Download Muscle Study Slides

Strap (parallel)
Convergent
Sphincter
Unipennate
Bipennate
Multipennate
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
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
• Temporalis m.
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
A: elevates the mandible
Plate 50 (54)
• Lateral 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.
O: sphenoid bone
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)
Superior Orbital Oblique m.
Lateral
Medial
Superior View
(from above)
Extrinsic Ocular Muscles
Trochlea
Levator palpebrae superioris m.
Superior oblique m.
Superior rectus m.
Lateral rectus m.
Plate 80 (84)
Inferior
orbital oblique m.