Outline 15: Muscles Of The Face Flashcards
What is another name for chewing?
Mastication
Muscles of face have how many phases?
3
What are the names of 3 phases of facial muscles?
Oral phase
Pharyngeal phase
Esophageal phase
What happens during oral phase?
…. Part of stomach starts to get ready to digest
…. We salivate getting ready to digest
… Part of swallowing
What happens if someone does not have good oral phase?
- Food gets stuck, food leakage,
- Possible indication that sensory not doing well
- if sensory not doing well for swallowing….possible that larynx will not move up and down
- wont close in sphincter action and possible. Leakage into trachea
What happens in pharyngeal phase?
Tongue goes backwards
Propels bloods backward
Pharynx wall opens and closes and esophagus opens
What happens in esophageal phase?
Swallow enters esophagus….. Not to concerned after this point for speech
What is the biological function of the mandible?
Chewing
What are the movements of mandible?
Elevation Depression Laterization Protrusion Retraction
Are movements of mandible important for biting?
Yes
Does the jaw move to alter shape of oral phase?
Yes
Does jaw movement change resonance which shapes sounds?
Yes
How many muscles of mastication are there?
7
There are 3 elevator muscles of mastication…. Name them…
Temporalis
Masseter
Medial Pterygoid
Facts about temporalis…..
- goes over a lot of temporal bone
- elevates coronoid process
- wiggle ears because of this muscle
- fan shaped
- arises from temporal fascia (temple), than spreads anteriorly, superiorly, posteriorly
- looking at temporal bone.. , zygomatic process sticks out, so temporal process of zygomatic bone together they form an archway that lets muscles go underneath and that’s what temporalis does
Facts about Masseter…
Strongest and biggest elevator muscle for chewing
Masseter inserts into coronoid process
What is the biological function of the muscles of the face?
Chewing!!
Facts about medial Pterygoid muscle for mastication…..
- Most important muscle for speech
- arise from medial process of Pterygoid plate of sphenoid lower part bone
- fibers course posteriorly and inferiorly to insert on inside of Ramus of mandible
- deep to Masseter muscle; runs same course except one is on inside and one on outside
Does Pterygoid muscle and Masseter muscle form a cradle for the jaw?
Yes
There are 4 depressor muscles for mastication… Name them…..
Lateral Pterygoid
Mylohyloid
Geniohyoid
Anterior belly of digastricus
Facts about lateral Pterygoid (depressor for mastication)…..
- Has 2 heads; superior head that arises from greater wing of sphenoid bone
- Courses posteriorly to insert on Condyloid process of mandible
- Action of lateral Pterygoid is going to pull mandible downward
Facts of mylohyloid muscle( depressor muscle for mandible)….
- course of mylohyloid from line inside jaw coursing downward to insert on midline Ravi and onto body of hyoid bone
Facts about Geniohyoid ( muscle depressor of mandible)….
- sits ont of surface of mylohyloid;
- arises from mental synthesis
- posteriorly to hyoid bone
Facts of anterior belly of Digastricus….
Arises from mental synthesis
- courses laterally and posteriorly to insert on greater horns ( cornieu)
- so if hyoid muscle is fixed and muscles contract; they assist in lowering the mandible
Muscles for speech and facial expression have how many parts?
5
What are the names of 5 facial muscle areas…
Lips(cheek) Forehead Eyes Ears Hair
What is the name between cheek and teeth?
Buccal cavity
Muscles of cheek are called?
Buccinator muscles
Buccinator muscle…….
- Draws corners of mouth laterally and posteriorly(smile)
- Pulls lips backwards
- Sucks in lips against teeth
- Retraction of smiling ……?
Yes
Lips( cheek) muscles are categorized into how many parts?
4
What are the names of 4 categories of lip(cheek) muscles?
- rounding/ pursing/puckering
- retraction /smiling
- elevation/smiling
- depression/smiling
Name muscles of lips……
Orbicularis oris
Incisivus labii superior
Incisivus labii inferior
Facts about orbicularis oris….
- circle oral cavity
- Muscle goes all the way around
- For puckering
- Tightens lips(pursing)
- Tightens lips when eating, keeps lips closed
Facts about Incisivus labii superior….
- elevator labii superior
- muscle of raising
- draws corners of mouth up
Facts about Incisivus labii inferior …..
- frowning
- depressor muscle
- draws corners of mouth down
Retraction/smiling muscles for face is divided into…….
2 parts
What are the names of retraction/smiling muscles…..
Buccinator
Risorius
Facts about buccinator muscle……..
On other card regarding buccinator muscle
Facts about risorius muscle for smiling/retraction…..
Laughable
Smile
How many muscle to smile?
8
Name 8 smile muscles
Buccinator Risorius Quadratic labii superior Levator labii superior ( angular) Levator labii nasi(infra orbital) Zygomatic minor(zygomatic) Canine (levator Anguili oris) Zygomatic major
How many depressor/ frowning muscles?
4
Name 4 depressor muscles for facial expression
Triangularis( depressor anguli oris)
Quadrants labii inferior ( depressor labii inferior)
Mental is
Platysma
Forehead has facial muscles too… 2 of them …. Name?
Occipital frontalis Process muscle( pyramidal is nasi)
Facts of occipital frontalis……..
Broad muscle to occipital Moves scalp back and forth Raises eyebrows Raises nose Wrinkles forehead
Facts about Procrustean muscle( pyramidal is nasi)…….
Draws eyebrows
Scowl face
Intervation- cranial nerve 7(facial)
Eye has muscles….. Name it
Orbicularis Palpebrum
Orbicularis palpebrum has 2 parts…. Name?
Palpebral portion
Orbital portion
Facts about Palpebrum portion
Palpebrum fissure- how eyebrows look at corners
Eyelids( quiet closure)
Blinking
Facts of orbital portion………
Squeezes eyes closed
Ears have muscle to ..3…..name?
Anterior auricularis
Superior auricularis
Posterior auricularis
Theoretically what do these 3 ear muscles do?
Pull ears forward
Back and up
Relax
Facts of Hair muscles ( posterior head)…..
Occipital frontalis
