Facial expression muscles Flashcards
what CN supplies all the muscles of facial expression
CN7
common attachment points of all the facial expression muscles
one part of the muscle will attach on the skull and the other will attach to the skin and subcut tissue
Occipitofrontalis- Location, Action
l- frontal belly and occipital belly with galea aponeurotica located inbetween
A- contac skin on forhead
Orbicularis oculi (3 parts)- location, action (close eyes tight and gently)
L- Oribital part (most external), Palpebral (upper and lower eyelid), Lacrimal (produces fluid)
A- Orbital- close tight
palpebral- gently
Procerus + corrugator superficilli- location, acion
L-
Procerus- over bridge of nose
corr- oblique deep to frontal belly
A- cause longitudinal wringles at root of nose
Nasallis- Loc, A
l- descedes over ala and lateral parts of nose
a- compress nasal cartillages
Lev labii superioris alaque nasi- l,a
L- located lat to nasalis, descends toward upper lip
A- flare nostrils and raise upper lip
Orbicularis oris-l,a
l- for substance of upper and lower lip
a- close mouth tightly
Lev labii superioris- l, a
l- infraorbital region
a- elevates upper lip
Z minor and major- loc, a
l- infraorbital region- zygomatic bone to upper lip
A- elevate upper lip and angle of mouth
Levator anguli oris- loc, a
l- deep to levator labii superioris
a- elevate angle of mouth
Risorius- l, a
l- from mid cheek to angle of mouth
a- smile
Depressor anguli oris-l,a
l- most lat located under mouth
a- depresses mouth
Depressor labi inferioris-l,a
l- medially under mouth
a- depress moth
metalis- l,a
l- most medial under mouth
a- depresses chin and mouth, protrudes lower lip
