Muscles of the Anterior Neck

Question 1

Digastric

Answer 1

Origin: 1) medial/inferior mandible; 2) mastoid process of temporal bone
Insertion: hyoid bone (via connective tissue loop)
Action: elevates hyoid bone and opens mouth

Question 2

Stylohyoid

Answer 2

Origin: styloid process of temporal bone
Insertion: hyoid bone
Action: elevates and retracts hyoid bone

Question 3

Mylohyoid

Answer 3

Origin: broadly along medial mandible
Insertion: hyoid bone and mid-line connective tissue
Action: elevates hyoid bone

Question 4

Sternohyoid

Answer 4

Origin: manubrium and medial clavicle
Insertion: hyoid bone
Action: depresses hyoid bone

Question 5

Thyrohyoid

Answer 5

Origin: thyroid cartilage of larynx
Insertion: hyoid bone
Action: depresses hyoid bone and elevates thyroid cartilage

Question 6

Omohyoid

Answer 6

Origin: superior surface of scapula
Insertion: hyoid bone
Action: depresses and retracts hyoid bone

Question 7

Sternocleidomastoid

Answer 7

Origin: manubrium and medial clavicle
Insertion: mastoid process
Action: flexes head

Question 8

Sternothyroid

Answer 8

Origin: posterior surface of manubrium
Insertion: thyroid cartilage of larynx
Action: depresses thyroid cartilage during speaking