Suprahyoid Muscles

Question 1

Mylohyoid

Answer 1

O: Mylohyoid line of mandible
I: Mylohyoid raphe and body of hyoid
N: Nerve to Mylohyoid (CN V3, mandibular nerve)
A: elevates hyoid, floor of mouth, and tongue during swallowing and speaking

Question 2

Geniohyoid

Answer 2

O:Inferior mental spine of mandible
I: Body of Hyoid
N: C1 via Hypoglossal Nerve (CN XII)
A: Pulls hyoid anterosuperiorly; shortens the floor of mouth; widens pharynx

Question 3

Stylohyoid

Answer 3

O: Styloid process of temporal bone
I: Body of Hyoid
N: Facial N (CN VII)
A: Elevates and retracts hyoid, thus elongating the floor of the mouth

Question 4

Anterior Belly of Digastric

Answer 4

O: Digastric Fossa of Mandible
I: Intermediate Tendon to body and greater horn of hyoid
N: Nerve to Mylohyoid, a branch of inferior alveolar nerve
A: Working with infra hyoid muscles, depresses mandible against resistance; elevates and steadies hyoid during swallowing and speaking

Question 5

Posterior Belly of Digastric

Answer 5

O: Mastoid notch of Temporal Bone
I: Intermediate Tendon to body and greater horn of hyoid
N: Facial N (CN VII)
A: Working with infra hyoid muscles, depresses mandible against resistance; elevates and steadies hyoid during swallowing and speaking