1. Strap (parallel)
Convergent
Sphincter
Unipennate
Bipennate
Multipennate

3. Muscles of Facial Expression *
Epicranius frontalis m. - wrinkles the forehead
Orbicularis oculi m. - closes the eye
Nasalis m. - widens the nostrils
Risorius m. - draws angle of mouth laterally
Orbicularis oris m. - “pucker” muscle
Plate 22

4. Muscles of Facial Expression, cont.
Procerus - pulls eyebrows medially and down
Levator labii superioris m. - “Elvis” muscle
Zygomaticus m. - smile muscle
Depressor anguli oris m. - frown muscle
Depressor labii inferioris m. - “pout” muscle
Levator palpebrae superioris m. - raises upper lid, CN III

6. Temporalis m. Masseter O: temporal fossa, temporal lines
I: coronoid process of the mandible
A: elevates the mandible
Masseter
O: zygomatic arch
I: lateral portion of the ramus of the mandible
Plate 50 (54)

7. Lateral pterygoid m. Medial pterygoid m. O: sphenoid bone
I: anterior side of condylar process of mandible
A: protracts the mandible, can depress the mandible and move mandible side to side
Medial pterygoid m.
I: medial aspect of the mandible
A: elevate the mandible, move mandible side to side (grinding motion), and can help protract the mandible
Plate 51 (55)

8. Superior Orbital Oblique m.
Lateral
Medial
Superior View
(from above)

9. Extrinsic Ocular Muscles
Trochlea
Levator palpebrae superioris m.
Superior oblique m.
Superior rectus m.
Lateral rectus m.
Inferior
orbital oblique m.
Plate 80 (84)