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Oral Anatomy Test 1
Muscles
| Term | Definition |
|---|---|
| The muscles of facial expression are innervated by cranial nerve | VII |
| List the muscles that contribute to the making of a smile | Risorius, Levator anguli oris, Zygomaticus major, Zygomaticus minor |
| The muscles of mastication are innervated by cranial nerve | V3 |
| List the muscles of mastication | Masseter, Temporalis, Medial pterygoid, Lateral pterygoid |
| Bilateral contraction of the lateral pterygoids creates what action | Mandibular depression and/or protrusion |
| Unilateral contraction of the lateral pterygoid creates what action | Mandible shifts to the opposite side |
| List the muscles that elevate the mandible | Masseter, Medial pterygoid, Temporalis |
| Which muscle creates protrusion of the tongue | Genioglossus |
| Which nerve is responsible for the action of the genioglossus | Cranial nerve XII |
| Which muscle retracts the tongue | Styloglossus |
| What is the definition of origin | Attached to the least movable structure |
| What is the definition of insertion | Attached to the more movable structure |
| What is the definition of action | Movement accomplished by muscle attachment |
| What is the innervation for the muscles of mastication | V3 |
| Which muscle of mastication is the strongest | Masseter |
| What is the action of the temporalis | Elevation of Mandibule |
| What is the action of the masseter | Elevates the mandible |
| Where is the origin and insertion of the temporalis | Origin -temporal fossa Insertion -coronoid process of the mandible; has to travel medial of the Zygomatic to get there |
| Is the temporalis a powerful muscle | No |
| Which two muscles form a sling for the mandible | Medial pterygoid and masseter |
| What is the function of the medial pterygoid | Elevation of mandible |
| What is the action of the lateral pterygoid | Depression of the mandibleProtrusion of the mandible; ability to jet mandible forwardShifting of the mandible to the opposite side |
| Where does the frontal belly of the epicranius insert and originate | Insertion -eyebrow and root of nose Originate -epicranial aponerosis |
| Where does the occipital belly of the epicraniusoriginate and insert | Originate -occipital and temporal bones Insertion -Epicranial aponeurosis |
| What is the action of the epicranius | Rises the eyebrows and raises the scalp Facial expression |
| What is the action of the orbicularis oculi | Closes the eyelid, Squinting |
| Where does the corrugator supercili insert and originate | Origin -frontal bone Insertion -skin lateral to eyebrow |
| What is the action of the corrugator supercili | Moves the skin of the eyebrow medial and inferior. Vertical wrinkle in the forehead |
| Name the insertion and origin of the procerus | Origin -nasal bone Insertion -skin of the forehead |
| What is the action of the procerus | Horizontal wrinkles between the eyebrows |
| Which muscles causes flaring of nares, elevates the lip , and makes the nostrils flare | Levator labii superioris alaeque nasi |
| Which muscle originates ad the frontal process of the maxilla and inserts at the skin at ala of the nose and upper lip | Levator labii superioris alaeque nasi |
| The levator labii superioris muscle originates at the infraorbital rim. The zygomaticus major muscle originates at the skin at the angle of the mouth | First statement is true. Second statement is false |
| Name the smile muscles | Zygomatic major, Zygomatic minor, Levator angulioris, Risorius |
| Where does the zygomaticus major insert | Skin at the angle of the mouth |
| Which muscle inserts just medial to the Zygomatic major | Zygomaticus minor |
| Where is the origin and insertion of the levator anguli oris | Originates at the canine fossa of the maxilla and inserts at the skin at the angle of the mouth |
| Which muscle is considered the kissing muscle | Orbicularis oris |
| What is the action of the risorius | Widens the mouth, stretching the lips. One of the four smile muscles |
| What are the origins of the buccinator | Fibrous -pterygomandibular raphe 2 bony origins: buccal alveolar bone maxilla and mandible (molar region) |
| What are the actions of the buccinator | Pulls the angle of the mouth laterally Shortens the cheek vertically Shortens the check horizontally |
| Buccinator is one of the four smile muscles | False |
| Where is the blood supply for the tongue | lingual artery |
| Name the three functions of the tongue | Speech, Aids in mastication, Swallowing |
| What types of mucosa are involved in the tongue | Lining Masticatory Specialized |
| Is Masticatory mucosa kernatized | Yes |
| Where would you be able to find lining mucosa | Ventral surface of the tongue, floor of the mouth, alveolar and buccal mucosa, and the soft palate |
| What is the insertion of the genioglossus | Ventral surface of the tongue |
| What is the action of styloglossus | Retracts the tongue moving it superiorly and posteriorly |
| The hyoglossusmuscle depresses the tongue | True |
| Where does the hyoglossus muscle insert? | Inserts at the lateral surface of the tongue |
| Which intrinsic tongue muscles shortens and thickens the tongue | Superior longitudinal and inferior longitudinal |
| Which intrinsic tongue muscles lengthen and narrow the tongue | Transverse and Vertical |
| The levator veli palatine muscle is innervated by the pharyngeal plexus | True |
| Name the actions of the tensor veli palatine muscle | Opens Eustachian tube Secondary action -tenses and depresses the soft palate |
| What is the action of the constrictor muscles | Elevate pharynx/larynx |
| Name the muscles of the suprahyoid group | Digastric muscle, Mylohyoid muscle, geniohyoid muscle, and stylohyoid muscle |
| What is the anterior bellie and posterior bellies of the digastric innervated by | Anterior innervated by V3 Posterior innervated by VII |
| Which muscle forms the floor of the mouth | Mylohyoid |
| What is the action of the geniohyoid | Elevates the hyoid; depression of the mandible |
| What is the origin and insertion of the mylohyoid | Origin -mylohyoid ridge/line Insertion -body of the hyoid |
| What is the mylohyoid innervated by | Mylohyoid nerve (branch of V3) |
| Where does the stylohoid originate at | Styloid process |
| What is the action of the stylohyoid | Elevates the hyoid and depresses the mandible |
| Name the infrahyoid muscles | Sternothyroid muscle, Sternohoid muscle, Omohyoid muscle, Throhyoid muscle |
| What is the innervation of the infrahyoid muscles | Innervated by the 2rd and 3rd cervical nerve |
| What is the action of the sternohyoid | Depresses the hyoid |
| What is the action of the omohyoid | Depresses the hyoid |
| What is the origin and insertion of the thyrohyoid | Origin -thyroid cartilage Insertion -Greater conru of hyoid |
| What is the insertion of the sternocleidomastoid | Mastoid process |
| What is the origin of the SCM | Medial clavicle and superior and lateral sternum |
| What is the action of the trapezius | Elevates scapula and clavicle |
| What is the innervation of the trapezius | XI |
| Where does the insertion of the trapezius | Lateral 1/3 of the clavicle/scapula |
| Which muscle protrudes the tongue | Genioglossus |
| Which muscle of mastication originates on the Zygomatic arch | MasseterMasseter |
| Which muscle originates on the Zygomatic arch and inserts at the angle of the mouth | Zygomatic major |
| Orbicularis oris muscle contributes to a smile | False |
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marirose19
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