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Hyoid Muscles (Suprahyoid Region (Mylohyoid (O: mylohyoid line of mandible…
Hyoid Muscles
Suprahyoid Region
Mylohyoid
O: mylohyoid line of mandible
I: mylohyoid raphe and body of hyoid
N: nerve to mylohyoid
A: elevates hyoid, floor of mouth, and tongue during swallowing and speaking
Geniohyoid
O: inferior mental spine of mandible I: body of hyoid
N: C1 via hypoglossal n.
A: pulls hyoid anterosuperiorly
Stylohyoid
O: styloid process of temporal bone I: body of hyoid
N: stylohyoid n.
A: elevates and retracts hyoid
Anterior Digastric
O: digastric fossa of mandible I: intermediate tendon of body and greater horn of hyoid
N: nerve to mylohyoid
A: depresses mandible; elevates and steadies hyoid during swallowing and speaking
Posterior Digastric
O: mastoid notch of temporal bone I: intermediate tendon of body and greater horn of hyoid
N: digastric nerve
A: depresses mandible; elevates and steadies hyoid during swallowing and speaking
Infrahyoid Region
Sternohyoid
O: manubrium of sternum and medial end of clavicle I: body of hyoid
N: C1-C3 ansa cervicalis
A: depresses hyoid
Omohyoid
O: superior border of scapula near suprascapular notch I: inferior border of hyoid
N: C1-C3 ansa cervicalis
A: depress, retract, and steadies hyoid
Sternothyroid
O: posterior surface of manubrium of sternum I: oblique line of thyroid cartilage
N: C2-C3 ansa cervicalis
A: depress hyoid and larynx
Thyrohyoid
O: oblique line of thyroid cartilage I: inferior border of body and greater horn of hyoid
N: C1-C3 ansa cervicalis
A: depresses hyoid and elevates larynx