Facial Muscles: Ch4 Head and Neck Anatomy
What is the origin and insertion of the zygomaticus major muscle?
Origin: zygomatic bone (lateral/minor) Insertion: tissue at the angle of the mouth
What is the action of levator anguli oris muscle?
elevates angle of mouth upon smiling
What is the action of the zygomaticus major muscle?
elevates the upper lip, pulls laterally, aids in smiling
What is the origin and insertion of the corrugator supercilii muscle?
origin: Frontal bone in supraorbital region insertion: skin of tissue of eyebrow
What is the origin and insertion of the buccinator muscle?
origin: alevolar process of maxilla, mandible, ptyrogomandibular raphe insertion: angle of mouth
From What type of tissue do all the muscles of facial expression originate?
surface of skull bone
What is the origin and insertion of the levator anguli oris muscle?
origin: canine fossa of maxilla insertion: skin of tissue at angle of mouth
What is the origin and insertion of risorius muscle?
origin: fascia superficial to the masseter muscle insertion: the skin of the tissue at the angle of the mouth
What is the origin and insertion of epicranial muscle?
origin: frontal belly (epicranial\aponeurosis), Occipital Belly (occipital/ temporal bones) insertion: frontal belly (skin of eyebrow and root of nose) Occipital Belly (epicranial/aponeurosis)
What is the origin and insertion of levator labii superioris alaeque nasi muscle?
origin: frontal process of maxilla insertion:skin of upper lip and ala
What is the origin and insertion of the levator labi superioris muscle?
origin: infraorbital rim of maxilla insertion: skin of upper lip
What is the origin and insertion of the depressor anguli oris muscle?
origin: lower border of mandible insertion: skin tissue at angle of mouth
What is the origin and insertion of the depressor labii inferiors muscle?
origin: lower border of the mandible insertion: skin of tissue at lower lip
What is the origin and insertion of the mentalis muscle?
origin: mandible insertion: chin
What is the origin and insertion of the orbicularis oculi?
origin: oribital rim, frontal bone, maxilla insertion: skin of lateral region of eye
What is the origin and insertion of the platysma
origin: skin tissue superficial to clavicle and shoulder insertion: lower border of mandible and muscles surrounding the mouth
What is the origin and inserton of the zygomaticus minor muscle?
origin: zygomatic bone, medial to major insertion: skin of upper lip
What is the action of risorius muscle?
stretches the lips laterally
What is the innervation for all of the muscles of facial expression?
7th (facial) cranial nerve
How can temporary facial paralysis occur due to dentally caused damage?
Damage to the facial nerve, during injections
What are the muscles of facial expression?
Epicranial, orbicularis oculi, orbicularis oris, buccinator, risorius, levator labii superioris , levator labii superioris alaeque nasi, zygomaticus major, zygomaticus minor, levator anguli oris, depressor anguli oris, depressor labii inferiors, mentalis, platysma
What is the origin and insertion of the orbicularis oris muscle?
Origin: encircles the mouth insertion: skin of the lips at the labial commissures of the mouth
What is the action of zygomaticus minor muscles?
assists in smiling, elevates upper lip
What is the action of the buccinator muscle?
causes food to be pushed and held back
What is the action of the orbicularis oculi?
closes eyelid
What is the action of the orbicularis oris muscle?
closing the lips, pursing, kissing, grimacing, pouting
What muscles are involved in frowning?
corrugator supercilli muscle, depressor anguli oris muscle
What is the action of the depressor labii inferioris muscle?
depress the lower lip exposing the mandibular teeth
Into what type of tissue do all muscles of facial expression insert?
dermis of skin
What is the action of the corrugator supercilii muscle ?
frowning
What is the action of the depressor anguli oris muscle?
frowning
What muscles elevate the upper lip?
levator labii superioris, levator labii superioris alaeque nasi, zygomaticus minor, zygomaticus major,
What muscles aid in grimacing?
platysma muscle, orbicularis oris muscle
What is the action of the mentalis muscle?
protruding lower lip
What is the action of the levator labii superioris alaeque nasi muscle?
raises skin of upper lip& ala, dilates the nostrils
What is the action of the epicranial muscle?
raises the eyebrow and scalp
What is the action of levator labi superioris muscle?
raises the upper lip
What is the action of the platysma?
raising neck skin and grimacing
What muscles aid in smiling?
zygomaticus major, zygomaticus minor, levator anguli oris muscle
