Cat Muscles - Neck Muscles

Question 1

Sternomastoid

Answer 1

Origin: Median raphe & manubrium of sternum
Insertion: Lambdoidal ridge and mastoid process
Action: turns the head (singly), depresses head on neck (together)

Question 2

Sternohyoid

Answer 2

Origin: First costal cartilage
Insertion: Body of hyoid bone
Action: Draw hyoid posteriorly

Question 3

Cleidomastoid

Answer 3

Origin: Clavicle
Insertion: Mastoid process
Action: Pulls clavicle craniad or turns head (singly), Lowers head on neck (together)

Question 4

Masseter

Answer 4

Origin: Zygomatic arch
Insertion: Posterior half of lateral surface of mandible
Action: Elevates the lower jaw up and forward

Question 5

Temporalis

Answer 5

Origin: Superior nuchal line to zygomatic process of frontal bone & part of zygomatic arch
Insertion: Coronoid process of mandible
Action: Elevates the lower jaw up and back

Question 6

Digastric

Answer 6

Origin: Jugular and mastoid process
Insertion: Mandible
Action: Depresses the lower jaw

Question 7

Mylohyoid

Answer 7

Origin: Mandible
Insertion: Median raphe
Action: Raises floor of mouth and brings hyoid forward