Facial Muscles (Q2,P3) PICTURES Flashcards
Origin
The unmoving end of the muscle that is attached to another structure
Insertion
The muscle attachment that is moved when the muscle is activated
Action
The function of a particular muscle/what the muscle does
Synergist
Separate muscles that work toward the same goal.
Two or more muscles may help each other
Antagonist
Separate muscles work against each other (antagonize each other)
Belly
- The widest part of the muscle
- The fleshy part of the muscle
- Some muscles have more than one
Occipital-frontalis/Epicranius (Occipitalis)
Origin: superior nuchal line (occipital bone)
Insertion: galea aponeurotica
Action: draws scalp posteriorly (toward the origin/ back of the head)
Occipital-frontalis/Epicranius (frontalis)
Definition: belly at the anterior of the cranium
Origin: galea aponeurotica
Insertion: skin of. Eyebrows and root of nose
Action: draws superior and wrinkles forword
Nickname: surprise muscle
Temporalis
Definition: located on the temples
Origin: temporal fossa
Insertion: Coronoid process (mandible)
Action: closes the jaw (muscle of mastication)
also called: strongest chewing muscle
Corrugator
Origin: superciliary arch of frontal bone
Insertion: skin of eyebrow
Action: draws eyebrows inferiorly and wrinkles skin over glabella
Nickname: frowning muscle; means cardboard, wrinkly
(forms interciliary sulci)
Procerus
Origin: Nasal bone
Insertion: frontalis muscle and skin of glabella
Action: pulls eyebrows inferiorly
Masseter
Origin: zygomatic bone and zygomatic arch of temporal bone
Insertion: angle and Ramos of mandible
Action: closes the jaw
Nickname: chewing muscle (masticate=chew)
Risorius
Origin: deep fascia of cheek
Insertion: skin at the corner of mouth
Action: draws corner of mouth Laterally
Nickname: false smile
Orbicularis oris
Origin: mandible, maxilla, and adjacent muscles to mouth
Insertion: skin and muscles of lips
Action: compresses and proteudes lips and closes mouth
Nickname: puckering muscle
Lavator Anguli Oris
- Origin: maxilla
- Insertion: Skin/muscle at corner of the mouth
- Action: Raises angle of the mouth
Also called: Snarling muscle
Found deep to the Quadratus labii superioris
Depressor labii inferioris
Origin: mandible
Insertion: skin of lower lip
Action: draws lower lip inferiorly and laterally
(Quadratus labii inferioris- means four sides)
Depressor Anguli Oris
Origin: mandible
Insertion: skin and muscles at corner of the mouth
Action: draws corner of mouth inferiorly
(Triangularis)
Mentalis
Origin: incisive fossa of mandible
Insertion: skin of chin
Action: elevates and protrudes lower lip, wrinkles skin of chin
(Mental=chin)
Digastric (Anterior Belly)
Origin: lower margin mandible
Insertion: hyoid bone
Action: lowers mandible and opens jaw; elevates hyoid bone
(Digastric=2 bellies)
Digastric (posterior belly)
Origin: mastoid process
Insertion: hyoid bone
Action: elevates hyoid bone during mastication (chewing) and swallowing
Levator palpebrae superioris (deep)
Origin: sphenoid bone inside rear of eye socket
Insertion: skin of superior eyelid
Action: draws eyelids open
Orbicularis oculi
Origin: frontal and maxilla bones and ligaments surround the eye sockets (encircles eye)
Insertion: inferior and superior palpebrae (encircles eye)
Action: closes eyelids, squinting, blinking, and draws eyebrows inferiorly
creates crow’s feet
type of sphincter muscle
Lavator labii superioris alaeque nasi
Definition; lifter of top lip, located on the sides of the face
Origin: upper rontal process of maxilla
Insertion: skin of lateral nostril wing and the upper lip
Action: raises upper lip and dilates the nostrils
Also called: common elevator
Lavator labii superioris
Origin: zygomatic bone and infraorbital margin maxilla bones
Insertion: muscle and skin of the upper lip
Action: lifts upper lip and exposes maxillary (upper) teeth
also known as: intermediate head of the quadratus labii superioris
