Muscles #1 Origin and Insertion

Question 1

Frontalis (Frontal Belly)

Answer 1

Origin: epicranial aponeurosis
Insertion: skin superior to supraorbital margin

Question 2

Frontalis (Occipital Belly)

Answer 2

Origin: occipital bone/mastoid process of temporal bone
Insertion: epicranial aponeurosis

Question 3

Orbicularis Oris

Answer 3

Origin: muscle fibers surrounding opening of mouth
Insertion: skin at corner of mouth

Question 4

Orbicularis Oculi

Answer 4

Origin: medial wall of orbit
Insertion: circular path around orbit

Question 5

Zygomaticus Major

Answer 5

Origin: zygomatic bone
Insertion: skin at angle of mouth/orbicularis oris

Question 6

Masseter

Answer 6

Origin: maxilla/zygomatic arch
Insertion: angle/ramps of mandible

Question 7

Sternocleidomastioid

Answer 7

Origin: sternal head; manubrium of sternum; clavicular head; medial third of clavicle
Insertion: mastoid process of temporal bone/lateral half of superior nuchal line of occipital bone

Question 8

Trapezius

Answer 8

Origin: superior nuchal line of occipital bone/spines of C7-T12
Insertion: clavicle; acromion/spine of scapula

Question 9

Buccinator

Answer 9

Origin: alveolar processes of maxilla/mandible; pterygomandibular raphe
Insertion: orbicularis oris muscle