Unit 4 - Head and Neck: Suprahyoid Muscles (Ex. III)

Question 1

P belly of digastric

Answer 1

O: mastoid notch of T bone, M to mastoid process
I: body of hyoid bone via intermediate tendon w/ fibrous loop
Inn: facial n. (CN VII)
A: elevates hyoid bone (swallowing); assists in opening mandible

Question 2

stylohyoid

Answer 2

O: styloid process of T bone
I: body of hyoid bone via split tendon
Inn: facial n. (CN VII)
A: elevates hyoid bone (swallowing); assists in opening mandible

Question 3

mylohyoid

Answer 3

O: mylohyoid line of mandible
I: body of hyoid bone via median tendon of insertion (mylohyoid raphe)
Inn: mylohyoid n. from CN V3
A: tightens and elevates oral floor; protracts hyoid bone (swallowing); assists in opening mandible and L moving it during mastication

Question 4

geniohyoid

Answer 4

O: I mental spine of mandible
I: body of hyoid bone
Inn: A ramus of C1 via hypogolssal n. (CN XII)
A: protracts hyoid bone (swallowing); assists in opening mandible

Question 5

A belly of digastric

Answer 5

O: digastric fossa of mandible
I: body of hyoid bone via intermediate tendon w/ fibrous loop
Inn: mylohyoid n. from CN V3
A: elevates hyoid bone (swallowing); assists in opening mandible