artery.
    • * The anterior belly is innervated by the mandibular branch of the trigeminal nerve (CN V3), and the posterior belly is innervated by the facial nerve (CN VII).
    • * Functions to elevate the hyoid bone and depress the mandible during swallowing or speaking.

 

  • Mylohyoid Muscle​​​​​​​
    • * Originates from the mylohyoid line of the mandible.
    • * Inserts at the midline raphe and body of the hyoid bone.
    • * Receives blood supply from the mylohyoid branches of the inferior alveolar artery and submental artery.
    • * Innervated by the mylohyoid nerve, a branch of the mandibular division of the trigeminal nerve (CN V3).
    • * Functions to elevate the floor of the mouth during swallowing and speaking, and assists in depressing the mandible.

 

  • Geniohyoid Muscle​​​​​​​
    • * Originates from the inferior mental spine of the mandible.
    • * Inserts onto the anterior surface of the body of the hyoid bone.
    • * Receives blood supply from the submental artery, a branch of the facial artery.
    • * Innervated by the first cervical spinal nerve (C1) via the hypoglossal nerve (CN XII).
    • * Functions to elevate the hyoid bone and depress the mandible.

 

  • Stylohyoid Muscle​​​​​​​
    • * Originates from the styloid process of the temporal bone.
    • * Inserts onto the body and greater horn of the hyoid bone.
    • * Receives blood supply from the facial artery.
    • * Innervated by the facial nerve (CN VII).
    • * Functions to elevate the hyoid bone and assist in 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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