Muscles
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| What does mastication mean? | Process of which food is ground and crushed by teeth, first step of digestion. "Chewing"
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| What are the muscles of mastication? | masseter, temporal, pterygoid lateral and medial.
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| Which muscles elevate the mandible? | masseter, temporalis, medal pterygoid.
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| Which muscles depress the mandible? | geniohyoid, mylohyoid, digastric, lateral pterygoid, and infrahyoid.
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| Which muscles protrude the mandible? | lateral and medial pterygoid
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| What muscle retracts the mandible? | temporalis
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| What is the most powerful muscle of mastication that can be palpated? | Masseter muscle
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| What is the space that is bounded by the mandible, lateral pterygoid, and medial pterygoid? | Pterygoid mandibular space
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| Why is the pterygoid mandibular space important to the dental hygienist? | Where injections are given to numb the lower jaw.
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| Epicranial Origin | Frontal belly; epicranial aponeurosis
Occipital belly; occipital and temporal bones
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| Epicranial Insertion | Frontal belly; eyebrow and root of nose
Occipital belly; epicranial aponeurosis
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| Orbicularis oculi origin | Oribital Rim, frontal bone, and maxilla
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| Orbicularis oculi insertion | Later cants area, some encircle eye
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| Orbicularis oris origin | Encircles mouth
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| Orbicularis oris insertion | labial commissure
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| Buccinator origin | Maxilla, mandible, and pterygomandibular raphe
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| Buccinator insertion | labial commissure
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| Risorius Origin | fascia superficial to masseter muscle
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| Risorius insertion | labial commissure
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| Levator Labii Superioris Origin | Maxilla
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| Levator Labii Superioris Insertion | upper lip
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| Levator Labii Superioris alaeque nasi origin | Maxilla
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| Levator Labii Superioris alaeque nasi insertion | ala of nose and upper lip
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| Zygomaticus Major origin | Zygomatic bone
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| Zygomaticus Major insertion | Labial commissure
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| Zygomaticus minor origin | Zygomatic Bone
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| Zygomaticus minor insertion | upper lip
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| Levator anguli oris origin | Maxilla
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| Levator anguli oris insertion | labial commissure
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| Depressor anguli oris origin | Mandible
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| Depressor anguli oris insertion | labial commissure
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| Depressore labii inferioris origin | mandible
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| Depressore labii inferioris insertion | Lower lip
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| Mentalis Origin | Mandible
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| Mentalis Insertion | Chin
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| Platysma Origin | Clavicle and shouler
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| Platysma Insertion | Mandible and muscles of mouth.
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| Epicranial Facial Expression | Surprise
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| Orbicularis oculi facial expression | closing eyelid
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| Corrugator supercilii facial expression | frowning
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| Orbicularis oris facial expression | closing and pursing lips, as well as pouting and grimacing
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| Buccinator facial expression | compresses the cheeks during chewing
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| Risorius Facial Expression | Stretching lips
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| Levator Labii Superioris Facial Expression | Raising upper lip
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| Levator labii superioris alaeque nasi facial expression | Raising upper lip and dilating nares in a sneer
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| Zygomaticus major facial expression | Smiling
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| Zygomaticus minor facial expression | Raising upper lip, assisting in similng
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| Levator anguli oris facial expression | Smiling
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| Depressor anguli oris facial expression | Frowning
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| Depressor labii inferioris facial expression | Lowering lower lip
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| Mentalis Facial Expression | Raising chin and protruding lower lip
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| Platysma facial expression | Raising neck skin and grimacing
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| Intrinsic Tongue Muscles | Transverse Bands, Superior Longitudinal Bands, Inferior Longitudinal Bands, Vertical Bands
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| Extrinsic Tongue Muscles | Genioglossus, Styloglossus, Hyoglossus, Palatoglossus
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| TMJ | Temporomandibular Joint
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| How does the TMJ move when the mandible is protruded-moving lower jaw forward? | Gliding in both upper synovial cavities.
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| How does the TMJ move when the mandible is retracted-moving lower jaw backward. | Gliding in both upper synovial cavities.
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| How does the TMJ move when the mandible depressed and protruded-opening jaws? | Gliding both upper synovial cavities and rotation in both lower synovial cavities.
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| How does the TMJ move when the mandible is lateral deviated-shifting lower jaw side to side? | Gliding in one upper synovial cavity and rotation in opposite upper synovial cavity.
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Created by:
Strobelight95
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