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Characteristics of face and neck muscles
not attached to a moving limb
attached to either skull bones or skin
can show changes in emotion
number of facial muscles
60
Orbicularis oculi
surrounds the eye
Orbicularis oris
surrounds the mouth
Nasalis
runs across the bridge of the nose
Mentalis
muscle on the chin
Buccinator
runs horizontally across the cheek
Zygomaticus
2 muscle strands running from zygomatic bone to the orbicularis oris
Platysma
runs from bottom of throat to the bottom of mandible
Masseter
vertically over the buccinators from the zygomatic arch and attaches to the mandible
Temporalis
begins at upper edge of temporal bone and attaches to the mandible
Frontalis
raises eyebrows
Occipitalis
synergist when raising eyebrows
Epicranius
Occipitalis and Frontalis
Occipitalis and Frontalis connection
epicranial aponeurosis
muscles needed to frown: muscles to smile
40:20
job of Orbicularis oculi
closes the eye or squinting
Job of Orbicularis oris
close and/or protrudes lips
job of Nasalis
Crinkles nose, opens and closes nostrils
job of mentalis
Protrudes lower lip
job of buccinator
sucks in the cheek
job of Zygomaticus
smiling
job of Platysma
frowning
job of temporalis and masseter
closing jaw