Frontalis
O: epicranial aponeurosis
I: skin above orbit
A: draws back scalp, wrinkles forehead, raises eyebrows
Orbicularis oculi
O: medial wall of orbit
I: skin around eyelids
A: Closes eyelids
Orbicularis oris
O: muscles surrounding mouth
I: skin at corner of mouth
A: closes & purses lips
Zygomaticus major
O: zygomatic bone
I: orbicularis oris
A: raises corner of mouth (smiling)
Buccinator
O: maxilla & mandible
I: orbicularis oris
A: presses cheeks inward
Masseter
O: maxilla & zygomatic arch
I: mandible
A: elevates mandible
Occipitalis
O: occipital bone & mastoid process
I: epicranial aponeurosis
A: draws scalp posteriorly
Temporalis
O: temporal & frontal bones
I: mandible
A: elevates & retracts mandible
Trapezius
O: occipital bone, spines of vertebrae
I: clavicle, scapula
A: extends head & elevates scapula
Platysma
O: fascia over deltoid & pectoralis major ms
I: mandible
A: depresses mandible
Sternocleidomastoid
O: sternum & clavicle
I: mastoid process
A: flexes head, or rotates head from side-side
Digastric
O: mandible & mastoid process
I: hyoid bone
A: depresses mandible, elevates hyoid bone
Mylohyoid
O: mandible
I: hyoid bone
A: depresses mandible, elevates hyoid bone
Levator scapulae
O: C1-C4
I: scapula
A: elevates, rotates, and retracts scapula
Sternohyoid
O: manubrium & first costal cartilage
I: hyoid bone
A: depresses hyoid
Zygomaticus minor
O: zygomatic bone
I: upper lip
A: raises upper lip, exposing teeth (grimace)
Occipitofrontalis