Superficial Face - Muscles of Facial Expression - Muscles of the Mouth Flashcards
What are the muscles of the Mouth?
Depressor Anguli Oris, Zygomatic Major and Minor, Levator Labii Superioris, Levator Anguli Oris, Depressor Labii Inferioris, Buccinator, Orbicular Oris
What is the origin of the Depressor Anguli Oris muscle?
Oblique line of mandible
What is the insertion of the Depressor Anguli Oris muscle?
angle of the mouth
What is the nerve supply of the Depressor Anguli Oris muscle?
branches of facial nerve (CN VII)
What is the action of the Depressor Anguli Oris muscle?
acts to depress the corners of the mouth
What is the blood supply of the Depressor Anguli Oris muscle?
facial artery
What is noteworthy about the Depressor Anguli Oris muscle?
“frown” muscle
What is the origin of the Zygomatic Major and Minor muscles?
Zygomatic bone
What is the insertion of the Zygomatic Major and Minor muscles?
lateral corner of the mouth
What is the nerve supply of the Zygomatic Major and Minor muscles?
facial nerve (CN VII)
What is the blood supply of the Zygomatic Major and Minor muscles?
transverse facial artery
What is the action of the Zygomatic Major and Minor muscles?
act to raise the corner of the mouth and upper lip
What is noteworthy about the Zygomatic Major and Minor muscles?
“smile” muscles
What is the origin of the Levator Labii Superioris muscle?
infraorbital margin
What is the insertion of the Levator Labii Superioris muscle?
skin of upper lip
What is the innervation of the Levator Labii Superioris muscle?
buccal branch of facial nerve (CN VII)
What is the blood supply of the Levator Anguli Superioris muscle?
facial artery
What is the action of the Levator Anguli Superioris muscle?
act to raises the upper lip
What is noteworthy about the Levator Anguli Superioris muscle?
used to bare upper teeth, as in a sneer
What is the origin of the Levator Anguli Oris muscle?
maxilla below the infraorbital foramen
What is the insertion of the Levator Anguli Oris muscle?
corner of the mouth
What is the innervation of the Levator Anguli Oris muscle?
buccal branch of facial nerve (CN VII)
What is the blood supply of the Levator Anguli Oris muscle?
facial artery
What is the action of the Levator Anguli Oris muscle?
act to raise the corner of the mouth
What is noteworthy about the Levator Anguli Oris muscle muscle?
“smile” muscles
What is the origin of the Depressor Labii Inferioris muscle?
mandible
What is the insertion of the Depressor Labii Inferioris muscle?
skin of lower lip
What is the innervation of the Depressor Labii Inferioris muscle?
marginal mandibular branch of facial nerve (CN VII)
What is the blood supply of the Depressor Labii Inferioris muscle?
facial artery
What is the action of the Depressor Labii Inferioris muscle?
depresses the lower lip
What is noteworthy about the Depressor Labii Inferioris muscle?
used to bare lower incisor teeth
What is the origin of the Buccinator muscle?
alveolar processes of mandible and maxilla
What is the insertion of the Buccinator muscle?
angle of the mouth, orbicularis oris
What is the innervation of the Buccinator muscle?
buccal branch of the facial nerve (CN VII)
What is the blood supply of the Buccinator muscle?
facial artery
What is the action of the Buccinator muscle?
keeps cheeks taut, whistling and chewing
What is the origin of the Orbicularis Oris muscle?
skin and fascia of lips and surrounding lips
What is the insertion of the Orbicularis Oris muscle?
skin and fascia of lips
What is the innervation of the Orbicularis Oris muscle?
buccal branch of facial nerve (CN VII)
What is the blood supply of the Orbicularis Oris muscle?
facial artery
What is the action of the Orbicularis Oris muscle?
sphincter of the oral cavity, forms upper and lower lips, compresses lips against teeth, holds food during mastication
What is noteworthy about the Orbicularis Oris muscle?
“kissing muscle”
