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47 Cards in this Set
- Front
- Back
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The teeth divide the mouth into 2 parts: |
1. The VESTIBULE (between lips and gums) 2. The ORAL CAVITY (behind the teeth) |
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The Vestibule contains the opening of the duct of what gland? |
The parotid gland |
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Where is the opening of the parotid duct? |
opposite the SECOND UPPER molar |
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What are the characteristics of the oral cavity? |
1. Contains the tongue
2. Roof = the hard and soft palates 3. Floor = beneath the tongue 4. Two walls = the teeth |
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The roof is made of:
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The HARD and SOFT palates |
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What bones make up the hard palate? |
Palatine process of the MAXILLA Two palatine bones |
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What makes up the SOFT palate |
Musculofibers - Contains the UVULA on its posterior border |
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The floor of the mouth contains ducts of what? |
Salivary glands - Sublingual - Submandibular (NOT PAROTID) |
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What are the two divisions of the muscles that make up the tongue? |
INTRINSIC and EXTRINSIC muscles |
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The Intrinsic muscles make up the ________ of the tongue |
BODY of the tongue |
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What fibres make up the intrinsic muscles of the tongue? |
Vertical Longitudinal Transverse - All groups intertwine with each other |
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What do the intrinsic muscles do? |
Alter the SHAPE of the tongue |
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What are the 4 EXTRINSIC muscles of the tongue? |
1. GENIOglossus 2. HYOglossus 3. STYLOglossus 4. PALATOglossus |
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What does the GENIOGLOSSUS do? |
Pulls the tongue FORWARD - Like a GENIE (tongue) being pulled out of its bottle (mouth) |
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Where does the GENIOGLOSSUS originate? |
The GENIAL TUBERCLE on the inside of the mandible |
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Where does the GENIOGLOSSUS insert? |
Genioglossus - inserts at the base of the tongue |
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Where does the HYOglossus originate |
on the HYOID bone (hence HYOglossus) |
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Where does each of the paired HYOGLOSSUS muscles insert? |
On each side of the tongue |
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What is the function of the HYOGLOSSUS |
DEPRESSES the tongue LATERALLY |
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What is the origin of the STYLOGLOSSUS? |
The STYLOID PROCESS |
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Where does the STYLOGLOSSUS insert? |
The SIDES of the tongue |
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What is the function of the STYLOGLOSSUS? |
ELEVATE Tongue RETRACT the tongue stylo = pen, think of retraction of the pen tip |
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What two extrinsic muscles insert at the sides of the tongue? |
1. Hyoglossus 2. Styloglossus |
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What is the origin of the PALATOGLOSSUS? |
Side of the palate |
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Where does the PALATOGLOSSUS insert? |
INSIDE the tongue |
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What is the function of the PALATOGLOSSUS? |
ELEVATES the tongue |
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What two extrinsic muscles ELEVATE the tongue? |
1. STYLOGLOSSUS 2. PALATOGLOSSUS |
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What are the specialized processes that cover the tongue? |
The PAPILLAE - Concentrated on top and side of tongue |
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What attaches the underside of the tongue to the floor of the mouth? |
the LINGUAL FRENULUM |
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What is the V shaped groove that separates the Anterior 2/3rds from the POSTERIOR 1/3 of the tongue? |
The SULCUS TERMINALIS |
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What nerves provide sensory innervation to the tongue? |
Anterior 2/3rds: CN V3 (5- mandibular) - General Sensation CN VII (7)- Taste Posterior 1/3rd CN IX (9) - Taste AND general sensation |
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All tongue muscles receive MOTOR innervation via CN XII (the hypoglossal nerve) EXCEPT FOR the __________________ |
THE PALATOGLOSSUS - Recives MOTOR info from the VAGUS nerve (CN X) |
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What is the only tongue muscle to receive MOTOR innervation from the VAGUS nerve? |
the PALATOGLOSSUS |
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What are the 3 salivary glands? |
1. PAROTID gland 2. SUBMANDIBULAR gland 3. SUBLINGUAL gland |
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Where is the PAROTID gland located? |
In front of the Ear |
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Where does the duct for the parotid gland empty? |
Opposite the second upper molar |
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What type of fluid does the PAROTID excrete? |
SEROUS fluid |
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What innervates the PAROTID gland? |
CN IX (the glossopharyngeal nerve) - 9 CN IX --> OTIC ganglion --> Parotid gland |
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Where is the SUBMANDIBULAR gland located? |
At the BASE of the jaw |
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Where is the duct for the SUBMANDIBULAR gland located and where is the opening? |
Duct is located under the tongue Opening of duct is near the FRENULUM |
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What type of fluid does the SUBMANDIBULAR gland secrete? |
SEROMUCUOUS fluid |
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Where are the SUBLINGUAL glands located |
On the floor of each side of the mouth, LATERAL to the duct of the submandibular gland |
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Where do the ducts of the SUBLINGUAL gland empty? |
1. By a series of small openings into the FLOOR of the mouth OR 2. Open into the SUBMANDIBULAR ducts |
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What nerve are the SUBMANDIBULAR and SUBLINGUAL glands both innervated by? |
CN VII (7) the FACIAL nerve CN VII --> Submandibular ganglion --> submandibular gland CN VII --> submandibular ganglion -->sublingual gland |
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What teeth does each half jaw contain? |
2 incisors 1 canine 2 premolars 3 molars |
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What nerve innervates the UPPER JAW and TEETH |
Maxillary component of the trigeminal nerve (CN V2) |
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What nerve innervates the LOWER JAW and TEETH? |
The MANDIBULAR component of the trigeminal nerve CN V3 |
