Suprahyoid Strap Muscles

Question 1

What is the action of the suprahyoid muscles?

Answer 1

Elevate hyoid bone (action involved in swallowing)

Question 2

What are the attachments of the digastric muscle?

Answer 2

. Anterior and posterior belly joined by tendon, which joins to hyoid bone via fibrous sling
. Anterior belly originates from digastric fossa of mandible
. Posterior belly originates from mastoid process of temporal bone

Question 3

What is the innervation of the digastric muscle?

Answer 3

. Anterior belly innervated by inferior alveolar branch of mandibular nerve, which is derived from the trigeminal nerve
. Posterior belly innervated by digastric branch of facial nerve

Question 4

What are the attachments of the stylohyoid muscle?

Answer 4

Originates from styloid process of temporal bone, inserts into lateral aspect of hyoid bone

Question 5

What is the innervation of the stylohyoid muscle?

Answer 5

Stylohyoid branch of facial nerve

Question 6

What are the attachments of the mylohyoid muscle?

Answer 6

Originates from mandible, inserts into hyoid

Question 7

What is the innervation of the mylohyoid muscle?

Answer 7

Inferior alveolar nerve (branch of mandibular nerve, derived from trigeminal nerve)

Question 8

What are the attachments of the geniohyoid muscle?

Answer 8

Originates from mandible, attaches to hyoid bone

Question 9

What is the innervation of the geniohyoid bone?

Answer 9

C1 nerve root, which runs with the hypoglossal nerve

Question 10

What is the blood supply of the suprahyoid muscles?

Answer 10

Branches of the facial, occipital, and lingual arteries